Hitachi vrf technical book 2 42 hp hitachi

<increasing needs of the East and Southeast

HITACHI INVERTER-DRIVEN MULTI-SPLIT SYSTEM HEAT PUMP AIR CONDITIONERS - SET-FREE FSN SERIES -

Technical Catalog II - Installation, Operation and Maintenance InstructionsModels <Indoor Units> • In-the-Ceiling Type RPI-0.8FSN RPI-2.0FSN RPI-4.0FSN

RPI-1.0FSN RPI-2.5FSN RPI-5.0FSN

RPI-1.5FSN RPI-3.0FSN

• 4-Way Cassette Type RCI-1.0FSN RCI-2.5FSN RCI-5.0FSN

RCI-1.5FSN RCI-3.0FSN

RCI-2.0FSN RCI-4.0FSN

• 2-Way Cassette Type RCD-1.0FSN RCD-2.5FSN RCD-5.0FSN

RCD-1.5FSN RCD-3.0FSN

RCD-2.0FSN RCD-4.0FSN

• Wall Type RPK-0.8FSNSM1 RPK-1.0FSNSM1 RPK-1.5FSNSM1 RPK-2.0FSNSM RPK-2.5FSNSM RPK-3.0FSNSM RPK-3.5FSNSM RPK-4.0FSNSM

• Floor Type RPF-1.0FSN(E)

RPF-1.5FSN(E)

• Floor Concealed Type RPFI-1.0FSN(E)

RPFI-1.5FSN(E)

• Ceiling Type RPC-2.0FSN RPC-4.0FSN

RPC-2.5FSN RPC-5.0FSN

RPC-3.0FSN

RAS-36FSN RAS-42FSN

RAS-38FSN

<Outdoor Units> Specifications in this catalog are subject to change without notice, in order that HITACHI may bring the latest innovations to their customers.

RAS-34FSN RAS-40FSN

<System Equipment> • Total Heat Exchangers KPI-2521

KPI-5021

KPI-8021

KPI-10021

Catalog No. SP2-S04, 2006

SP2-S04, 2006

IMPORTANT NOTICE G HITACHI pursues a policy of continuing improvement in design and performance of products. The right is therefore reserved to vary specifications without notice.

G HITACHI cannot anticipate every possible circumstance that might involve a potential hazard.

G This heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump air conditioner for other purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.

G The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable, if local regulations are not available. British Standard, BS4434 or Japan Standard, KHKS0010.

G No part of this manual may be reproduced without written permission.

G The following words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness. Definitions for identifying hazard levels are provided below with their respective signal words.

NOTE

:

Immediate hazards which WILL result in severe personal injury or death.

:

Hazards or unsafe practices which COULD result in severe personal injury or death.

:

Hazards or unsafe practices which COULD result in minor personal injury or product or property damage.

:

Useful information for operation and/or maintenance.

G It is assumed that this heat pump air conditioner will be operated and serviced by English speaking people. If this is not the case, the customer should add safety, caution and operating signs in the native language.

G If you have any questions, contact your distributor or dealer of HITACHI. G This manual gives a common description and information for this heat pump air conditioner which you operate as well as for other models.

G This heat pump air conditioner has been designed for the following temperatures. Operate the heat pump air conditioner within this range. (oC)

Temperature Maximum 32 DB / 25 WB

Minimum 21 DB / 15 WB

Outdoor Indoor

43 DB 27 DB

-5 DB 15 DB

Outdoor

15 WB

-20 WB

Cooling

Indoor

Operation Heating Operation

DB: Dry Bulb, WB: Wet Bulb

Attention This system has been designed for only cooling or heating operation.

Do not apply this system to the rooms where individual cooling and heating operation are required at the same time. If applied, it will result in uncomfortable air conditioning due to big temperature changes when the operation mode is changed.

This manual should be considered as a permanent part of the air conditioning equipment and should remain with the air conditioning equipment. i

SAFETY SUMMARY

G Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases are extremely dangerous and can cause an explosion. It is recommended that compressed air, nitrogen or refrigerant be used for these types of tests.

G Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If poured, it will cause a serious electrical shock.

G Do not touch or adjust safety devices inside the indoor or outdoor units. If these devices are touched or readjusted, it may cause a serious accident.

G Do not open the service cover or access panel for the indoor or outdoor units without turning OFF the main power supply.

G Refrigerant leakage can cause difficulty with breathing due to insufficient air. Turn OFF the main switch, extinguish any naked flames and contact your service contractor, if refrigerant leakage occurs.

G The installer and system specialist shall secure safety against refrigerant leakage according to local regulations or standards.

G Use an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an electric shock or a fire if it is not used.

G Do not install the outdoor unit where there is a high level of oil mist, flammable gases, salty air or harmful gases such as sulphur.

G Do not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within approximately one (1) meter from the system.

G If circuit breaker or fuse is often activated, stop the system and contact your service contractor.

G Do not perform installation work, refrigerant piping work, drain piping and electrical wiring connection without referring to our installation manual. If the instructions are not followed, it may result in a water leakage, electric shock or a fire.

G Check that the ground wire is securely connected. If the unit is not correctly grounded, it lead electric shock. Do not connect the ground wiring to gas piping, water piping, lightning conductor or ground wiring for telephone.

G Connect a fuse of specified capacity.

G Do not put any foreign material on the unit or inside the unit.

G Make sure that the outdoor unit is not covered with snow or ice, before operation.

G Before performing any brazing work, check to ensure that there is no flammable material around.

When using refrigerant be sure to wear leather gloves to prevent cold injuries.

G Protect the wires, electrical parts, etc. from rats or other small animals.

If not protected, rats may gnaw at unprotected parts and which may lead to a fire.

G Fix the cables securely. External forces on the terminals could lead to a fire.

ii

SAFETY SUMMARY

G Do not install the indoor unit, outdoor unit, remote control switch and cable within approximately 3 meters from strong electromagnetic wave radiators such as medical equipment.

G Supply electrical power to the system to energize the oil heater for 12 hours before start-up after a long shutdown.

G Do not step or put any material on the product.

G Provide a strong and correct foundation so that; a. The outdoor unit is not on an incline. b. Abnormal sound does not occur. c. The outdoor unit will not fall down due to a strong wind or earthquake.

NOTE: G It is recommended that the room be ventilated every 3 to 4 hours.

G The heating capacity of the heat pump unit is decreased according to the outdoor air temperature. Therefore, it is recommended that auxiliary heating equipment be used in the field when the unit is installed in a low temperature region.

iii

- CONTENTS For the information of the indoor units, please refer to Technical Catalog II, SP2-S02 or SP2-S03, 2006.

<Outdoor Unit> Items 1. Safety Summary 2. Structure 2.1 Structure 2.2 Refrigerant Cycle 2.3 Necessary Tools and Instrument List for Installation 3. Transportation and Handling 3.1 Combination of Indoor Unit and Outdoor Unit 3.2 Transportation 3.3 Handling of Outdoor Unit 4. Outdoor Unit Installation 4.1 Factory-supplied Accessories 4.2 Initial Check 4.3 Foundation 4.4 Installation Work 5. Refrigerant Piping Work 5.1 Piping Materials 5.2 Piping Connection 5.3 Stop Valve 5.4 Additional Refrigerant Charge Calculation 5.5 Refrigerant Piping Work 5.6 Multi-kit 6. Electrical Wiring 6.1 General Check 6.2 Electrical Wiring Connection 6.3 Dip Switch Setting of Outdoor Unit 7. Test Run 8. Safety and Control Service Setting 9. Common 9.1 Installation Space 9.2 Piping System and Multi-kit 9.3 Electrical Wiring 9.4 Test Run Procedure by Wireless Remote Control Switch (PC-LH3A) 9.5 Test Run from Outdoor Unit Side

iv

Page 3 3 3 4 6 7 7 7 7 8 8 8 9 9 10 10 12 14 15 16 18 21 21 22 25 30 35 36 36 44 52 57 60

- CONTENTS <Common> Items 1. Maintenance 1.1 Regular Inspection 1.2 Filter Cleaning 1.3 Filter and Element Cleaning for Total Heat Exchanger 2. Troubleshooting 2.1 Initial Troubleshooting 2.2 Troubleshooting by Alarm Code 2.3 Troubleshooting in Check Mode 2.4 Troubleshooting by 7-segment Display 2.5 Protection Control Code on 7-segment Display 2.6 Self-Checking of PCB using Remote Control Switch 2.7 Self-Checking of Remote Control Switch 3. Caution on Refrigerant Leakage

Page 67 (Please refer to Technical Catalog II, SP2-S02 or SP2-S03, 2006.)

67 67 67 69 75 82 85 87 89

v

OUTDOOR UNIT

1

- CONTENTS <Outdoor Unit> Items 1. Safety Summary 2. Structure 2.1 Structure 2.2 Refrigerant Cycle 2.3 Necessary Tools and Instrument List for Installation 3. Transportation and Handling 3.1 Combination of Indoor Unit and Outdoor Unit 3.2 Transportation 3.3 Handling of Outdoor Unit 4. Outdoor Unit Installation 4.1 Factory-supplied Accessories 4.2 Initial Check 4.3 Foundation 4.4 Installation Work 5. Refrigerant Piping Work 5.1 Piping Materials 5.2 Piping Connection 5.3 Stop Valve 5.4 Additional Refrigerant Charge Calculation 5.5 Refrigerant Piping Work 5.6 Multi-kit 6. Electrical Wiring 6.1 General Check 6.2 Electrical Wiring Connection 6.3 Dip Switch Setting of Outdoor Unit 7. Test Run 8. Safety and Control Service Setting 9. Common 9.1 Installation Space 9.2 Piping System and Multi-kit 9.3 Electrical Wiring 9.4 Test Run Procedure by Wireless Remote Control Switch (PC-LH3A) 9.5 Test Run from Outdoor Unit Side

2

Page 3 3 3 4 6 7 7 7 7 8 8 8 9 9 10 10 12 14 15 16 18 21 21 22 25 30 35 36 36 44 52 57 60

1.

Safety Summary

Please refer to pages (ii) and (iii) in this Technical Catalogue II.

2.

Structure

2.1

Structure

<RAS-34FSN, RAS-36FSN and RAS-38FSN> 24

23

24

3

9

22

6

22 24

9

3

7

9

26 8

9

24

4

17 5 18 20 13 20 21

20

20

13

10

19

12 11 25

1

25

2

25

2

25

2

25

2

21

16

23 24

14

No. Part Name 1 Compressor (Inverter) Compressor (Const. Speed) 2 (4pcs.)

3 Heat Exchanger (3pcs.)

4 Propeller Fan (3pcs.)

5 Fan Motor (3pcs.)

6 Accumulator 7 Oil Separator 8 Receiver Micro-Computer Control 9 Expansion Valve (6pcs.)

10 Reversing Valve (2pcs.)

11 Stop Valve (Gas) 12 Stop Valve (Liquid) 13 Solenoid Valve (4pcs.)

14 Check Joint (Low) 15 Check Joint (High) 16 Check Joint (for Oil) 17 Electrical Box (2pcs.)

18 Low Pressure Sensor 19 High Pressure Sensor High Pressure Switch for 20 Protection (5pcs.)

21 Strainer 22 Strainer 23 Distributor 24 Check Valve (6pcs.)

25 Crankcase Heater (7pcs.)

26 Plate Heat Exchanger

15

<RAS-40FSN and RAS-42FSN> 24

23

24

3

9

22

6

22 24

9

3

7

9

26

8

9

24

4

17

18 20 13 20 21

20

20

13

10

19

12 11

25

1

25

2

25

2

25

2

25

2

25

2

21

16

23 24

14

15

5

No. Part Name 1 Compressor (Inverter) Compressor (Const. Speed) 2 (5pcs.)

3 Heat Exchanger (3pcs.)

4 Propeller Fan (3pcs.)

5 Fan Motor (3pcs.)

6 Accumulator 7 Oil Separator 8 Receiver Micro-Computer Control 9 Expansion Valve (6pcs.)

10 Reversing Valve (2pcs.)

11 Stop Valve (Gas) 12 Stop Valve (Liquid) 13 Solenoid Valve (4pcs.)

14 Check Joint (Low) 15 Check Joint (High) 16 Check Joint (for Oil) 17 Electrical Box (2pcs.)

18 Low Pressure Sensor 19 High Pressure Sensor High Pressure Switch for 20 Protection (6pcs.)

21 Strainer 22 Strainer 23 Distributor 24 Check Valve (7pcs.)

25 Crankcase Heater (8pcs.)

26 Plate Heat Exchanger

3

2.2

Refrigerant Cycle

<RAS-34FSN, RAS-36FSN and RAS-38FSN>

4

<RAS-40FSN and RAS-42FSN>

5

2.3

Necessary Tools and Instrument List for Installation

No.

Tool

No.

Tool

No.

6

Copper Pipe Bender

11

1

Handsaw

2

Phillips Screwdriver

7

Manual Water Pump

12

3

Vacuum Pump

8

Pipe Cutter

4

Refrigerant Gas Hose Megohmmeter

9 10

5

Tool Spanner

No.

Tool

16

Leveller

Charging Cylinder

17

13

Gauge Manifold

18

Clamper for Solderless Terminals Hoist (for Indoor Unit)

Brazing Kit

14

Cutter for Wires

19

Ammeter

Hexagon Wrench

15

Gas Leak Detector

20

Voltage Meter

Use tools and measuring instruments only for the new refrigerant which is directly touch to refrigerant.

The pressure of refrigerant R410A is 1.4 times higher than that of conventional refrigerant, impurities such as moisture, oxide film, and grease affect easily R410A. Therefore, if the specified materials are not used, it may cause explosion, injury, leakage, electrical shock or fire. : Interchangeability is available with current R22 : Prohibited Measuring Instrument and Tool Pipe Cutter Chamfering Reamer Flaring Tool Extrusion Adjustment Gauge

Refrigerant Pipe

Interchangeability with R22 R410A R407C

-

Pipe Bender

Expanding Tool

Torque Wrench

Lubrication Oil (for Flare Surface)

Refrigerant Cylinder

Brazing Tool Nitrogen Gas

Vacuum Pump

Vacuum Drying .

Refrigerant Charge

Adapter for Vacuum Pump Manifold Valve

Charging Hose

Charging Cylinder Weight Scale

Refrigerant Gas Leakage Detector

: Interchangeability with R407C.

6

: only for Refrigerant R410A (No Interchangeability with R22) : only for Refrigerant R407C (No Interchangeability with R22) Reason of Non-Interchangeability and Attention ( : Strictly Required) * The flaring tools for R407C are applicable to R22. * If using flaring tube, make dimension of tube larger for R410A. * In case of material 1/2H, flaring is not available. * In case of material 1/2H, bending is not available.

Use elbow for bend and braze. * In case of material 1/2H, expanding of tube is not available. Use socket for connecting tube. * For φ12.7, φ15.88, spanner size is up 2mm. * For φ6.35, φ9.53, φ19.05, spanner size is the same. * Perform correct brazing work. * Strict Control against Contamin (Blow nitrogen during brazing.) * Use a synthetic oil which is equivalent to the oil used in the refrigeration cycle. * Synthetic oil absorbs moisture quickly. * Check refrigerant cylinder color.

Liquid refrigerant charging is required regarding zeotoropic refrigerant.

The current ones are applicable. However, it is required to mount a vacuum pump adapter which can prevent from reverse flow when a vacuum pump stops, resulting in no reverse oil flow. * No interchangeability is available due to higher pressures when compared with R22.

Do not use current ones to the different refrigerant.

If used, mineral oil will flow into the cycle and cause sludges, resulting in clogging or compressor failure.

Connection diameter is different; R410A: UNF1/2, R407C: UNF7/16. * Use the weight scale. * The current gas leakage detector (R22) is not applicable due to different detecting method.

Use Cutting Pipe Removing Burrs Flaring for Tubes Dimensional Control for Extruded Portion of Tube after Flaring Bending Expanding Tubes Connection of Flare Nut Brazing for Tubes Prevention from Oxidation during Brazing Applying Oil to the Flared Surface Refrigerant Charging

Vacuum Pumping

Vacuum Pumping, Vacuum Holding, Refrigerant Charging and Check of Pressures

Measuring Instrument for Refrigerant Charging Gas Leakage Check

3. Transportation and Handling 3.1

Combination of Indoor Unit and Outdoor Unit

• Various Indoor/Outdoor Unit Combinations The following indoor units can be combined with the HITACHI SET-FREE FSN outdoor unit.

Table 3.1 Indoor Unit Type List Indoor Unit Type

Nominal Capacity (HP) 0.8 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5.0

In-the-Ceiling 4-Way Cassette 2-Way Cassette Wall Floor Floor Concealed Ceiling

• Hanging Method When hanging the unit, ensure a balance of the unit, check safety and lift up smoothly.

(1) Do not remove any packing materials.

(2) Hanging Method Hang the unit under packing condition with four (4) wire ropes. Push through the wire ropes into the hang hole and clamp the wires by using shackle as shown in Fig. 3.1.

Wire Rope

Wooden Top Frame

Angle of wire rope o more than 60 .

Do not remove wooden frame and plastic band.

• A maximum total capacity of 130% and a minimum total capacity of 50% can be obtained by combination of the indoor units when compared with the nominal outdoor unit capacity.

Lead the wire ropes through the hanging hole and clamp the wire ropes by using shackles.

Do not apply any force to this plate. (Both Sides) Wooden Base

Table 3.2 System Combination Outdoor Unit Model RAS-34FSN RAS-36FSN RAS-38FSN RAS-40FSN RAS-42FSN

Minimum Combination Capacity (HP) 17.0 18.0 19.0 20.0 21.0

Indoor Unit Maximum Combina- Minimum Combination Individual tion Quantity Operation Capacity Capacity (HP) (HP) 44.2 4 to 32 0.8 46.8 4 to 32 0.8 49.4 4 to 32 0.8 52.0 4 to 32 0.8 54.6 5 to 32 0.8

Fig. 3.1 Hanging Work for Transportation (3) For Installation A. Remove the wooden base.

B. Apply four (4) wire ropes and hang the unit as shown in Fig. 3.2.

NOTE In case of transportation after unpacking, protect the unit with the splints or cloth.

Wire Rope

3.2

Transportation

Transport the product as close to the installation location as practical before unpacking.

Do not hang the unit by the ropes at the wooden base.

more than 1.5m Do not remove wooden frame and plastic band.

Apply ropes on the cushions more than 15mm thickness.

INCORRECT Wire Rope

Lead the wire ropes through the hanging hole and clamp the wire ropes by using shackles.

Do not apply any force to this plate.

(Both Sides)

Fig. 3.2 Hanging Work without Wooden Base

3.3

Handling of Outdoor Unit

Wooden Base

Do not step or put any material on the product.

Apply four wire ropes onto the outdoor unit, when lifting it by crane.

Do not put any foreign material into the outdoor unit and check to ensure that none exists in the outdoor unit before the installation and test run. Otherwise, a fire or failure, etc. may occur.

7

4. Outdoor Unit Installation 4.1

Factory-Supplied Accessories

Check to ensure that the following accessories are packed with the outdoor unit.

NOTE If any of these accessories are not packed with the unit, please contact your contractor.

Table 4.1 Factory-Supplied Accessories Accessory

Q'ty

Purpose

Compressed Sheet

1

Pipe Flange of Refrigerant Gas Piping Pipe with Flare Nut of Refrigerant Liquid Piping (φ19.05)

1 1

Connection for Refrigerant Liquid Piping

Rubber Bush

4

For Connection Hole of Operation Wiring

1

For Connection Hole of Power Source Wiring Spare

Screw

4.2

Connection for Refrigerant Gas Piping

3

Initial Check

• Install the outdoor unit with a sufficient space around the outdoor unit for operation and maintenance as shown in Fig. 4.1. (mm) Min. 1500

Front Side

Rear Side

*H

• When there are obstacles above the unit, the four (front, rear, right and left) sides of the unit shall be open in principle.

• Install the outdoor unit in a dry well ventilated environment.

• Install the outdoor unit where the sound or the discharge air from the outdoor unit does not affect neighbors or surrounding ventilation.

The operating sound at the rear or right/left sides is 3 to 6dB(A) higher than the value in the catalog at the front side.

• Check to ensure that the foundation is flat, level and sufficiently strong.

• Do not install the outdoor unit where there is a high level of oil mist, flammable gases, salty air or harmful gases such as sulphur.

• Do not install the outdoor unit where the electromagnetic wave is directly radiated to the electrical box.

• Install the outdoor unit as far as practical, being at least 3 meters from the electromagnetic wave radiator.

• When installing the outdoor unit in snowcovered areas, mount the field-supplied hoods on the top of the outdoor unit and the inlet side of the heat exchanger.

• Install the outdoor unit where it is in the shade or it will not be exposed to direct sunshine or direct radiation from high temperature heat source.

• Do not install the outdoor unit where dust or other contamination could block the outdoor heat exchanger.

• Install the outdoor unit in a space with limited access to general public.

• Do not install the outdoor unit in a space where a seasonal wind directly blows to the outdoor heat exchanger or a wind from a building space directly blows to the outdoor fan.

500

500

750

300 1/2H

Fig. 4.1 Installation and Service Space Add the half of dimension H to 300mm for air intake space of rear side, when the wall of rear side is higher than 500mm.

• In case of no walls at the front and the rear side of the unit, the space of 500mm for the front side and 300mm for the rear side is required.

• When there are walls around the unit, make the vent hole on the wall.

8

Aluminum fins have very sharp edges. Pay attention to the fins to avoid any injury.

NOTE Install the outdoor unit on a roof or in an area where people except service engineers can not touch the outdoor unit.

(3) Install the outdoor unit in the front-rear and right-left direction horizontally.

Check to ensure that the gradient in four directions (front, rear, right and left) is within 10mm.

(mm) Min. 300

Min. 10

Min. 20

Min. 600 to 900

Min. 10

Front Side

(1) Provide a open space above the unit.

(2) Keep a wall height as shown below.

Front Side: Max. 1,500mm Rear Side: Max. 500mm Right and Left Side: No Limit (3) If the wall height exceeds the above value, add a h1/2 or h2/2 dimension to the service space of the front or rear side.

(4) The maximum outdoor unit quantity should be 2 in one block.

Right Side and Left Side

Front Side and Rear Side

(4) Provide a strong and correct foundation so that; a. The outdoor unit is not on an incline. b. Abnormal sound does not occur. c. The outdoor unit will not fall down due to a strong wind or earthquake.

(mm) Wall Height: No Limit

h1 500

(5) When installing the outdoor unit, fix the unit by anchor bolts. Refer to Fig. 4.3 regarding the location of fixing holes.

h2 Max. 1500

Unit: mm Min. 300+h1/2

4.3

760

Min. (600 to 900)+h2/2

Foundation

â&#x20AC;˘ Concrete Foundations (1) The height of the foundation should be 100 to 300mm higher than the ground level.

(2) Install a drainage around foundation for smooth drain.

782

782

782

782

10-38x16 Hole of Anchor Bolt

Fig. 4.3 Position of Anchor Bolts

4.4

Installation Work

(1) Secure the outdoor unit with the anchor bolts.

more than 100 5 90 17

125

Outdoor Unit Vibration Proof Mat

Less than 300

Anchor Bolt

Nut

Drainage

Washer more than 100

Mortar Hole 100 x Depth 20

17 90

Details of P

Correct

Foundation

(760) (614) 794

Incorrect

Foundation

Fig. 4.2 Foundations

17 90

100mm

Drainage (Width 100 x Depth 20)

Concrete

Anchor Bolt M12 Filled Mortar

(2) When installing the unit on a roof or a veranda, drain water sometimes turns to ice in a cold morning. Therefore, avoid draining into an area where people often use because it is slippery.

(3) When drain piping is necessary for the outdoor unit, use the drain kit (DBS-26).

9

5.

Refrigerant Piping Work NOTE See the items 5.4, 5.5 and 5.6 before refrigerant piping work.

For connecting Ď&#x2020;31.75 pipe to RAS-34FSN unit, cut off the section which is used for connecting with the longer pipe size.

ID 32.0

100

Use refrigerant R410A in the refrigerant cycle.

Do not charge oxygen, acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases are extremely dangerous and can cause an explosion. It is recommended that compressed air, nitrogen or refrigerant be used for these types of tests.

Check to ensure that no pressure exists inside the stop valve before removing the flange.

ID 35.2

29 116

5.1

Piping Materials

(1) Prepare locally-supplied copper pipes.

(2) Select the piping size from the Table 5.1 and Table 5.2.

(3) Select clean copper pipes. Make sure there is no dust and moisture inside of the pipes. Blow the inside of the pipes with nitrogen or dry air, to remove any dust or foreign materials before connecting pipes.

Do not use any tools which produce a lot of swarf such as a saw or a grinder.

Factory Supplied Pipe Flange for RAS-34FSN

For connecting Ď&#x2020;38.1 pipe to RAS-36FSN to RAS-42FSN unit, use the pipe flange (factorysupplied).

ID 38.3

100

Ensure to connect the piping among the units in the same refrigerant cycle.

29 167

Factory Supplied Pipe Flange for RAS-36FSN to RAS-42FSN

10

Cautions for Refrigerant Pipe Ends When installing pipe through the wall, secure a cap at the end of the pipe.

Incorrect Correct

Do not place the pipe directly on the ground.

Correct

Incorrect

• Flaring Dimension Perform the flaring work as shown below.

45 o

Hole

Attach a cap or vinyl tape.

Correct

Attach a cap or vinyl tape.

φd

( ) It is impossible to perform the flaring work with 1/2H material. In this case, use an accessory pipe (with a flare).

Rain water can enter.

Attach a cap or vinyl bag with rubber band.

• Piping Thickness and Material Use the pipe as below.

Table 5.1 Piping Size of Outdoor Unit Unit: mm (in.)

Liquid Piping φ19.05 (3/4) φ19.05 (3/4) φ19.05 (3/4) φ19.05 (3/4) φ19.05 (3/4)

Table 5.2 Piping Size of Indoor Unit Indoor Unit Models RPI-0.8FSN, 1.0FSN, 1.5FSN RCI-1.0FSN, 1.5FSN RCD-1.0FSN, 1.5FSN RPK-0.8FSNSM1, 1.0FSNSM1, 1.5FSNSM1 RPF-1.0FSN(E), 1.5FSN(E) RPFI-1.0FSN(E), 1.5FSN(E) RPI-2.0FSN, RCI-2.0FSN, RCD-2.0FSN, RPK-2.0FSNSM, RPC-2.0FSN RPI-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN RCI-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN RCD-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN RPK-2.5FSNSM, 3.0FSNSM, 3.5FSNSM, 4.0FSNSM RPC-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN

6.35 9.53 12.7 15.88 19.05

0.4 ~ 0.8R

Incorrect

Outdoor Unit Models Gas Piping RAS-34FSN φ31.75 (1-1/4) RAS-36FSN φ38.1 (1-1/2) RAS-38FSN φ38.1 (1-1/2) RAS-40FSN φ38.1 (1-1/2) RAS-42FSN φ38.1 (1-1/2)

Diameter φd

+ 2o

φA

Hole

(mm) +0 A -0.4 R410A R407C 9.1 9.0 13.2 13.0 16.6 16.2 19.7 19.4 23.3 ( )

90o + 2o

Unit: mm (in.)

Gas Liquid Piping Piping

φ12.7 (1/2)

φ6.35 (1/4)

φ15.88 (5/8)

φ6.35 (1/4)

φ15.88 (5/8)

φ9.53 (3/8)

Diameter φ6.35 φ9.53 φ12.7 φ15.88 φ19.05 φ22.2 φ25.4 φ28.6 φ31.75 φ38.1 φ44.45

(mm) R410A R407C Thickness Material Thickness Material 0.8 O material 0.8 O material 0.8 O material 0.8 O material 0.8 O material 0.8 O material 1.0 O material 1.0 O material 1.0 1/2H material 1.0 O material 1.0 1/2H material 1.15 O material 1.0 1/2H material 1.0 1/2H material 1.0 1/2H material 1.0 1/2H material 1.1 1/2H material 1.1 1/2H material 1.35 1/2H material 1.15 1/2H material 1.55 1/2H material 1.25 1/2H material

• Joint Selection If you use 1/2H material, you can not perform the flaring work. In this case, use a joint selected from the chart below. <Minimum Thickness of Joint (mm)> Diameter φ6.35 φ9.53 φ12.7 φ15.88 φ19.05 φ22.2 φ25.4 φ28.6 φ31.75 φ38.1 φ44.45

R410A 0.5 0.6 0.7 0.8 0.8 0.9 0.95 1.0 1.1 1.35 1.55

R407C 0.5 0.6 0.7 0.8 0.8 0.9 0.95 1.0 1.05 1.25 1.25

<Flare Nut Dimension B (mm)> Diameter φ6.35 φ9.53 φ12.7 φ15.88 φ19.05

R410A 17 22 26 29 36

B

R407C 17 22 24 27 36 Flare Nut

11

5.2

Piping Connection

• Position of Connecting Pipes to the Outdoor Unit

Refrigerant Liquid Piping Connection (φb with Flare Nut)

247 (Refrigerant Gas Piping Connection)

Refrigerant Gas Piping Connection (φa with Flange)

274 (Refrigerant Liquid Piping Connection)

Connect the pipes with the liquid line stop valve and the gas line stop valve of the outdoor unit as shown in Fig. 5.1.

1. Attach the pipe cover to avoid entering rats or other small animals into the unit.

2. Completely seal the conduit inlet with sealing materials.

3. Make a drain hole at the lowest part of the conduit.

Pipe

138

Cable

159 (Refrigerant Gas Piping Connection)

234

(mm) Model

Pay attention to the followings to run through the cables under the unit using conduit for piping and wiring works. (The pipe cover is required to remove before performing piping and wiring works.)

a

b

RAS-34FSN

31.75

19.05

RAS-36FSN

38.1

19.05

RAS-38FSN

38.1

19.05

RAS-40FSN

38.1

19.05

RAS-42FSN

38.1

19.05

171 (Refrigerant Liquid Piping Connection)

Pipe Cover

Fig. 5.1 Refrigerant Piping Connection

Front Side

Conduit

Seal

• Piping Connection (1) Confirm that the valve is closed.

(2) Prepare a field-supplied bend pipe for liquid line. Connect it to the liquid valve by flare nut through the square hole of bottom base.

(3) For Gas Piping Connection Prepare a fild-supplied bend pipe for gas line. Solder it and the factory-supplied pipe flange at the outside of the unit.

Rear Side

Factory-Supplied Pipe Flange Bottom Side Bottom Base

Solder by Bottom Side Up

Fig. 5.2 Piping Direction Field-Supplied Bend Pipe

Special washers (silver-panted) are fixed with compressor for vibration absorption.

Never remove these special washers.

Special washers are fixed with special nuts.

Special Washer (Silver-Painted)

(4) Remove the flange and the gasket attached to the unit before shipping, and attach the new gasket (factory-supplied) before connecting the pipe flange to the gas valve.

Gas Valve

Foot of Compressor Special Nut Redundant Compressed Sheet

Compressed Sheet (Accessory) Flange (Accessory)

Closing Flange Bolt (Q'ty: 2)

Vibration-Proof Rubber

12

Fig. 5.3 Piping Connection (5) Solder the bend pipes and field piping.

• When tightening the flare nut, use two spanners.

Do not apply a two-spanner work here.

Refrigerant leakage shall occur.

(4) Check for any gas leakage at the flare nut connections, or brazed parts by gas leakage tester or by use of a foaming agent.

Procedure Completion of Ref. Piping

Two-Spanner Work

Tightening Work for Stop Valve

Check to ensure that no pressure increase is observed one hour after vacuum pumping completion.

Table. 5.3 Tightening Work of Flare Nut Required Torque Pipe Size

Tightening Torque

(1/4)

20N-m (2 kg-m)

φ9.53

(3/8)

40N-m (4 kg-m)

φ12.7

(1/2)

60N-m (6 kg-m)

φ6.35

φ15.88 (5/8)

80N-m (8 kg-m)

φ19.05 (3/4)

100N-m (10 kg-m)

Bolt for Flange (Factory-Supplied)

53 to 75N-m (5.4 to 7.6 kg-m)

• Evacuation and refrigerant charging procedure should be performed according to the following instructions and Fig. 5.5.

(1) The stop valve has been closed before shipment, however, make sure that the stop valves are closed completely.

(2) Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping.

Suspend the refrigerant piping at specified points and prevent the refrigerant piping from touching weak parts of the building such as wall, ceiling, etc.

(Abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length.)

(3) Connect the manifold gauge using charging hoses with a vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves.

Perform the air-tight test.

Connect a manifold gauge to the check joints of the liquid and gas stop valves in the outdoor unit. Do not open the stop valves. Apply nitrogen gas pressure of 4.15MPa for FSN series.

Applying Nitrogen Gas

Check of Pressure Decrease

Pass

Repairing of Leakage Part

(5) Connect a manifold gauge to the check joints at the both sides.

Continue vacuum pumping work until the pressure reaches -756mmHg or lower for one to two hours.

After vacuum pumping work, stop the mani-fold valve’s valve, stop the vacuum pump and leave it for one hour. Check to ensure that the pressure in the manifold gauge does not increase.

NOTES: 1. If tools or measuring instruments come into contact with the refrigerant, ensure they are tools specified for use with R410A. 2. If vacuum degree of -756mmHg is not available, it is considered that there is a gas leakage. Check for any gas leakage once again. If no leakage exists, operate the vacuum pump for one to two hours.

(6) To charge refrigerant, connect the manifold gauge using charging hoses with a refrigerant charging cylinder to the check joint of the liquid line stop valve.

(7) Fully open the gas line stop valve and slightly open the liquid line stop valve.

(8) Charge refrigerant by opening the manifold gauge valve.

(9) Charge the required refrigerant within the difference range of ±0.5kg by operating the system in cooling.

(10) Fully open the liquid line stop valve after completing refrigerant charge.

(11) Continue cooling operation for more than 10 minutes to circulate the refrigerant.

13

5.3 An excess or a shortage of refrigerant is the main cause of trouble to the units.

Charge the correct refrigerant quantity as shown in the item 5.4 and the item 5.5.

Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause difficulty with breathing or harmful gases would occur if a fire was being used in the room. â&#x20AC;˘ Insulate the refrigerant pipes as shown in Fig. 5.4

Stop Valve

Operation of the stop valve should be performed according to the following Table 5.4.

Hexagonal Wrench

Cap

Ref. Pressure

To open or close spindle valve

Tighten the cap with a torque below.

(Attach this after work)

Spindle Valve Liquid 44.1

Check Joint

O-Ring (Rubber)

Only the charging hose can be connected.

Tighten the cap with a torque of 9.8N m

Stop Valve

(N m) Gas 58.8

Counterclockwise .....Open Clockwise .....Close Closed before shipment.

Refrigerant Piping

Table 5.4 Stop Valve Hexagonal Wrench Size (mm) Liquid Valve 10

Insulation (Field-Supplied)

Gas Valve 10

Refrigerant Piping (Field-Supplied)

Fig. 5.4 Insulation on Pipes After connecting the refrigerant piping, seal the refrigerant pipes by using the field-supplied insulation material. Insulate the unions and flare nuts at the piping connections completely.

Insulate the liquid piping and gas piping completely to avoid decreasing of performance and dewing on the surface of the pipe.

Cap the end of the pipe when the pipe is to be inserted through a hole.

Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe.

Do not place the pipe directly on the ground.

Correct

Incorrect

Attach a cap or vinyl tape.

14

Do not apply an abnormal big force to the spindle valve at the end of opening (5.0N-m or smaller).

The back seat construction is not provided.

Do not loosen the stop ring. If the stop ring is loosened, it is dangerous, since the spindle will hop out.

At the test run, fully open the spindle.

If not fully opened, the devices will be damaged.

5.4

Additional Refrigerant Charge Calculation Table 5.5 Additional Refrigerant Charge Calculation

Additional Charge of Refrigerant R410A (FSN Series) Although refrigerant has been charged into this unit, it is required that additional refrigerant be charged according to piping length.

A. Determine an additional refrigerant quantity according to the following procedure, and charge it into the system.

B. Record the additional refrigerant quantity to facilitate service activities thereafter.

42HP

φ19.05x20m

φ9.53x5m φ9.53x5m φ9.53x5m φ6.35x10m φ9.53x5m φ9.53x5m φ9.53x5m φ9.53x5m φ9.53x5m 2.5HP 4.0HP 5.0HP 4.0HP 5.0HP 2.5HP 2.5HP 2.5HP 2.0HP No. 2 No. 4 No. 6 No. 8 No. 0 No. 1 No. 3 No. 5 No. 7

φ19.05x5m φ15.88x5m φ19.05x5m φ19.05x5m φ12.7x5m

1. Calculating Method of Additional Refrigerant Charge (W kg) 1.1 Additional Refrigerant Charge Calculation for Liquid Piping (W1 kg) See Example for Model RAS-42FSN, and fill in the following table.

Pipe Diameter φ22.2 ..... φ19.05 ... φ15.88 ... φ12.7 ..... φ9.53 ..... φ6.35 .....

Example

Total Piping Length (0) (20 + 5 x 3) (5) (5) (5 x 8) (10) Additional Charge W1

Pipe Diameter φ22.2 ..... φ19.05 ... φ15.88 ... φ12.7 ..... φ9.53 ..... φ6.35 .....

This System

Additional Charge (kg) x 0.390 = 0.00 x 0.280 = 9.80 x 0.190 = 0.95 x 0.120 = 0.60 x 0.07 = 2.80 x 0.03 = 0.30

Total Piping Length

<Table 1>

Total = 14.45 (kg) Additional Charge (kg) x 0.390 = x 0.280 = x 0.190 = x 0.120 = x 0.07 = x 0.03 =

Additional Charge W1

Total =

Outdoor Unit

W0 Outdoor Unit Ref. Charge (kg)

RAS-34FSN

28.5

RAS-36FSN

31.0

RAS-38FSN

31.0

RAS-40FSN

32.0

RAS-42FSN

32.0

NOTE: W0 is outdoor unit ref. charge before shipment.

(kg)

1.2 Additional Refrigerant Charge Calculation for Indoor Unit (W2 kg) Additional refrigerant charge is 1 kg/unit of 8HP and 10HP indoor unit.

Additional refrigerant charge of less than 8HP indoor units are not needed.

(Total Combination unit of 8HP and 10HP.)

(Example) This System

W2 = W2 =

0

unit x 1.0 kg/unit = unit x 1.0 kg/unit =

0.0

kg kg

1.3 Calculation of Additional Charge (W kg) Put weight W1 and weight W2 calculated in items 1.1 and 1.2 into the following formula.

Total Volume of Additional Charge W = W1 + W2 (Example) W = 14.45 + 0.0 = 14.45 kg This System W = + = kg

2. Charging Work Charge refrigerant (R410A) into the system according to the instructions described in the "Installation Manual".

Total Additional Charge W

kg

Total Ref. Charge of This System

kg

Date of Ref. Charge Work Year

Month

Day

3. Record of Additional Charge Record the refrigerant charging quantity in order to facilitate maintenance and servicing activities.

Total refrigerant charge of this system is calculated in the following formula.

Total Ref. Charge of This System = W + W0 This System = + = kg

15

5.5

Refrigerant Piping Work Table 5.6 Piping System

< Outdoor Unit to First Branch > Outdoor Unit Capacity

Gas/Liquid (φmm) Equivalent Piping Length < 100m Equivalent Piping Length >100m *1)

34HP

31.75/19.05

38.1/22.2

36 to 42HP

38.1/19.05

44.45/22.2

< Multi-kit to Indoor Unit > Pipe Size Indoor Unit Capacity 0.8 to 1.5HP 2HP

H1

2.5 to 5HP

Gas/Liquid (φmm)

Max. Length of Liquid Pipe

12.7/6.35 *2)

15m

15.88/6.35 *2)

15m

15.88/9.53

30m

*2): In the case that liquid piping length is longer than 15m, use φ9.53 pipe and reducer (field-supplied).

Indoor Unit

< First Branch >

Indoor Unit

H2

Outdoor Unit Capacity

Multi-Kit

34 to 42HP

E-302SN

Indoor Unit

Indoor Unit

Indoor Unit L3

Indoor Unit

L3

L3

L3

L3

L3 L2

L1

< Piping Size and Multi-kit after First Branch > Total I. U. Capacity in HP

Gas/Liquid (φmm)

36~

38.1/19.05

26~35.99

31.75/19.05

18~25.99

28.6/15.88

16~17.99

28.6/12.7

12~15.99

25.4/12.7

Multi-kit Model E-302SN

Item Ref. Pipe Length: L1

Actual Equivalent

Applicable Range within 150m within 175m

Piping Length from 1st Branch to each I. U.: L2

within 40m

E-162SN

Piping Length from each Multi-kit to I. U.: L3

within 30m

E-242SN

9~11.99

22.2/9.53

E-102SN

Lift between

O. U. is Higher

within 50m

6~8.99

19.05/9.53

E-84HSN *3)

I. U. and O. U.: H1

O. U. is Lower

within 40m

lower than 6

15.88/9.53

E-108HSN *3)

Lift between Indoor Units: H2

within 15m

Total Actual Length of Liquid Pipes

within 300m

*3) Total I. U. Capacity in HP

Number of Branches

5~10

8 branches

E-108HSN

5~8

4 branches

E-84HSN

Multi-kit

In case that the selected multi-kit size is bigger than that of the first branch, use the same size as the first branch.

In case that the selected pipe size after the first branch is bigger than the pipe size before the first branch, use the same size as before the branch.

If the pipe length from the O.U. to the first branch is more than 100m, the pipe size must be increased (refer to *1)).

In this case, the pipe size from the first branch to the second branch should be selected according to the original pipe size.

16

Special Attention Regarding Refrigerant Gas Leakage Pay attention to the critical gas concentration to avoid accidental refrigerant gas leakage before installing air conditioning systems.

Totally Charged Refrigerant Quantity in System (kg) â&#x2030;¤ Critical Concentration (kg/m3) Room Space for each Indoor Unit (m3) 0.3 kg/m3 In the case that the calculated critical concentration is bigger than 0.3kg/m3, take the following actions.

1) Provide a gas leakage detector and exhaust fan(s) controlled by its gas leakage detector.

2) Provide each effective opening at the wall or door for ventilation to next door so that the critical gas concentration can be maintained lower than the above value.

(Provide an opening more than 0.15% of floor surface at the lower part of a door.)

Outdoor Unit Nitrogen Tank (for Nitrogen Blow during Brazing and Air Tight Test) Stop Valve (Liquid Line)

Manifold Gauge

Stop Valve (Gas Line)

Refrigerant Cylinder (R410A)

Weigher

Vacuum Pump

Cover the flare nut and unit with thermal insulator.

Gas Line Liquid Line

Indoor Unit

Indoor Unit

Insulation Multi-Kit

Insulation

Fig. 5.5 Evacuation and Refrigerant Charge

1. Maximum Permissible Concentration of HFC GAS R410A The refrigerant R410A is an incombustible and non-toxic gas.

However, if leakage occurs and gas fills a room, it may cause suffocation. The maximum permissible concentration of HFC gas, R410A in air is 0.3kg/m3, according to the refrigeration and air conditioning facility standard (KHK S 0010) by the KHK (High Pressure Gas Protection Association) Japan. Therefore, some effective measure must be taken to lower the R410A concentration in air below 0.3kg/m3, in case of leakage.

As for R410A, this consideration is applied similarly.

2. Calculation of Refrigerant Concentration (1) Calculate the total quantity of refrigerant R (kg) charged in the system connecting all the indoor units of objective rooms.

(2) Calculate the room volume V (m3) of each objective room.

(3) Calculate the refrigerant concentration C (kg/m3) of the room according to the following equation.

R: Total Quantity of Charged Refrigerant (kg) V: Room Volume (m3) = C: Refrigerant Concentration â&#x2030;¤ 0.3 (kg/m3) If local codes or regulations are specified, follow them. <Example> British Standard BS4434 1989 Commercial office Building Class D Occupancy C=0.17 (kg/m3)

17

5.6

Multi-Kit Table 5.7 Multi-Kit for Line Branch (1/2)

Multi-Kit

E-102SN

ID 22.2 ID 12.7

ID 19.05

ID 15.88

ID 15.88

Gas Line

φ25.4 φ19.05 ID 15.88 ID 12.7

ID 9.53

ID 19.05 ID 22.2 φ22.2

Q'ty: 2

φ12.7

ID 9.53

Liquid Line

φ9.53 ID 9.53 ID 6.35

ID 6.35 ID 9.53

Multi-Kit

E-162SN

φ22.2

ID 25.4

ID 25.4 OD 28.6

ID 28.6

Gas Line

OD 6.35

φ9.53

φ25.4 φ22.2 ID 22.2 ID 19.05 ID 15.88 ID 12.7

φ12.7

ID 28.6

ID 15.88

ID 12.7 ID 19.05 ID 22.2

ID 25.4

φ9.53

ID 12.7

Liquid Line

ID 9.53 φ9.53 ID 12.7 ID 9.53 ID 6.35

ID 9.53 ID 12.7

OD 6.35

Unit: mm, ID: Inner Diameter, OD: Outer Diameter 18

Table 5.8 Multi-Kit for Line Branch (2/2)

Multi-Kit

E-242SN ID 25.4 φ22.2

ID 28.6

ID 25.4

ID 15.88

OD 28.6 φ25.4 φ22.2

Gas Line

ID 28.6

ID 22.2

ID 12.7 ID 19.05

ID 25.4

ID 19.05

ID 22.2

ID 15.88 ID 12.7

φ25.4

ID 9.53 ID 12.7

ID 15.88

Liquid Line

ID 9.53

φ19.05 ID 15.88 ID 12.7 ID 9.53 ID 6.35

Multi-Kit

ID 15.88 φ19.05

OD 6.35

E-302SN

OD 31.75

φ31.75

ID 28.6 ID 22.2

ID 32.0 ID 38.1

Gas Line

ID 25.4 ID 38.1

φ31.75 ID 32.0

ID 25.4 OD 28.6

ID 15.88 φ38.1

φ28.6 ID 12.7 ID 19.05 ID 22.2

ID 28.6

φ25.4 ID 22.2 ID 19.05

Liquid Line

Q'ty: 2 ID 34.92

ID 19.05 ID 15.88

ID 9.53

ID 9.53

φ19.05 ID 15.88 ID 12.7 ID 9.53

ID 12.7 ID 22.2

OD 6.35

φ22.2

ID 6.35

Unit: mm, ID: Inner Diameter, OD: Outer Diameter 19

Table 5.9 Multi-Kit for Header Branch

Multi-Kit

E-84HSN Q'ty: 2 ID 19.05

ID 15.88

φ19.05

ID 15.88

Gas Line

φ12.7

φ15.88

ID 12.7

OD 12.7 Q'ty: 2

ID 15.88 ID 12.7

φ9.53

OD 12.7

Q'ty: 7

φ19.05

ID 9.53

φ9.53

φ6.35

φ9.53

Liquid Line ID 6.35

OD 6.35

ID 6.35 Q'ty: 2 ID 9.53 OD 6.35

ID 9.53

Multi-Kit

E-108HSN Q'ty: 2

ID 19.05 φ22.2

ID 22.2

ID 15.88

ID 15.88

φ12.7

Gas Line

φ19.05

OD 12.7

ID 19.05

ID 12.7

ID 15.88

Q'ty: 6

ID 12.7

ID 12.7

ID 15.88 φ15.88 φ9.53

OD 12.7 Q'ty: 10

φ19.05

ID 9.53

φ9.53

Liquid Line

φ6.35 OD 6.35

ID 6.35

ID 6.35 Q'ty: 6

ID 9.53

ID 9.53

OD 6.35

ID 12.7

Unit: mm, ID: Inner Diameter, OD: Outer Diameter 20

6.

Electrical Wiring

Turn OFF the main power switch to the indoor unit and the outdoor unit and wait for more than 3 minutes before electrical wiring work or a periodical check is performed.

Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or a periodical check is performed.

Protect the wires, electrical parts, etc. from rats or other small animals.

If not protected, rats may gnaw at unprotected parts and which may lead to a fire.

Avoid the wirings from touching the refrigerant pipes, plate edges and electrical parts inside the unit.

If not do, the wires will be damaged and at the worst, a fire will occur.

Use a medium sensing speed type ELB (Electric Leakage Breaker, activation speed of 0.1 sec. or smaller). If not used, it will cause an electric shock or a fire.

Fix the cables securely. External forces on the terminals could lead to a fire.

Tighten screws according to the following torque.

M4: 1.0 to 1.3 N-m M5: 2.0 to 2.4 N-m M6: 4.0 to 5.0 N-m M8: 9.0 to 11.0 N-m M10: 18.0 to 23.0 N-m

Tightly secure the power source wiring using the cord clamp inside the unit.

NOTE

Earth Cord Clamp (Fixed on Valve Stay)

Electrical Box

Connection Hole of Operation Wiring between Outdoor Unit φ26 Knock-out Hole x 2 Seal hermetically the entry of conduit pipe by using putty or etc. (for Water Protection)

Connection Hole of Power Supply Wiring φ70

Power Source Wiring

Operation Wiring between Indoor Units and Outdoor Unit DC 5V (Non-Pole)

Operation Wiring between Outdoor Unit and Outdoor Unit DC 5V (Non-Pole)

Fig. 6.1 Wiring Connection for Outdoor Unit

6.1

General Check

(1) Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data indicated in the Technical Catalog I. Make sure that the components comply with National Electrical Code (NEC).

• Supply electrical power to each outdoor unit. An ELB and knife switch should be used for each outdoor unit.

• Perform electrical wiring by connecting the outdoor unit to the same outdoor unit group indoor unit. Use an ELB and knife switch for each indoor units group.

(2) Check to ensure that the power supply voltage is within ±10% of the rated voltage.

(3) Check the capacity of the electrical wires.

If the power source capacity is too low, the system cannot be started due to the voltage drop.

(4) Check to ensure that the ground wire is connected.

Fix the rubber bushes with adhesive when conduit tubes to the outdoor unit are not used.

21

6.2

Electrical Wiring Connection

6.2.1 For Outdoor Unit The electrical wiring connection for the outdoor unit is shown in Fig. 6.1 (1) Connect the power supply wires to L1, L2, L3, and N (for 380-415V), to R, S and T (for 220V) for the three phase power source on the terminal board and ground wires to the terminals in the electrical control box.

(2) Connect the wires between the outdoor and indoor units to terminals 1 and 2 on the terminal board.

(3) Do not wire in front of the fixing screw of the service panel. If do, the screw can not be removed.

Fix the operation shielded wires between the indoor and outdoor unit with a cord band and ground shielded twist pair cable as shown in the figure.

TB2

Shielded Wire

Press the metal band by pinchers, after inserting the shielded wire to metal band.

22

Metal Band

6.2.2 Electrical Wiring Between Indoor Unit and Outdoor Unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown in Fig. 6.2 and Fig. 6.3.

Check to ensure that the terminal for power source wiring (terminals “L1” to “L1” and “N” to “N” of each terminal board: AC380-415V, terminals “R” to “L1” and “T” to “L2” of each terminal board: AC220V) and intermediate wiring (Operating Line: terminals “1” to “1” and “2” to “2” of each terminal board: DC5V) between the indoor unit and the outdoor unit coincide correctly. If not, some component will be damaged.

(1) Use shielded wires (≥0.75mm2) for intermediate wiring to protect noise obstacle at length of less than 1,000m and size complied with local code.

(2) Open a hole near the connection hole of power source wiring when the multiple outdoor units are connected from one power source line.

(3) The recommended breaker sizes are shown in Table 6.1.

(4) In the case that a conduit tube for fieldwiring is not used, fix rubber bushes with adhesive on the panel.

Max. 1 Outdoor Unit / Power Supply Line

No. 0 System Outdoor Unit TB1 L1 L2 L3 N

TB2 1 2

No. 1 System Outdoor Unit TB1 L1 L2 L3 N

TB2 1 2

No. 3 System Outdoor Unit TB1 L1 L2 L3 N

TB2 1 2

Operating Line (Shielded Twist Pair Cable) DC5V (Non-Pole Transmission H-LINK System)

ELB

Distribution Box or Pull Box *2

ELB

Distribution Box or Pull Box *2

FUSE Main Switch

ELB

3N 380-415V/50 Hz 380V/60 Hz

L1 L2 N

L1 L2 N

TB1

TB1

No. 0 Indoor Unit

1N 220-240V/50 Hz 220V/60 Hz

No. 1 Indoor Unit

Remote Control Cable (Shielded Twist Pair Cable) *1

TB2 1 2 A B

Operating Line (Shielded Twist Pair Cable) DC5V (Non-Pole Transmission H-LINK System)

1 2 A B

Remote Control Switch (PC-P1H)

TB : Terminal Board

Remote Control Cable (Shielded Twist Pair Cable) *1

TB2

Remote Control Switch (PC-P1H)

PCB : Printed Circuit Board : Field Wiring : Field Supplied

No.1 System Indoor Units

No. 0 System Indoor Units (Max. 32 Units per Refrigerant Cycle)

: Optional Accessory

*1: When installing PC-P1H remote control switch in Australia, connect the both ends of shield tube to earth. *2: It is need for Australia.

Fig. 6.2 Instruction for Electrical Wiring Connection (380-415V/50Hz and 380V/60Hz)

Max. 1 Outdoor Unit / Power Supply Line

No. 0 System Outdoor Unit TB1 L1 L2 L3

TB2 1 2

No. 1 System Outdoor Unit TB1 L1 L2 L3

TB2 1 2

No. 3 System Outdoor Unit TB1 L1 L2 L3

TB2 1 2

Operating Line (Shielded Twist Pair Cable) DC5V (Non-Pole Transmission H-LINK System)

ELB

Distribution Box or Pull Box *2

ELB

Distribution Box or Pull Box *2

FUSE Main Switch

ELB

3φ 220V/60 Hz L1 L2 N

L1 L2 N

TB1

TB1

No. 0 Indoor Unit TB2

1φ 220V/60 Hz

1 2 A B

Operating Line (Shielded Twist Pair Cable) DC5V (Non-Pole Transmission H-LINK System) TB : Terminal Board

No. 1 Indoor Unit

Remote Control Cable (Shielded Twist Pair Cable) *1

TB2 1 2 A B

Remote Control Switch (PC-P1H)

Remote Control Cable (Shielded Twist Pair Cable) *1 Remote Control Switch (PC-P1H)

PCB : Printed Circuit Board : Field Wiring : Field Supplied : Optional Accessory

No. 0 System Indoor Units (Max. 32 Units per Refrigerant Cycle)

No.1 System Indoor Units

*1: When installing PC-P1H remote control switch in Australia, connect the both ends of shield tube to earth. *2: It is need for Australia.

Fig. 6.3 Instruction for Electrical Wiring Connection (220V/60Hz) 23

Table 6.1 Electrical Data and Recommended Wiring, Breaker Size/1 Outdoor Unit

Model

RAS-34FSN RAS-36FSN RAS-38FSN RAS-40FSN RAS-42FSN RAS-34FSN RAS-36FSN RAS-38FSN RAS-40FSN RAS-42FSN

Power Supply

220V/60Hz

380-415V/50Hz 380V/60Hz

ELB

Max. Running Current

Power Supply Line

Nominal Current

(A) 115 123 130 138 143 64 68 72 76 79

(mm2) MLFC38SQ MLFC38SQ MLFC50SQ MLFC50SQ MLFC50SQ MLFC22SQ MLFC22SQ MLFC22SQ MLFC22SQ MLFC22SQ

(A) 200 200 200 200 200 125 125 125 125 150

Nominal Sensitive Current (mA) 100 100 100 100 100 100 100 100 100 100

Fuse (A) 125 125 150 150 150 70 70 80 80 80

ELB: Earthleakage Breaker MLFC: Flame Retardant Polyflex Wire

Field Minimum Wire Sizes for Power Source Model RAS-34FSN RAS-36FSN RAS-38FSN RAS-40FSN RAS-42FSN RAS-34FSN RAS-36FSN RAS-38FSN RAS-40FSN RAS-42FSN

Power Source

220V/60Hz

380-415V/50Hz 380V/60Hz

Maximum Current 115 123 130 138 143 64 68 72 76 79

Power Source Cable Size EN60 335-1 *1 -

Transmitting Cable Size

MLFC *2

EN60 335-1 *1

MLFC *2

38mm2 38mm2 50mm2 50mm2 50mm2 22mm2 22mm2 22mm2 22mm2 22mm2

0.75mm2

0.75mm2

* Refer to the NOTES: in the next page for selection of the power source cable size.

NOTES: 1) Follow local codes and regulations when selecting field wires.

2) The wire sizes marked with *1 in the table of this page are selected at the maximum current of the unit according to the European Standard, EN60 335-1. Use the wires which are not lighter than the ordinary tough rubber sheathed flexible cord (code designation H05RN-F) or ordinary polychloroprene sheathed flexible cord (code designation H05RN-F).

3) The wire sizes marked with *2 in the table of this page are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan.

4) Use a shielded cable for the transmitting circuit and connect it to ground.

5) In the case that power cables are connected in series, add each unit maximum current and select wires below.

Selection According to EN60 335-1 Current i (A) Wire Size (mm2) i≤6 0.75 1 6 < i ≤ 10 10 < i ≤ 16 1.5 16 < i ≤ 25 2.5 4 25 < i ≤ 32 32 < i ≤ 40 6 40 < i ≤ 63 10 63 < i *3

Selection According to MLFC (at Cable Temperature of 60oC) Current i (A) Wire Size (mm2) i ≤ 18 0.75 *3: In the case that 18 < i ≤ 24 1.25 current exceeds 63A, 24 < i ≤ 34 2 use MLFC cables.

34 < i ≤ 47 3.5 47 < i ≤ 62 5.5 62 < i ≤ 78 8 78 < i ≤ 112 14 22 112 < i ≤ 147 147 < i ≤ 179 30

Install a multi-pole main switch with a space of 3.5mm or more between each phase.

24

6.3

Dip Switch Setting of Outdoor Unit

NOTE

TURN OFF all power sources before setting.

Without turning OFF, the switches do not work and the contents of the setting are invalid. Mark of “ ” indicates the position of dip switches. Set the dip switches according to the Fig.6.4.

DSW1 Ref. Cycle No. Setting

By using switch DSW4, the unit is started or stopped after 10 to 20 seconds after the switch is operated.

Number this outdoor unit to distinguish from other outdoor units for service and maintenance.

And write the number in the space right.

DSW2 Capacity Setting

Setting is required.

No setting is required.

When wiring connections are H-Link, setting is needed.

Model

ON OFF

Setting Position

1 2 3 4

Unit No.0 Setting Condition

RAS-34FSN

RAS-38FSN

RAS-36FSN

ON OFF

ON OFF

ON OFF 1 2 3 4

1 2 3 4

RAS-40FSN ON OFF

1 2 3 4

RAS-42FSN ON OFF

1 2 3 4

1 2 3 4

Set the unit number of outdoor unit at each refrigerant cycle.

(Setting before shipment is unit 0.)

DSW3 Lift Difference Setting

DSW4 Test Operation and Service Setting

Setting is required.

Setting is required, for test operation and operating the compressor.

* Setting before Shipment * The outdoor unit is located higher than indoor unit.

(0 to 50m) * The outdoor unit is located lower than indoor unit.

(0 to 20m) * The outdoor unit is located lower than indoor unit.

(20 to 40m)

Test Run for Cooling Operation

Setting before Shipment

ON OFF 1 2

ON OFF

ON OFF 1 2 3 4 5 6

ON OFF

* Increasing Heating Capacity

< 50

50 ≤

75 ≤

(

Setting before Shipment ON OFF

ON OFF 1 2

1 2

1 2

Dip Switches Location

SEG2 DSW1 DSW2 DSW4 DSW6

SEG1 DSW3 PSW1 DSW5

220V Setting before shipment ON OFF

ON OFF

ON OFF

ON OFF 1 2 3 4 5 6

No Setting is required.

(m) < 75

Operation for Exchange Compressor

1 2 3 4 5 6

ON OFF 1 2

1 2

(

(

ON OFF 1 2 3 4 5 6 7 8

Setting Item Except No.1 Comp. Operation Except No.2 Comp. Operation Except No.3 Comp. Operation Except No.4 Comp. Operation Except No.5 Comp. Operation Except No.6 Comp. Operation Selection of Input Signal Function Setting

Pin No. #1 #2 #3 #4 #5 #6 #7 #8

Setting is required for cancellation of end resistance.

Setting is required.

415V

Setting before Shipment

DSW10 Transmission Setting

DSW7 Power Supply Setting

Setting is required.

25 ≤

1 2 3 4 5 6

Do not move #3, #5 pins.

DSW6 Refrigerant Piping Length Setting

Actual Piping Length

ON OFF

ON OFF 1 2 3 4 5 6

1 2

Test Run for Heating Operation

Combination of Indoor Units more than 16

1 2 ON OFF

Setting is required, when optional functions are required.

1 2 3 4 5 6

Compressor Forced Stop ON OFF

< 25

DSW5 Emergency Operation or Service Setting

380V Setting before shipment ON OFF

1 2

1 2

(

Setting before Shipment

ON OFF

Cancellation of End Resistance

ON OFF 1 2

Short Circuit of Fuse

ON OFF 1 2

1 2

Push Switches

PSW2

PSW1

Manual Defrost

PSW2

Checking by

PSW3

7-Segment

PSW3

DSW7

DSW10

Fig. 6.4 DSW Setting

25

• Setting for Transmitting It is required to set the refrigerant cycle Nos. and end terminal resistance for this H-link system.

• Setting of Refrigerant Cycle No. In the same refrigerant cycle, set the same refrigerant cycle No. for the outdoor unit and the indoor units as shown below.

H-LINK Connection DSW1

ON 1 2 3 4 OFF

No.0 Unit Set each outdoor unit from No. 0, 1, 2, etc. at site. (factory set: No. 0) • Setting of End Terminal Resistance Before shipment, No. 1 pin of DSW10 is set at the “ON” side. In the case that the outdoor units quantity in the same H-link is 2 or more, set No. 1 pin of DSW10 at the “OFF” side from the 2nd unit. If only one outdoor unit is used, no setting is required.

Unit No.

Setting

Unit No.

Setting

0

ON 1 2 3 4 OFF

8

ON 1 2 3 4 OFF

1

ON 1 2 3 4 OFF

9

ON 1 2 3 4 OFF

2

ON 1 2 3 4 OFF

10

ON 1 2 3 4 OFF

3

ON 1 2 3 4 OFF

11

ON 1 2 3 4 OFF

4

ON 1 2 3 4 OFF

12

ON 1 2 3 4 OFF

5

ON 1 2 3 4 OFF

13

ON 1 2 3 4 OFF

6

ON 1 2 3 4 OFF

14

ON 1 2 3 4 OFF

7

ON 1 2 3 4 OFF

15

ON 1 2 3 4 OFF

Setting of End Terminal Resistance DSW10 Before Shipment Cancellation

ON 1 2 OFF

26

ON 1 2 OFF

• Indoor Unit Quantity Smaller than 16 (including 16) Central Station, PSC-5C, CS-NET

Outdoor Units

Set Dip SW to the same Refrigerant Cycle No.

Indoor Units Remote Control Switch

NOTE: Refrigerant System setting is available on the following dip switches.

Outdoor Unit: DSW1 Indoor Unit: DSW5 • Indoor Unit Quantity more from 17 to 32 As indoor unit No. setting is currently available up to 16. Therefore, the following setting is required.

(1) Set No.5 pin of DSW4 at the “ON” side in the outdoor unit PCB. (2) Regarding indoor units Nos. up to 16, set the same refrigerant system No. of the outdoor unit.

(3) Regarding indoor unit Nos. from 17 to 32, set the refrigerant system No. by adding 1(one) to the above (2).

If not set, malfunction will occur.

NOTE: Do not use the above refrigerant system No. in other refrigerant systems. <Dip Switch Setting Example (32 Indoor Units)> DSW4 1) Set No.5 of DSW4 to "ON".

1 2 3 4 5 6 Central Station, PSC-5S, CS-NET

2) Set Dip SW to the same Refrigerant Cycle No.

3) Set Dip SW to the same Refrigerant Cycle No. +1

Indoor Units Remote Control Switch Up to 16

Remote Control Switch from 17 to 32

NOTE: In the case that indoor unit quantity is greater than 16 (excluding 16), count one outdoor unit as two units.

27

â&#x20AC;¢ Function Setting

Turn OFF all power source before setting.

SLo Defrost Setting

Start

Not Available

PSW1

SET

Turn ON DSW4 - No.4 Turn ON DSW5 - No.8

The next indication is shown by pressing PSW. PSW2: PSW3:

Cancellation of Outdoor Hot-Start Limit.

SET Not Prepared

END of Setting

Write the set function number in the below space.

Circulator Function at Heating Thermo-OFF

Not Available

Not Available

Available

Long Piping Setting

Not Available

SET

Available

Low Noise Setting

Not Available

PSW1

SET

Available

Fixing of Demand Function

Not Available

PSW1

Cancellation of Outdoor Ambient Temp.

Limit of Cooling

SET

Available

Not Available

Wave Function Setting

Not Available

PSW1 Available

Not Available

PSW1 Available

Change of Defrost Condition

Not Available

PSW1

SET Preventing Cold Air Blowing of Cooling

SET Not Prepared

PSW1

28

PSW1

Available

SET

SET

Not Available

SET

PSW1

Night-Shift (Low Noise)

SET

Available

SEG1

Available

Cancellation of Outdoor Ambient Temp.

Limit of Heating

PSW1

PSW1

SET

SET

Not Available

PSW1

Turn OFF DSW5 - No.8 Turn OFF DSW4 - No.4

SEG2

Available

Available

SET

Available

Not Available

PSW1 Available

Not Available

â&#x20AC;¢ Selection of Input Signal Setting Table SEG1

Turn OFF all power source before setting.

Start

Turn ON DSW4 - No.4 Turn ON DSW5 - No.7

The next indication is shown by pressing PSW. PSW2: PSW3:

Input

Output

Fixing Heating Mode

Operation Signal

Fixing Cooling Mode

Alarm Signal

Demand

Comp. ON Signal

Outdoor Fan Run

Defrost Signal

Forced Stoppage

-

Demand (Current Limit 60%)

-

Demand (Current Limit 70%)

-

Demand (Current Limit 80%)

-

Demand (Current Limit 100%)

-

Do not set same function to multiple input port.

END of Setting

Turn OFF DSW5 - No.7 Turn OFF DSW4 - No.4 Input Setting 3 CN18 1-2

Write the set function number in the below space.

PSW1

Setting Details are according to Setting Table.

SEG2 Input Setting 1 CN17 1-2

SEG1

Factory Setting

SET Output Setting 1 CN16 1-2

PSW1

SET Input Setting 2 CN17 2-3

Factory Setting

PSW1

SET Factory Setting

Output Setting 2 CN16 1-3

Factory Setting

PSW1

PSW1

SET

Factory Setting

SET

29

7.

Test Run

Test run should be performed according to the Table 7.2. And use the Table 7.1 for recording test run.

Do not operate the system until all the check points have been cleared.

(A) Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to the same refrigerant cycle.

If not, it will cause an abnormal operation and a serious accident.

(B) Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired.

(C) Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system.

(D) Check to ensure that the switch on the main power source has been ON for more than 12 hours, to warm the compressor oil by the oil heater.

(E) Check that the refrigerant piping and the electrical wiring conform to the same system, and check that the dip switch setting of the refrigerant cycle No. (DSW1 [O.U.], DSW5 [I.U.]) and the unit number (RSW) for the indoor units apply to the system.

Confirm that the dip switch setting on the printed circuit board of the indoor units and the outdoor units are correct.

Especially, pay attention to the setting of lift between indoor units and outdoor unit, the refrigerant No. and the end terminal resistance. Refer to the chapter “6. ELECTRICAL WIRING”.

(F) Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired. Do not impress the voltage on the terminals for transmission 1 and 2.

30

(G) Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system.

(H) Check to ensure that each wire, L1, L2, L3 and N (R, S and T) is correctly connected at the power source.

If incorrectly connected, the unit will not operate and the remote control switch will indicate the alarm code “05”. In this case, check and change the phase of the power source according to the attached seat on the reverse side of the service cover.

(I) Check to ensure that switch on the main power source has been ON for more than 12 hours, to warm the compressor oil by the oil heater.

FSN series does not operate within 4 hours after power supply (Stoppage Code d1-22).

In case of operating within 4 hours, release the protection control as follows: 1. Supply power to the outdoor unit and indoor units.

2. Wait for 30 seconds.

3. Push PSW1 on PCB more than 3 seconds.

Pay attention to the following items while the system is running.

(A) Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side are heated higher than 90°C. (B) DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). It will cause a serious accident.

Do not touch any electrical components at least 3 minutes after turning OFF the main switch.

Check that the refrigerant piping setting and electrical wiring setting are for the same system, by operating the indoor unit one by one.

Caution for Insulation Resistance If total unit insulation resistance is lower than 1 megohm, the compressor insulation resistance may be low due to retained refrigerant in the compressor. This may occur if the unit has not been used for long periods.

1. Disconnect the cables to the compressor and measure the insulation resistance of the compressor itself. If the resistance value is over 1 megohm, then insulation failure has occurred of other electrical parts.

2. If the insulation resistance is less than 1 megohm, disconnect the compressor cable from the inverter PCB. Then, turn on the main power to apply current to the crankcase heater.

After applying current for more than 3 hours, measure insulation resistance again. (Depending on the air conditions, pipe length or refrigerant conditions, it may be necessary to apply the current for a longer period of time.) Check the insulation resistance and reconnect the compressor.

If the leakage breaker is activated, check the recommended size shown in Table 6.1.

NOTE 1. Confirm that field-supplied electrical components (main switch fuse, fuse-free breaker, earthleakage breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data given in the Technical Catalog I of the unit and ensure that the components comply with national and local codes.

2. Use shielded wires (≥0.75mm2) for field wiring to protect noise obstacle. (Total length of shielded wire shall be less then 1000m, and size of shielded wire shall comply with local codes.)

3. Check to ensure that the terminal for power source wiring (terminals “L1” to “L1” and “N” to “N” of each terminal board: AC380-415V, terminals “R” to “L1” and “T” to “L2” of each terminal board: AC220V) and intermediate wiring (Operating Line: terminals “1” to “1” and “2” to “2” of each terminal board: DC5V) between the indoor unit and the outdoor unit coincide correctly. If not, some component will be damaged.

31

Table 7.1 Test Run and Maintenance Record MODEL:

SERIAL. No.

COMPRESSOR MFG. No.

CUSTOMER'S NAME AND ADDRESS:

DATE:

1. Is the rotation direction of the indoor fan correct?

2. Is the rotation direction of the outdoor fan correct?

3. Are there any abnormal compressor sounds?

4. Has the unit been operated at least twenty (20) minutes?

5. Check Room Temperature Inlet: No. 1 DB /WB Outlet: DB /WB Inlet: No. 5 DB /WB Outlet: DB /WB

o

C, C, o C, o C, o

6. Check Outdoor Ambient Temperature o Inlet: DB C, o Outlet: DB C,

No. 2 DB DB No. 6 DB DB

/WB /WB /WB /WB

WB WB

7. Check Refrigerant Temperature Liquid Temperature: Discharge Gas Temperature:

No. 3 DB DB No. 7 DB DB

/WB /WB /WB /WB

o

C, C, o C, o C,

No. 4 DB DB No. 8 DB DB

V,

L2-L3

o

/WB /WB /WB /WB

o

C C o C o C o

o

C C

o

C C

o

MPaG MPaG

9. Check Voltage Rated Voltage: Operating Voltage: Starting Voltage:

L1-L2 1-

V V, V

V = Vm

10. Check Compressor Input Running Current Input: Running Current: 11. Is the refrigerant charge adequate?

12. Do the operation control devices operate correctly?

13. Do the safety devices operate correctly?

14. Has the unit been checked for refrigerant leakage?

15. Is the unit clean inside and outside?

16. Are all cabinet panels fixed?

17. Are all cabinet panels free from rattles?

18. Is the filter clean?

19. Is the heat exchanger clean?

20. Are the stop valves open?

21. Does the drain water flow smoothly from the drain pipe?

32

C, C, o C, o C, o

o

8. Check Pressure Discharge Pressure: Suction Pressure:

Phase Imbalance:

o

kW A

L1-L3

V

Table 7.2 Checking of Wire Connection by Test Run (1) Turn ON the power source of the indoor and outdoor units.

(2) Set the TEST RUN mode by the remote control switch.

Counting Number of Connected Units

Depress the "MODE" and the "CHECK" switches simultaneously for more than 3 second.

SET TEMP.

HIGH COOL

UNIT

A/C CHECK

RUN / STOP

TEMP.

Operation Lamp If "TEST RUN" and the counting number of the connected units to the remote control switch (for example "05") are indicated on the remote control switch, the connection of remote control cable is correct.

ON/OFF TIMER

MODE FAN SPEED

RESET

MODE VENTI LOUVER

CHECK TIME

CHECK

If no indication or "00" appears or the number of the units indicated is less than the actual number of the units, some abnormalities exist.

Remote Control Switch

(3) Remote Control Switch Indication No Indication

Inspection Points after the Power Source OFF

Fault * The power source is not turned ON. * The connection of the remote control cable is incorrect.

1. Connection between Connector and Wires 2. Connecting Points of Remote Control Cable 3. Contact of Connectors of Remote Control Cable

* The connecting wires of power supply line are incorrect or loosened.

4. Connection Order of each Terminal Boards 5. Screw Fastening of each Terminal Boards

* The setting of unit number is incorrect.

Counting * The connection of control cables between number of each indoor units are incorrect. connected units (When one remote control switch controls is incorrect.

6.

7.

8.

9.

Dip Switch Setting on Printed Circuit Board Wire Connecting Order of Bridge Cable Connecting Points of Bridge Cable Contact of Connectors of Bridge Cable

multiple units.)

Back to (1) after checking (4) Select TEST RUN MODE by depressing MODE switch. (COOL or HEAT) (5) Depress RUN/STOP switch.

The "TEST RUN" operation will be started. (The "TEST RUN" operation will be finished after 2 hours unit operation or by depressing the RUN/STOP switch again.)

If the units do not start or the operation lamp on the remote control switch is flashed, some abnormalities exist.

(6) Remote Control Switch Indication The operation lamp flashes. (1 time/1 sec.)

And the Unit No. and Alarm Code "03" flash.

Unit Condition The unit does not start.

Inspection Points after the Power Source OFF

Fault The connecting wires of operating line are incorrect or loosened.

1. Connecting Order of each Terminal Boards.

The fuse on the PCB may be blown out due to miswiring. (Can be recovered only once by the DSW on the PCB)

Procedures for Recovery When Transmitting Circuit Fuse is Blown Out 1. Correct the wiring for the terminal board.

2. Setting position of the model code are shown below.

Indoor PCB DSW7 RPK-0.8 to 1.5 ON ON OFF

RPK-2.0

OFF

1 2 RCI, RCD, RPI, RPC, RPK-2.5 to 4.0, RPF(I)

ON OFF

Outdoor PCB DSW10 ON OFF 1 2

1 2

2. Screw Fastening of each Terminal Boards.

3. Connecting Order of Power Line Between Indoor Units and Outdoor Unit.

The operation lamp flashes. (1 time/2 sec.)

The unit does not start.

The connection of remote control cable is incorrect.

This is the same as item (3)-1, 2 and 3.

Indication of flash different to above.

The unit does not start, or starts once and then stops.

The connection of the thermistors Check by the alarm code table in the service or other connectors are incorrect. manual. (Do it by service people.)

Tripping of protector exists, or else.

The operation lamp flashes. (1 time/1 sec.)

And the Unit No. 00.

Alarm Code dd and Unit Code E.00 flash.

The unit does not start.

The connecting wires of operating line are incorrect or loosened.

Check by the alarm code table in the service manual. (Do it by service people.)

Back to (1) after checking

33

Table 7.3 Alarm Code Code No.

Category

01

Indoor Unit

Tripping of Protection Device

02

Outdoor Unit

Tripping of Protection Device

03

Transmission

Abnormality between Indoor and Outdoor (or Indoor)

04

Inverter

04 *

Transmission

05 06

Voltage Drop

Content of Abnormality

Inverter Trip of Outdoor Unit Abnormality of Fan Controller Abnormality of Power Source Wiring Voltage Drop in Outdoor Unit Excessively Low or High Voltage to Outdoor Unit Decrease in Discharge Gas Superheat

07 Cycle

Increase in Discharge Gas Temperature

08 09 11 12 13 14 19 21 22 23 24 29 31

Outdoor Unit

Sensor on Indoor Unit

Sensor on Outdoor Unit

Abnormal Transmission of Other Indoor Unit

32 35

Tripping of Protection Device Inlet Air Thermistor Outlet Air Thermistor Freeze Protection Thermistor Gas Piping Thermistor Tripping of Protection Device High Pressure Sensor Outdoor Air Thermistor Discharge Gas Thermistor Evaporating Thermistor Low Pressure Sensor Incorrect Setting of Outdoor and Indoor Unit

System

38 39 43 44 Pressure 45 47 51

Incorrect Setting in Indoor Unit No. Abnormality of Protective Circuit in Outdoor Unit Abnormality of Running Current at Constant Compressor Pressure Ratio Decrease Protection Activating Low Pressure Increase Protection Activating High Pressure Increase Protection Activating Low Pressure Decrease Protection Activating Abnormality of Current Sensor for Inverter Thermal Protection Activating Overcurrent Protection Activating

52 Inverter 53

IPM Protection Activating

54

Increase in Inverter Fin Temperature

56

Abnormality of Detection for Fan Motor Position

57

Outdoor Fan

58 dd**

Fan Controller Protection Activating Abnormality of Fan Controller

Transmission

Incorrect Wiring between Indoor Units

EE Compressor Compressor Protection * The indication flashes. ** In case of PC-P1H.

34

Leading Cause Failure of Fan Motor, Drain Discharge, PCB, Relay.

Failure of Compressor, Refrigerant Quantity, Inverse Phase.

Incorrect Wiring. Failure of PCB. Tripping of Fuse.

Failure in Transmission of PCB for Inverter.

Failure in Transmission between Fan Controller and Inverter.

Reverse Phase Incorrect Wiring.

Voltage Drop. Incorrect Wiring.

Tripping of Fuse.

Excessive Refrigerant Charge.

Failure of Thermistor, Wiring.

Insufficient Refrigerant.

Failure of Thermistor, Wiring.

Failure of Fan Motor, Incorrect Wiring.

Failure of Thermistor, Sensor, Connection.

Failure of Fan Motor, Incorrect Wiring.

Failure of Thermistor, Sensor, Connection.

Incorrect Setting of Capacity Code.

Failure of Power Supply, PCB in Other Indoor Unit.

Existence of the same Indoor Unit No. Incorrect Connection to PCB in Outdoor Unit.

Incorrect Wiring.

Failure of Compressor, Inverter, Power Supply.

Overload to Indoor in Cooling.

High Temperature or Outdoor Air. Overload Operation.

Excessive Refrigerant.

Vacuum Condition in Cycle Failure of Expansion Valve. Insufficient Refrigerant.

Failure of Current Sensor.

Overload, Overcurrent, Locking to Compressor.

Overcurrent, Low Voltage, Overheating of Inverter Parts.

Abnormal Inverter Fin Thermistor, Abnormal Outdoor Fan. Abnormal Detection Circuit of Transmission.

Overcurrent, Abnormal Fan Controller Fin. Abnormal Fan Speed.

Incorrect Wiring between Indoor Units and Remote Control Switch.

Failure of Compressor.

8.

Safety and Control Device Setting

• Compressor Protection The compressor is protected by the following devices and their combinations.

(1) High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.

(2) Oil Heater: This band type heater protects against oil foaming during cold starting, as it is energized while the compressor is stopped.

• Fan Motor Protection Internal Thermostat: Embedded in the fan motor winding, this internal thermostat cuts out the operation of the fan motor when the fan motor winding temperature exceeds the setting.

RAS-34FSN RAS-40FSN RAS-36FSN RAS-42FSN RAS-38FSN Automatic Reset, Non-Adjustable

Model For Compressor Pressure Switches Cut-Out

MPa

(each one for each compressor) -0.05 -0.05 4.15 4.15 -0.15 -0.15

Cut-In

MPa

3.20+0.15

3.20+0.15

A

60 x 10

60 x 12

A

40 x 2 + 32 x 8

40 x 2 + 32 x 10

Capacity

W

40 x 7

40 x 8

CCP Timer Setting Time

min.

3

High

Fuse Capacity 3φ 220V/60Hz 3φ 380-415V/50Hz 3φ 380V/60Hz Oil Heater

Non-Adjustable

For Condenser Fan Motor Internal Thermostat

Automatic Reset, Non-Adjustable (each one for each motor) C

130+5

130+5

C

83+15

83+15

A

12

12

Cut-Out

o

Cut-In

o

For DC Fan Module Fuse Capacity

3

35

9.

Common

9.1

Installation Space Air Outlet

(1) Basic Space Rear Air Intake Space

Min. 300mm

Front Air Intake Space

Min. 600 to *900mm

Air Inlet

Top View

Side View

*) A space of 900mm is recommended for easier service work.

(2) Installation Space for Single Unit (a) In case that the front side and either of the sides are open.

No Limit to Wall Height

Mi

n.

0mm

. 30

Min

10

mm

â&#x20AC;˘ In case that the surrounding wall exists.

No Limit to Wall Height Min. 300 + h1/2 mm

h1 (mm) Min. 10mm

Front

Min. 10mm

500mm h2 (mm)

Min. (600 to *900)+ h2/2 mm

Min. 1500mm

Min. 300 + h1/2 mm Min. (600 to *900)+ h2/2 mm

Top View *) A space of 900mm is recommended for easer service work.

â&#x20AC;˘ In case that the upper side obstacles exists.

A = Min. 1500mm

Open Space

Open Space

Surrounding space; front, rear, left & right sides should be open

In case that dimension A is shorter than 1500mm or the surrounding space of the unit is not open, provide the air outlet duct to prevent the air short-circuiting. See the item 9.1 (3) to (7) for further information.

36

(3) Multiple Installation Space Keep the upper side open to prevent air short-circuiting. (a) In case that the front and either of the sides are open.

1 Installation in the same Direction (Top View)

No Limit to Wall Height Min. 900mm

Front Min. 500mm

Min. 10mm Front

Min. 20mm

Provide a distance of min.1000mm to the next unit.

Min. 1000mm

Min. 20mm

Min. 500mm

Min. 900mm

Min. 10mm

Max. 2 Units in a row

2

Rear to Rear Installation (Top View)

No Limit to Wall Height

Min. 900mm

Front Min. 900mm

Min. 10mm

Min. 20mm Front Min. 20mm

Provide a distance of min.1000mm to the next unit.

Min. 900mm

Min. 1000mm

Min. 900mm Min. 10mm

Max. 2 Units in a row

37

(b) In case that the surrounding wall exists.

1 Installation in the same Direction

No Limit to Side Wall Height

(Top View) Min. 300 + h1/2 mm

h1 (mm)

Min. 20mm

Min. 10mm

Min. 10mm Front

Min. 900mm

500mm h2 (mm) Min. 300 + h1/2 mm

1500mm

Min. 20mm

Min. 10mm

Min. 10mm

Front Min. (600 to *900)+ h2/2 mm

Min. 900mm Min. (600 to *900)+ h2/2 mm *) A space of 900mm is recommended for easier service work.

2

Max. 2 Units in a row

Rear to Rear Installation (Case 1)

(Top View)

No Limit to Side Wall Height

Min. (600 to *900)+ h2/2 mm

h2 (mm)

1500mm Min. 400mm

Min. 200mm Min. 900mm

h2 (mm) 1500mm

Min. (600 to *900)+ h2/2 mm Min. 900mm Min. (600 to *900)+ h2/2 mm

Min. 200mm

Min. 400mm Front Min. (600 to *900)+ h2/2 mm

*) A space of 900mm is recommended for easier service work.

Max. 2 Units in a row

38

Min. 200mm

Front

Min. 200mm

3

Rear to Rear Installation (Case 2)

No Limit to Side Wall Height

(Top View)

Min. (600 to *900)+ h2/2 mm

h2 (mm)

1500mm Min. 20mm

Min. 10mm

Min. 10mm Front

Min. 1600mm

h2 (mm) Min. (600 to *900)+ h2/2 mm 1500mm

Min. 20mm

Min. 10mm

Min. 1600mm

Min. 10mm

Front Min. (600 to *900)+ h2/2 mm

Min. (600 to *900)+ h2/2 mm *) A space of 900mm is recommended for easier service work.

Max. 2 Units in a row

4

Rear to Rear Installation (Case 3)

No Limit to Side Wall Height

(Top View)

Fence (Field-Supplied) Min. (600 to *900)+ h2/2 mm

h2 (mm) Min. 20mm

Min. 10mm

1500mm

Min. 10mm

h2 (mm)

Min. (600 to *900)+ h2/2 mm 1500mm

Min. 10mm Front

Min. 900mm

Min. 20mm

Min. 10mm

Front Min. (600 to *900)+ h2/2 mm

Min. 900mm Min. (600 to *900)+ h2/2 mm

Max. 2 Units in a row

*) A space of 900mm is recommended for easier service work.

*) In case that the rear space is less than 1600mm and the side space is less than 400mm, apply a field-supplied fence for each unit. Refer to the explanation of the hood on the item 9.1 (8).

Fence

Min. 300mm

Min. 300mm

NOTE: there are three(3) air outlets.

39

(4) Serial Installation Space (a) In case that the front and either of the sides are open.

No Limit to Wall Height

No Limit to Wall Height

Min. 20mm

Min. 10mm

Min. 20mm Min. 400mm

Min. 300mm

Provide a distance of min.1000mm to the next unit.

Min. 900mm

No Limit to Number of Units

Max. 2 Units in a row

(b) In case that the surrounding wall exists.

No Limit to Wall Height

(Top View) Min. 300 + h1/2 mm

h1 (mm) 500mm

Min. 10mm

Min. 10mm Min. 20mm

h2 (mm) Min. 300 + h1/2 mm

Min. (600 to *900)+ h2/2 mm

Min. 1500mm Min. (600 to *900)+ h2/2 mm *) A space of 900mm is recommended for easier service work.

40

Max. 2 Units in a row

(5) Consideration to Seasonal Wind Avoid the installation that the air intake side (Rear) of the unit is faced directly against a seasonal strong wind.

Correct Windbreak Fence

Seasonal Wind Air Intake Side (Rear)

Incorrect Seasonal Wind

Air Intake Side (Rear)

Min. 300mm

Correct

Air Intake Side (Rear)

Air Intake Side (Rear)

(In this case, defrosting time extends.)

(6) Consideration to Snow Apply an air discharge hood, an air intake hood and a higher foundation to prevent accumulation of snow on the air outlet and air inlet.

Incorrect

Correct Air Discharge Hood (Field-Supplied) Seasonal Wind

Seasonal Wind

Air Intake Hood (Field-Supplied)

Foundation Height with a consideration to a snowfall.

NOTES: 1. See the item 9.1 (8) for the reference of the dimension of the hood.

2. Install the unit on a sunny place such as east or south side of the building rather than north side.

(7) Prevention of Short-circuiting For prevention of short-circuiting between suction air and discharge air, apply a field-supplied air discharge hood shown in the item 9.1 (8).

Air Discharge Hood (Field-Supplied) 600 to 900mm

Max. 500mm

300mm (Rear Side Space)

Example Figure

41

(8) Dimensions of the Hood (Field-Supplied) • Following figures show the recommended dimensions of air discharge hood and air intake hood for the outdoor unit.

• Apply steel plate of thickness 1mm for hood part, and of thickness 1.6mm for flange part and stay part.

• Apply steel plate with holes for hood part of air intake hood.

• Apply munsell code 1.0Y 8.5/0.5 beige color for painting the hood • Apply M5 tapping screws for fixing the hood.

• Reinforce the hood with supports, if they are necessary in consideration of the weather such as a strong wind.

Snow Protection Hood 3346

7

758

6

7

6

7

5

1

4

2

789

3 11 13

1206

1220

10

9

3328

No.

This Snow Protection Hood is field-supplied.

The details on the specifications are found in Technical Bulletin. Please contact your local agent, as the occasion arises.

Part Name

964

Q'ty

1

Right Side Plate

1

2

Left Side Plate

1

3

Front Panel 1

3

4

Front Panel 2

3

5

Front Panel 3

3

6

Center Pole

2

7

Side Plate

3

8

Left Fixing Plate for Front

1

9

Right Fixing Plate for Front

1

10 Center Fixing Plate for Front

2

11 Left Fixing Plate for Rear

1

12 Right Fixing Plate for Rear

1

13 Center Fixing Plate for Rear

2

Details of Slotted Hole 7

R

1184

12

1220

R

4-Slotted Hole

10

924

58

59 4-Slotted Hole

200

8

12

13

Rear Suction Hood Enlarged View of A 205

507

377

205

7

3

A

4-Slotted Hole

400

4-Slotted Hole

2 6

8

4

1192

1192

932

28

1

28 3389

400

7

φ15

1086

4-φ6.5

R

9

27

7

9

400

5

Details of Slotted Hole

364 R

507

12

507

R

205

8.5

494

No.

Part Name Right Plate

1

2

Left Plate

1

3

Right Upper Front Plate

1

4

Right Lower Front Plate

1

5

Left Upper Front Plate

1

6

Left Lower Front Plate

1

7

Center Up Front Plate

1

8

Center Lower Front Plate

1

9

Center Pole

2

Right and Left Suction Hood A

Enlarged View of A

7

12

R

400

R

7

4

Details of Slotted Hole

8.5

3

400

R

φ15

1012

2-Slotted Hole 2 Locations

2

1

360 200

42

380

No.

Part Name

Q'ty

1

Q'ty

1

Right Plate

1

2

Left Plate

1

3

Upper Front Plate

1

4

Lower Front Plate

1

Attaching Example of Snow Protection Hood

3346

758 Snow Protection Hood

A

Left Suction Hood

B

Right Suction Hood

2330

Rear Suction Hood

Safety Wiring Rope to Prevent Overturning

200

3390

200

750

Enlarged View of A

2-Fixing Screw

400

Outdoor Unit

Enlarged View of B 4-Fixing Screw 2-Fixing Screw

2-Fixing Screw

4-Fixing Screw 2-Fixing Screw

Fixing Screw *2-Fixing Screw

*3-Fixing Screw

*3-Fixing Screw

Fixing Screw

*2-Fixing Screw

Before attaching the Snow Protection Hood, remove marked with "*" screws of the unit and use them when fixing the Snow Protection Hood as in the figure.

43

9.2

Piping System and Multi-kit

(1) A maximum piping length of 150 meters and maximum lift of 50 meters between indoor units and outdoor unit is applicable.

(2) Utilizing the SD (suction/discharge air temperature) control to maintain the most appropriate refrigerant flow, a maximum lift of 50 meters, which is almost equivalent to the floor height, between indoor units is available.

9.2.1 Piping System Example The “Down-Size Piping System” is available for piping cost reduction.

Line Branch 2 (Down-Size Piping) < Outdoor Unit to First Branch > Outdoor Unit Capacity

Gas/Liquid (φmm) Equivalent Piping Length < 100m Equivalent Piping Length >100m *1)

34HP

31.75/19.05

38.1/22.2

36 to 42HP

38.1/19.05

44.45/22.2

< Multi-kit to Indoor Unit > Pipe Size Indoor Unit Capacity 0.8 to 1.5HP

12.7/6.35 *2)

2HP

H1

Gas/Liquid (φmm)

2.5 to 5HP

Max. Length of Liquid Pipe 15m

15.88/6.35 *2)

15m

15.88/9.53

30m

*2): In the case that liquid piping length is longer than 15m, use φ9.53 pipe and reducer (field-supplied).

Indoor Unit

< First Branch >

Indoor Unit

H2

Outdoor Unit Capacity

Multi-Kit

34 to 42HP

E-302SN

Indoor Unit

Indoor Unit

Indoor Unit L3

Indoor Unit

L3

L3

L3

L3

L3 L2

L1

< Piping Size and Multi-kit after First Branch > Total I. U. Capacity in HP

Gas/Liquid (φmm)

36~

38.1/19.05

26~35.99

31.75/19.05

18~25.99

28.6/15.88

16~17.99

28.6/12.7

12~15.99

25.4/12.7

Multi-kit Model E-302SN

Item Ref. Pipe Length: L1

Actual Equivalent

Applicable Range within 150m within 175m

Piping Length from 1st Branch to each I. U.: L2

within 40m

E-162SN

Piping Length from each Multi-kit to I. U.: L3

within 30m within 50m

E-242SN

9~11.99

22.2/9.53

E-102SN

Lift between

O. U. is Higher

6~8.99

19.05/9.53

E-84HSN *3)

I. U. and O. U.: H1

O. U. is Lower

lower than 6

15.88/9.53

E-108HSN *3)

Lift between Indoor Units: H2

within 15m

Total Actual Length of Liquid Pipes

within 300m

*3) Total I. U. Capacity in HP

Number of Branches

5~10

8 branches

E-108HSN

5~8

4 branches

E-84HSN

within 40m

Multi-kit

G In the case that the selected multi-kit size is bigger than that of the first branch, use the same size as the first branch.

G In the case that the selected pipe size after the first branch is bigger than the pipe size before the first branch, use the same size as before the branch.

G If the pipe length from the O.U. to the first branch is more than 100m, the pipe size must be increased (refer to *1)).

In this case, the pipe size from the first branch to the second branch should be selected according to the original pipe size.

44

9.2.2 Directions for Refrigerant Piping Work (1) Total System of SET-FREE (FSN Series) Outdoor Unit

Outdoor Unit

Gas/Liquid (Ď&#x2020;mm) Outdoor Unit Equivalent Piping Length < 100m Equivalent Piping Length >100m RAS-34FSN

31.75/19.05

38.1/22.2

RAS-36FSN, RAS-38FSN RAS-40FSN, RAS-42FSN

38.1/19.05

44.45/22.2

Height Difference between Indoor Units and Outdoor Unit

*Refer to the next page.

Max. 50m (When the outdoor unit is installed lower than the indoor unit.)

Max. 40m

Actual Length: Max. 150m (Equivalent Length: Max. 175m)

Height Difference between Indoor Units Max. 15m

Install Multi-kits Horizontally Max. 40m

ATTENTION 1. The liquid piping and the gas piping shall be the same piping length and run along the same route.

2. Install multi-kit as close to the indoor unit as possible.

3. The HITACHIâ&#x20AC;&#x2122;s multi-kits (Optional Accessory as system parts) shall be used for the branch pipe to the indoor unit.

4. Install multi-kits at the same horizontal level.

45

(2) Applicable Height Difference According to Piping Length NOTES: 1. Piping: The piping sizes are as shown below (* Conditions).

2. DSW: Dip Switch on Outdoor Unit PCB1 (DSW3 shall be set when the outdoor unit is installed lower than indoor unit with height difference over 20m and when longer piping is required.)

50 Height Difference (m)

40 30

When the outdoor unit is installed higher than the indoor unit

20 10 0

Total length between outdoor unit and each indoor units.

50

When the outdoor unit is installed lower than the indoor unit

-10 -20 -30

ng

100

150

tti se 3 .

W ed DS g e an th ch e e er b wh d to e e ng uir Ra req is

Piping Length (m)

(Refer to FIg.2)

-40

*Conditions: Diameter of Liquid Piping: Ď&#x2020;19.05

Dip Sw3: Not Set (Factory-Supplied) Dip Sw3: Set ON OFF

1

2

Fig. 1

50 Height Difference (m)

40 30

When the outdoor unit is installed higher than the indoor unit

20 10 0

Total length between outdoor unit and each indoor units.

50

When the outdoor unit is installed lower than the indoor unit

100

150

Piping Length (m)

-10 -20 -30

Range where the DSW3 setting is required to be changed.

-40

*Conditions: Diameter of Liquid Piping: Ď&#x2020;22.2

Dip Sw3: Not Set (Factory-Supplied) Dip Sw3: Set ON OFF

Fig. 2 46

1

2

9.2.3 Distribution Method (1) Line Distribution With line distribution method, it is possible to make the first or the second main pipe distribution within the third branch. And do not make the main pipe distribution, at or after the fourth branch. (a) Branch Method Correct

3rd

(recommended)

Incorrect

3rd

2nd OU

2nd

OU

1st

1st

Incorrect

Correct

Incorrect

(acceptable)

OU

2nd

3rd

OU

1st

3rd

2nd

4th

1st

1st

1st

2nd

Main Pipe Distribution

2nd

Main Pipe Distribution

Main Pipe Distribution

Main Pipe Distribution

Incorrect

Main Pipe Distribution: Distribution from One Multi-kit to Two Multi-kits (b) Installation Position 1 Horizontal Installation â&#x20AC;˘ Locate the branch pipes on the same horizontal plane. â&#x20AC;˘ Make the straight length a minimum of 0.5m after the vertical bend.

Correct

Incorrect

Upward

Upward

Straight Length Min. 0.5m

Downward

Downward

A

Max. 30o o

30

Keep horizontal.

Maximum inclination no more than 30o

2

Inclination

View from A

Vertical Installation Correct

Correct

Upward Branch

Downward Branch

Upward

Upward Straight Length Min. 0.5m

Straight Length Min. 0.5m Downward

Downward

47

(2) Header Distribution (a) Branch Method Do not connect two header branches consecutively.

Incorrect

Indoor Unit

Header

Correct

Header Main Pipe Main Pipe

Indoor Unit Main Pipe

Header

(b) Installation Position Install the header horizontally.

To Outdoor Unit

Gas Piping Horizontally

Liquid Piping

Horizontally

To Indoor Unit To Outdoor Unit

To Indoor Unit

Seal the end of branch pipes which are not connected, by brazing factory-supplied closing pipes.

(3) Combination Branch â&#x20AC;˘ It is possible to connect the header to the second line branch, when the first branch is also the line branch. â&#x20AC;˘ Do not connect a line branch to a header branch.

Correct

Correct

Incorrect

Max. 40m Line Branch (First Branch)

Line Branch (First Branch)

Header Second Branch Header Indoor Unit Line Branch

Max. 40m

48

Header

9.2.4 Installation (1) Piping Connection When connecting liquid piping for the unit with a capacity of 0.8HP to 2.0HP where the piping length is 15 meters or longer, apply a liquid piping size of Ď&#x2020;9.53. Fix the connecting pipe as shown in the following figure. Utilize the insulation attached to the indoor unit.

1. Slide the flare nut onto the connecting pipe.

2. Flare the tip of the connecting pipe.

3. Connect the pipes with the flare nut.

Fixed with Cord or Vinyl Tape Insulate this part with the attached insulation.

Insulation Attached to Indoor Unit Field-Supplied Refrigerant Piping

Indoor Unit Field-Supplied Insulation

Connecting Pipe

Brazing

G Utilize clean copper pipes without any moisture or foreign material on the internal surface of pipes. When connecting refrigerant piping, cut copper pipes with a pipe cutter and blow the pipes with nitrogen. Do not utilize a saw and a grindstone or others which cause copper powder.

G When cutting pipes, secure the part for brazing as shown below.

B: Minimum Depth (mm) 6 7 8 10 12 14

B

A

A: Outer Diameter of Pipe (mm) Over 5, Below 8 Over 8, Below 12 Over 12, Below 16 Over 16, Below 25 Over 25, Below 35 Over 35, Below 45

G Cautions for Refrigerant Pipe Ends When installing pipe through the wall, secure a cap at the end of the pipe.

Incorrect

Correct

Hole

Do not place the pipe directly on the ground.

Correct

Correct

Incorrect

Incorrect Rain water can enter.

Hole

Attach a cap or vinyl tape.

Attach a cap or vinyl tape.

Attach a cap or vinyl bag with rubber band.

49

(2) Insulation Attach insulation packed with Multi-Kit to each branch utilizing vinyl tape. Also attach insulation to piping supplied in the field.

NOTE When polyethylene foam is applied, a thickness of 10mm for the liquid piping and 15mm to 20mm for the gas piping is recommended.

Use the insulation with the heat resistance to 100°C, as the temperature of the gas piping is high.

For Line Branch

For Header Branch

Factory-Supplied Insulation

Factory-Supplied Insulation Do not leave a gap between the insulation.

Field-Supplied Insulation

Do not leave a gap.

G Perform insulation work after the surface temperature decreases to the room temperature, If not, insulation material may melt.

G If the ends of the piping system are open after accomplishing piping work, securely attach caps or vinyl bags to the ends of the piping, avoiding the invasion of moisture and dust.

For Line Branch

For Header Branch

Field-Supplied Piping

Gas Piping

Field-Supplied Piping

Cap Cap Cap Cap Field-Supplied Piping

Caps

Field-Supplied Piping

Liquid Piping

Cap Field-Supplied Piping

Caps Field-Supplied Piping

50

9.2.5 Suspension of Refrigerant Piping

Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases are extremely dangerous and can cause an explosion. It is recommended that compressed air, nitrogen or refrigerant be used for these types of tests.

(1) Piping Materials (a) Prepare field-supplied copper pipes. (b) The piping size should be selected using the following figures. (c) Select clean copper pipes. Make sure there is no dust and moisture inside. Before connecting pipes, blow the inside of the pipes with nitrogen or dry air, to remove any dust and foreign materials.

(2) Suspension of Refrigerant Piping Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc.

(If touched, abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length.)

1 to 1.5 m

Nominal Diameter

Below 22.2

above 25.4

Max. Space

1.0 m

1.5m

Outdoor Unit

Fire-Proof Treatment

1m

1m

1m

Indoor Unit

(a) Do not fix the refrigerant piping directly with the metal fittings (The refrigerant piping may expand and contract). Some examples for suspension method are shown below.

For Suspending Heavies

For Piping Along Wall

For Instant Installation Work

There are 2 kinds of surface treatment such as; standard chromating and ceramic coating treatment (*). <Ceramic Coating> Coating Treatment with triple strong coating on the iron material surface, and has the following characters.

• Corrosion Resistance: Superior in adhesion and corrosion resistance due to triple coating • Weather Resistance and Heat Resistance: Strong resistance to ultra-violet rays and solar heat due to ceramic coating • Surface Hardness: Superior in excoriation resistance due to high hardness of the surface 51

9.3

Electrical Wiring

All the field wiring and electrical components must comply with local codes.

9.3.1 Electrical Wiring of Indoor Unit and Outdoor Unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown in Fig. 7.1 and Fig. 7.2 of each indoor unit content.

Check to ensure that the terminal for power source wiring (terminals “L1” to “L1” and “N” to “N” of each terminal board: AC380-415V, terminals “R” to “L1” and “T” to “L2” of each terminal board: AC220V) and intermediate wires (Operating Line: terminals “1” to “1” and “2” to “2” of each terminal board: DC5V) between the indoor unit and the outdoor unit coincide correctly. If not, some component will be damaged.

(1) Follow local codes and regulations when performing electrical wiring.

(2) Connect the power source wiring to each outdoor unit and ELB and knife switch should be used for each outdoor unit.

(3) Connect the power source wiring to each indoor unit and perform an ELB and knife switch per indoor units with the refrigerant piping connected to the same outdoor unit.

(4) Connect the operation wiring to the units in the same refrigerant cycle (The refrigerant piping and the control wiring should be connected to the same indoor units). If the refrigerant piping and the control wiring are connected to the units in the different refrigerant cycle, it may cause a abnormal operation.

(5) Use shielded twist pair wire (more than 0.75mm2) for operation wiring between outdoor unit and indoor unit, and operation wiring between indoor unit and indoor unit. (Total Wiring Length ≤ 1000m) (6) Use 2-core wire for the operating line (Do not use wire with more than 3 cores).

(7) Use shielded wires for intermediate wiring to protect the units from noise obstacle at length of less than 300m and size complied with local code. <In Case of Non-used H-LINK> Connect the operating line for the units in the same refrigerant cycle (The operating line shall be connected to the indoor units with the refrigerant piping connected to the same outdoor unit) In the case that each of the refrigerant piping and the operating line is connected to the units of different refrigerant cycle, it may cause an abnormal operation.

(8) The recommended breaker sizes are shown in Table 6.1.

(9) In the case that a conduit tube for field-wiring is not used, fix rubber bushes with adhesive on the panel.

52

9.3.2 H-LINK System

NOTE The H-LINK system can not be applied to the cycle with the old model unit or the unit with old transmission.

(1) Application The new H-LINK wiring system requires only two (2) transmission wires connecting each indoor unit and outdoor unit for up to 16 refrigerant cycles, and connecting wires for all indoor units and all outdoor units in series.

This H-LINK system can be applied to the following models.

• Indoor Unit • Outdoor Unit RPI-✴✴✴FSN RAS-✴✴✴FSN RCI-✴✴✴FSN RCD-✴✴✴FSN RPK-✴✴✴FSNSM(1) RPF-✴✴✴FSNE RPFI-✴✴✴FSNE RPC-✴✴✴FSN (2) Features The H-LINK has the following features; FEATURES: • The total wiring length is remarkably reduced.

• Only one (1) connection is required for the wiring between the indoor unit and outdoor unit.

• Easy wiring connection to the central controllers Example of H-Link System Outdoor Unit

Transmission Wires

Rerigerant Piping

Indoor Unit

One Refrigerant Cycle

CS - NET

SPECIFICATIONS: • Transmission Wire: 2-Wire • Polarity of Transmission Wire: Non-Polar Wire • Maximum Outdoor Units To Be Connected: 16 Units per system • Maximum Indoor Units To Be Connected: 32 Units per cycle and 128 Units per H-LINK system • Maximum Wiring Length: Total 1000m (including CS-NET) • Recommended Cable: Twist Pair Cable with Shield, over 0.75mm2 (Refer to Item (5)) • Voltage: DC5V

NOTE Other cables except for Twist Pair Cable can not be used for H-LINK system.

53

(3) System Example of H-LINK (a) Using H-LINK System For Only Air Conditioners There are two typical cases of using H-LINK system; (1) Using H-LINK System For Only Air Conditioners, and (2) Using H-LINK System For Air Conditioners with Central Control Device, and the system examples are as shown below.

1

Line Connection with All Units

2

Line Connection for Each Floor

Outdoor Units

Outdoor Units

DO NOT make a wiring loop

Indoor Units

3

Indoor Units

Connection with One Main Line and Branch Lines for Units Outdoor Units

Indoor Units

(b) Using H-LINK System For Air Conditioners with Central Control Device 1

In case that H-LINK is applied when electrical wiring is performed.

2

In case that H-LINK is not applied when electrical wiring is performed.

Outdoor Units Outdoor Units

Indoor Units

Indoor Units CS - NET

Connect CS-NET wiring to instrument wiring.

CS-NET

Connect CS-NET wiring to instrument wiring.

NOTE 1. The maximum quantity of units to be connected is 16 outdoor units and 128 indoor units.

2. Do not make a wiring in a loop.

3. In the case of (b)- 2 as shown above, H-LINK is applied after the instrument wiring is completed.

Therefore, the dip switches are required to be set according to â&#x20AC;&#x153;Setting of Dip Switches on PCBâ&#x20AC;?.

54

(4) Dip Switch Setting of Indoor PCB and Outdoor PCB It is required to set dip switches of every indoor unit and outdoor unit and match of the transmission circuit impedance. (a) Dip Switch Setting <Dip Switch Setting Example> Cycle No. 0

Cycle No. 1

Cycle No. 2

ON

ON

DSW10 End Terminal Resistance

ON

DSW1 Refrigerant Cycle

ON

ON

ON

1 2 3 4

1 2 3 4

1 2 3 4

1

1

2

2

1

2

Outdoor Units

Indoor Units

DSW5 Refrigerant Cycle

ON

ON

ON

ON

ON

ON

ON

1 2 3 4

1 2 3 4

1 2 3 4

1 2 3 4

1 2 3 4

1 2 3 4

1 2 3 4

(1)

(1)

(2)

(2)

(3)

(3)

(3)

Ref. Cycle No. RSW Indoor Unit Address

Name of Dip Switch

Mark

Refrigerant Cycle

DSW1

1

0

0

Setting Before Shipment ON

Outdoor Unit

1 2 3 4

ON

End Terminal Resistance

DSW10-1P 1

Refrigerant Cycle

DSW5

2

ON 1 2 3 4

Indoor Unit Indoor Unit Address

0

RSW

1

0

1

2

Function For setting refrigerant cycle address of outdoor unit.

Set the DSW1 not to overlap the setting of other outdoor units in the same H-LINK system.

For matching impedance of transmission circuit.

Set the DSW10 according to the quantity of outdoor units in the H-LINK system.

For setting refrigerant cycle address of indoor units.

Set the DSW5 corresponding to the address of outdoor unit in the same refrigerant cycle.

For setting indoor unit address. Set the RSW not to overlap the setting of other indoor units in the same refrigerant cycle. (If not set, the automatic address function is performed.)

55

(b) Setting of End Terminal Resistance Before shipment, No.1 pin of DSW10 is set at the “ON” side.

In the case that the outdoor units quantity in the same H-LINK is 2 or more, set No.1 pin of DSW10 to the “OFF” side at the 2nd unit. If only one outdoor unit is used, no setting is required.

Setting of End Terminal Resistance DSW10 Before Shipment ON

1

OFF

ON

2

1

2

OFF

ON

ON

Cancellation

ON

DSW10 1

1

2

1st Unit

2

1

2

2nd Unit

3rd Unit

Outdoor Units (3 Units)

Indoor Units

(5) Electrical Cable Model Maker Without Shield With Shield (Copper Foil) With Shield (Braiding)

NIHON DENSEN KOGYOKAI JKEV JKEV-S JKEV-SB

HITACHI DENSEN

NIHON DENSEN INDUSTRIES

KPEV

KNPEV

KPEV-S

KNPEV-S

KPEV-SB

KNPEV-SB

NOTE: Both the cable with shield and the cable without shield are available.

56

9.4

Test Run Procedure by Wireless Remote Control Switch (PC-LH3A)

AUTO H E AT DRY COOL FA N

MODE

RESET

°C

Hi Me Lo

TIMER ON OFF RUN/STOP

TEMP.

FAN

LOUVER

CANCEL

SET

OFF TIME

ON TIME TIMER

Slide toward the arrow direction by pushing.

(1) Perform the test run after the installation work is completed. (a) Set the batteries for the controller. (b) Turn ON the power supply for the indoor and outdoor units. (c) “ ” lamp (yellow) on the receiver of the indoor unit flashes 0.25 seconds OFF), and then turns (0.25 seconds ON OFF. While the lamp is flashing, the unit will not operate because it is initializing.

t

(2) Set the test run mode by pressing “SET” and “OFF TIME” switch simultaneously for more than 3 seconds. The LCD should be as shown in the figure on the right.

COOL

(3) Set the operation mode by pressing the “MODE” switch.

COOL

Test Run Mode is under suspension.

TIMER OFF

°C

TIMER OFF

Me

Test Run Mode is under operating.

(4) Operate the Test Run by pointing the transmitter towards the receiver of the indoor unit and press the “ RUN/STOP” switch. When the commands are received by the indoor unit, the “ ” lamp (yellow) of the receiver will come on briefly.

Check the commands are received well and the mode selected 3) is set correctly.

In the test run mode, the red lamp (RUN) of the receiver is turned ON and the green lamp (TIMER) flashes (0.5 seconds ON 0.5 seconds OFF).

And then set off timer for 2 hours.

NOTE: In the case that the “ ” lamp (yellow) does not turn ON, the controls may not have reached the receiver. Send the commands again.

(5) Adjust the angle of the air louver as follows.

The air louver has a mechanism for the auto-swing function.

Do not move the louver by hand forcefully. (a) Select the FAN mode by pressing the “MODE” switch. (b) Set the louver angle by pressing the “LOUVER” switch.

(6) Stop the Test Run (a) Test Run is stopped after 2 hours automatically. (b) Test Run is stopped by pressing “ RUN/STOP” switch again.

After Test Run is finished, check that the red lamp (RUN) and the green lamp (TIMER) turn OFF.

t

57

★ In Case of Using Receiver Kit (PC-RLH9, PC-RLH10 or PC-RLH11) The unit No. with alarm occurrence, the alarm code and the unit code are indicated at the 7-segment indicator of the receiver part as follows.

Check the unit according to the Service Manual.

1

2

3

4

5

6

Malfunctioning unit number is displayed (approx. 1 sec.).

Turns OFF (approx. 1 sec.)

The alarm code is displayed (approx. 1 sec.).

Turns OFF (approx. 1 sec.)

The unit code is displayed (approx. 1 sec.).

Turns OFF (approx. 1 sec.)

The above sequence is indicated for each malfunctioning unit and displayed in order of the unit number.

ATTENTION 1. The setting of the indoor unit No. and the unit No. set by the auto-address can not be checked by the remote control switch.

In case of setting the unit No., perform the setting according to the “Dip Switch Setting” of the indoor unit.

2. Install the cable for the remote control switch and cable between units with a distance more than 30cm away from the power line.

In case of installing the cables within 30cm from the power line, insert the cables into the metal conduit tube and ground the one end of the tube.

If the above treatment is not performed, the control failure may occur due to the noise.

3. Check the hole for leading cables of the remote control switch case mainly, close the clearance of the hole and the cables for prevention from entering of the insects and water.

58

Table 9.1 Test Run and Maintenance Record

MODEL:

SERIAL. No.

COMPRESSOR MFG. No.

CUSTOMER'S NAME AND ADDRESS:

DATE:

1. Is the rotation direction of the indoor fan correct?

2. Is the rotation direction of the outdoor fan correct?

3. Are there any abnormal compressor sounds?

4. Has the unit been operated at least twenty (20) minutes?

5. Check Room Temperature Inlet: No. 1 DB /WB Outlet: DB /WB Inlet: No. 5 DB /WB Outlet: DB /WB

o

C, C, o C, o C, o

6. Check Outdoor Ambient Temperature o Inlet: DB C, o Outlet: DB C,

No. 2 DB DB No. 6 DB DB

/WB /WB /WB /WB

WB WB

7. Check Refrigerant Temperature Liquid Temperature: Discharge Gas Temperature:

C, C, o C, o C, o

No. 3 DB DB No. 7 DB DB

/WB /WB /WB /WB

o

C, C, o C, o C,

No. 4 DB DB No. 8 DB DB

V,

L2-L3

o

/WB /WB /WB /WB

o

C C o C o C o

o

C C

o

o

C C

o

8. Check Pressure Discharge Pressure: Suction Pressure:

MPaG MPaG

9. Check Voltage Rated Voltage: Operating Voltage: Starting Voltage: Phase Imbalance:

o

L1-L2 1-

V V, V

L1-L3

V

V = Vm

10. Check Compressor Input Running Current Input: Running Current:

kW A

11. Is the refrigerant charge adequate?

12. Do the operation control devices operate correctly?

13. Do the safety devices operate correctly?

14. Has the unit been checked for refrigerant leakage?

15. Is the unit clean inside and outside?

16. Are all cabinet panels fixed?

17. Are all cabinet panels free from rattles?

18. Is the filter clean?

19. Is the heat exchanger clean?

20. Are the stop valves open?

21. Does the drain water flow smoothly from the drain pipe?

59

9.5

Test Run from Outdoor Unit Side

The procedure of test run from the outdoor unit side is indicated below. Setting of this dip switch is available with the power source ON. Setting of Dip Switch (Before Shipment)

Outdoor Unit Printed Circuit Board (PCB1)

DSW4 Switch for Setting of Service Operation and Function 1. Test Run ON 2. COOL/HEAT Setting (ON: Heating Operation) 1 2 3 4 5 6 3. OFF (Fixed) 4. Manual Compressor OFF OFF 5. Numbers of Indoor Unit >17 6. Compressor Exchange

For Service DSW4

G Do not touch any other electrical parts when operating switches on the PCB. G Do not attach or detach service cover when the power source for the outdoor unit is ON and the outdoor unit is operated.

G Turn all the dip switches of DSW4 OFF when the test run operation is completed.

Dip Switch Setting 1. Setting of Operation Mode Cooling: Set DSW4-2 OFF. 1 2 3 4 5 6

ON OFF

Heating: Set DSW4-2 ON. 1 2 3 4 5 6

ON OFF

Operation 1. The indoor unit automatically start to operate when the test run of the outdoor unit is set.

2. The ON/OFF operation can be performed from the remote control switch or DSW4-1 of the outdoor unit.

3. Continuous operation during 2 hours is performed without Thermo-OFF.

# Take care that the indoor units operate in accordance with the test run operation of the outdoor unit. # The test run is started from the outdoor unit and stopped from the remote control switch, the test run function of the remote control switch is cancelled.

However, the test run function of the outdoor unit is not cancelled. # In case that the plural indoor units are connected with one remote control switch, all the units start test run operation at the same time, therefore, turn the power source OFF for the indoor units not to operate test run.

In this case, the "TEST RUN" indication of the remote control switch may flicker, and this is not abnormal. # The setting of DSW4 is not required for the test run from the remote control switch.

1. When DSW4-4 is ON during compressor operation, the compressor stops to operate immediately and the indoor unit is under the condition of Thermo-OFF. 2. When DSW4-4 is OFF, the compressor starts to operate after the cancellation of 3-minutes guard.

# Do not repeat compressor ON/OFF frequently.

Test Run 2. Starting Test Run Set DSW4-1 ON and the operation is started after a few~20 seconds.

When heating operation, leave DSW4-2 at ON. ON

1 2 3 4 5 6

OFF

1. Setting * Compressor Manual OFF: Set DSW4-4 ON. ON

Manual OFF of Compressor

1 2 3 4 5 6

OFF

* Compressor ON: Set DSW4-4 OFF. ON

1 2 3 4 5 6

Remarks

OFF

Manual Defrost

60

1. Manual Defrost Operation Starts Press PSW1 for more than 3 seconds during heating operation, the defrost operation is started after 2 minutes.

This function is not available within 5 minutes after starting heating operation.

2. Manual Defrost Operation Finishes Defrost operation is automatically ended and the heating operation is started.

# Do not repeat defrost operation 1. Defrost operation is available frequently. regardless of frosting condition and total time of heating operation. # When manual defrost operation is accepted by PSW1, the time left before 2. Defrost operation in not performed starting defrost operation is indicated when the temperature of outdoor at the 7-segment indicator on the PCB. heat exchanger is higher than o 10 C, high pressure is higher than 2.0MPa (20 kgf/cm2G) or Thermo-OFF. Time left (every 4 seconds)

(1) During the test run mode, the following default indication will appear. (a) Cooling

(b) Heating

HIGH COOL

SET TEMP

HIGH

°C

SET TEMP

HEAT

A/C

°C

A/C

(2) If the remote control switch is set to a different mode, the test run function will not start. In this case perform the following actions before the test run.

• Remote Control Switch: STOP • Central Station: STOP and Remote Control Switch is available mode.

During the test run mode do not change the remote control switch setting or the central station setting.

(3) If an alarm code is indicated during the test run, reset the system by turning the main power supply off then back on. The system should then operate.

(4) Check to ensure that the indoor fan and the outdoor fan rotate correctly and that the air flow is smooth.

(5) Check the power supply, if the power supply is abnormal, contact with electric power company.

In general, voltage drop will occur when starting as shown in the figure.

Initial Voltage (V1) Operating Voltage (V3)

Starting Voltage (V2)

(6) Check to ensure that the refrigerant charge is correct by referring to Fig 9.1.

(7) Check the safety device (high pressure switch).

When the following procedure is performed, the high pressure will be increased.

In case of cooling, cover the outdoor unit heat exchanger.

In case of heating, over the air inlet of the indoor unit.

61

When the high pressure retry control is activated, the outdoor unit PCB shows “P13”.

Alarm code “45” will be indicated when the code “P13” has indicated more than 3 times in one hour.

In case of performed from PC-P1H. (a) Alarm code “45” will be indicated. (b) The operation lamp is flickered.

ABNML

(b)

(a)

NOTE Depends on a temperature condition, the high pressure could not be increased before the activation of the high pressure switch.

62

Piping Length: 7.5m

Piping Length:50m

Cooling Operation

Cooling Operation 3.5

3.5

35 Outdoor Unit Temp. (DB oC)

35 Outdoor Unit Temp. (DB oC)

30

3.0 Discharge Pressure (MPa)

Discharge Pressure (MPa)

3.0

25 2.5 35

1.0

30

25 2.5 1.0

Outdoor Unit Temp. (DB oC)

2.0

0.8 25 0.7

30 2.0

0.8 25 0.7

0.6

0.6

0.5

0.5 15

20

0.9 Suction Pressure (MPa)

30

35 Outdoor Unit Temp. (DB oC)

Suction Pressure (MPa)

0.9

25 20 Indoor Unit Inlet Temp. (WB oC)

15

25

Indoor Unit Inlet Temp. (WB oC)

Heating Opration

Heating Operation

3.3

3.3

3.0

3.0

Indoor Unit Temp. (DB oC) Indoor Unit Temp. (DB oC)

27

27 24

0.9

2.0 27 24 20

Indoor Unit Temp. (DB oC)

1.8

0.8 0.7 0.6 0.5 0.4 0.3

20

0.9

2.0

Indoor Unit Temp. (DB oC)

1.8

27 24 20

0.5 0.4 0.3 0.2

0.1 0

5

10

0.7 0.6

0.2 -5

0.8 Suction Pressure (MPa)

20

Discharge Pressure (MPa)

2.5 24

Suction Pressure (MPa)

Discharge Pressure (MPa)

2.5

0.1

15

-5

Outdoor Unit Inlet Temp. (WB C) o

0

5

10

15

Outdoor Unit Inlet Temp. (WB oC)

Fig. 9.1 Normal Operating Pressure

NOTE 1. The above curves indicate pressures under the following conditions.

Indoor Fan Tap: HIGH Indoor Total Capacity: 100% compared with the capacity of the outdoor unit.

2. Do not use the above data for the refrigerant charge procedure.

These data should be used as a reference for the checking of operating conditions.

63

Table 9.2 HITACHI Air Conditioner SET-FREE Maintenance Record Customer's Name

DATE: ) RAS-

Outdoor Unit Model (Serial No. (1) Operation Mode (2) Test Run Start Time

(Serial No.

)

RAS-

-

-

(Serial No.

)

(3) Data Collect Start Time (4) Read Out Data from 7-Segment in Outdoor Unit Protection Control Code Outdoor Microcomputer Output

SC

Indoor Total Operating Capacity

oP

Inverter Frequency

H1

Compressor Running Quantity

CC

Outdoor Fan Step Outdoor Unit Expansion Valve Opening

Fo oE1 oE2 oE3 oE4 oEb

Discharge Pressure

Pd

Suction Pressure Discharge Gas Temperature

Ps Td1 Td2 Td3 Td4 Td5 Td6

Heat Exchanger Liquid Pipe

TE1

Temperature

TE2 TE3 To

Outdoor Temperature Compressor Running Current

A1 A2 A3 A4 A5 A6

Indoor Unit (Unit No. Expansion Valve Opening

64

) iE

Heat Exchanger Liquid Temp.

Heat Exchanger Gas Temp.

Intake Air Temp.

Outlet Air Temp.

Capacity (x 1/8HP) Indoor Unit Stoppage Cause Code Restricted Control for Prevention of Compression Ratio Decrease Restricted Control for Prevention of High Pressure Increase Restricted Control for Prevention of Inverter Fin Temp. Increase Restricted Control for Prevention of Discharge Gas Temp. Increase Restricted Control for Prevention of TdSH Decrease Restricted Control for Prevention of Overcurrent Accumulated Operation Time of Comp.1 Accumulated Operation Time of Comp.2 Accumulated Operation Time of Comp.3 Accumulated Operation Time of Comp.4

TL TG Ti To CA d1

UJ1 UJ2 UJ3 UJ4

Accumulated Operation Time of Comp.5 Accumulated Operation Time of Comp.6 Outdoor Alarm Code Inverter Stoppage Cause Code Fan Motor Controller Stoppage Cause Code Total Indoor Unit Capacity (x 1/8HP) Total Indoor Unit Quantity Refrigerant System Address

UJ5 UJ6 AC iTC FTC CP AA GA

c11 c13 c14 c15 c16 c17

52C1 52C2 52C3 52C4 52C5 52C6 DC Fan FAN1 52C1 52C2 52C3 52C4 52C5 52C6 DC Fan FAN1 20A1 20F1

20G

20A2

20C

20B

211

212

CH 1

FAN3

20A1 20F1

20G

20A2

20C

20B

211

212

CH 1

FAN3

65

- CONTENTS <Common> Items 1. Maintenance 1.1 Regular Inspection 1.2 Filter Cleaning 1.3 Filter and Element Cleaning for Total Heat Exchanger 2. Troubleshooting 2.1 Initial Troubleshooting 2.2 Troubleshooting by Alarm Code 2.3 Troubleshooting in Check Mode 2.4 Troubleshooting by 7-segment Display 2.5 Protection Control Code on 7-segment Display 2.6 Self-Checking of PCB using Remote Control Switch 2.7 Self-Checking of Remote Control Switch 3. Caution on Refrigerant Leakage

66

Page 67 (Please refer to Technical Catalog II, SP2-S02 or SP2-S03, 2006.)

67 67 67 69 75 82 85 87 89

1.

Maintenance

Please refer to Technical Catalog II, SP2-S02 or SP2-S03, 2006.

2.

Troubleshooting

2.1

Initial Troubleshooting

2.1.1 This Is Not Abnormal (1) Smells from Indoor Unit Smell adheres on indoor unit after a long period of time. Clean the air filter and panels or allow a good ventilation.

(2) Sound from Deforming Parts During system starting or stopping, an abrading sound might be heard. However, this is due to thermal deformation of plastic parts. It is not abnormal.

(3) Steam from Outdoor Heat Exchanger During defrosting operation, ice on the outdoor heat exchanger is melted, resulting in making steam.

(4) Dew on Air Panel When the cooling operation continues for a long period of time under high humidity conditions (higher than 27oC DB/80% R.H), dew can form on the air panel.

(5) Refrigerant Flow Sound While the system is being started or stopped, sound from the refrigerant flow may be heard.

2.1.2 Not Cooling or Heating Well • Check for obstruction of air flow of the outside or inside units.

• Check if too much heat source exists in the room.

• Check if the air filter is clogged with dust.

• Check to see if the doors or windows are opened or not.

• Check if the temperature condition is not within the operation range.

2.1.3 Not Operated • Check for electrical wiring.

• Check for dip switch setting.

• Check whether the “SET TEMP” is set at the correct temperature.

• In case that “RUN” lamp on remote control switch is flashing every 2 seconds, check for connection of remote control line.

• n the case that “RUN” lamp flashes 5 times (5 seconds) with unit number and alarm code displayed, refer to the next item “2.2 Troubleshooting by Alarm Code” and the “Service Manual”.

• In case that no alarm code is indicated and normal operation is not available, refer to the “Service Manual” because abnormality of some device is suspected.

2.2

Troubleshooting by Alarm Code

The Alarm Codes shown below are indicated when a fault occurs during operation.

CAUTION Before servicing electric parts, cut off power supply completely.

Indication

Trouble

RUN lamp flashes for 2 seconds.

Possible Causes

Failure in Transmission between Indoor Unit and Remote Control Switch

Remote Control Cable Broken Contact Failure in Remote Control Cable IC or Microcomputer Defective

RUN lamp flashes Failure 5 times (5 seconds) with unit number and alarm code displayed.

FAN HIGH

SWING LOUVER

ON/OFF TIMER

Action Locate the cause and repair.

Check by remote control self-checking function.

(See Service Manual.)

Indication of Unit Number in Remote Control Switch Unit No.0

Unit No.1

Unit No.2

Unit No.3

Unit No.4

Unit No.5

Unit No.6

Unit No.7

Unit No.3

Unit No.8

Unit Unit Unit Unit Unit Unit Unit No.9 No.10 No.11 No.12 No.13 No.14 No.15

Alarm Code of "Outdoor Unit Protection Activated"

NOTE: Alarm code is also indicated on 7-segment display on outdoor unit PCB1, if a trouble occurs.

SET TEMP.

COOL MED HEAT

LOW DEFROST DRY A/C + CENTRAL AUTO VENT H.STRG

ADDS

RN HR

ABNML

FILTER

T. RUN CHECK

RUN / STOP

MODE FAN SPEED

UNIT

NO FUNCTION SERVICE

TEMP.

ON/OFF TIMER

VENTI LOUVER

RESET

CHECK TIME

67

â&#x20AC;˘ Alarm Codes Code No.

Category

01

Indoor Unit

Tripping of Protection Device

02

Outdoor Unit

Tripping of Protection Device

03

Transmission

Abnormality between Indoor and Outdoor (or Indoor)

04

Inverter

04 *

Transmission

05 06

Voltage Drop

Content of Abnormality

Inverter Trip of Outdoor Unit Abnormality of Fan Controller Abnormality of Power Source Wiring Voltage Drop in Outdoor Unit Excessively Low or High Voltage to Outdoor Unit Decrease in Discharge Gas Superheat

07 Cycle

Increase in Discharge Gas Temperature

08 09 11 12 13 14 19 21 22 23 24 29 31

Outdoor Unit

Sensor on Indoor Unit

Sensor on Outdoor Unit

Abnormal Transmission of Other Indoor Unit

32 35

Tripping of Protection Device Inlet Air Thermistor Outlet Air Thermistor Freeze Protection Thermistor Gas Piping Thermistor Tripping of Protection Device High Pressure Sensor Outdoor Air Thermistor Discharge Gas Thermistor Evaporating Thermistor Low Pressure Sensor Incorrect Setting of Outdoor and Indoor Unit

System

38 39 43 44 Pressure 45 47 51

Incorrect Setting in Indoor Unit No. Abnormality of Protective Circuit in Outdoor Unit Abnormality of Running Current at Constant Compressor Pressure Ratio Decrease Protection Activating Low Pressure Increase Protection Activating High Pressure Increase Protection Activating Low Pressure Decrease Protection Activating Abnormality of Current Sensor for Inverter Thermal Protection Activating Overcurrent Protection Activating

52 Inverter 53

IPM Protection Activating

54

Increase in Inverter Fin Temperature

56

Abnormality of Detection for Fan Motor Position

57

Outdoor Fan

58 dd**

Fan Controller Protection Activating Abnormality of Fan Controller

Transmission

Incorrect Wiring between Indoor Units

EE Compressor Compressor Protection * The indication flashes. ** In case of PC-P1H.

68

Leading Cause Failure of Fan Motor, Drain Discharge, PCB, Relay.

Failure of Compressor, Refrigerant Quantity, Inverse Phase.

Incorrect Wiring. Failure of PCB. Tripping of Fuse.

Failure in Transmission of PCB for Inverter.

Failure in Transmission between Fan Controller and Inverter.

Reverse Phase Incorrect Wiring.

Voltage Drop. Incorrect Wiring.

Tripping of Fuse.

Excessive Refrigerant Charge.

Failure of Thermistor, Wiring.

Insufficient Refrigerant.

Failure of Thermistor, Wiring.

Failure of Fan Motor, Incorrect Wiring.

Failure of Thermistor, Sensor, Connection.

Failure of Fan Motor, Incorrect Wiring.

Failure of Thermistor, Sensor, Connection.

Incorrect Setting of Capacity Code.

Failure of Power Supply, PCB in Other Indoor Unit.

Existence of the same Indoor Unit No. Incorrect Connection to PCB in Outdoor Unit.

Incorrect Wiring.

Failure of Compressor, Inverter, Power Supply.

Overload to Indoor in Cooling.

High Temperature or Outdoor Air. Overload Operation.

Excessive Refrigerant.

Vacuum Condition in Cycle Failure of Expansion Valve. Insufficient Refrigerant.

Failure of Current Sensor.

Overload, Overcurrent, Locking to Compressor.

Overcurrent, Low Voltage, Overheating of Inverter Parts.

Abnormal Inverter Fin Thermistor, Abnormal Outdoor Fan. Abnormal Detection Circuit of Transmission.

Overcurrent, Abnormal Fan Controller Fin. Abnormal Fan Speed.

Incorrect Wiring between Indoor Units and Remote Control Switch.

Failure of Compressor.

2.3

Troubleshooting in Check Mode

Use the remote control CHECK switch in the following cases.

(1) When the RUN lamp is flashing.

(2) To trace back the cause of trouble after restarting from stoppage with the RUN lamp flashing.

(3) To check during normal operation or stoppage.

(4) To monitor the temperatures of intake and discharge air.

FAN HIGH

SWING LOUVER

HEAT

LOW

DEFROST DRY A/C + CENTRAL AUTO VENT H.STRG

ADDS

SET TEMP.

RN HR

Check Mode 1: Current data will be displayed.

UNIT

NO FUNCTION SERVICE

ABNML

FILTER

T. RUN CHECK

RUN / STOP

MODE FAN SPEED

Check Mode

ON/OFF TIMER

COOL MED

TEMP.

ON/OFF TIMER

VENTI LOUVER

RESET

CHECK TIME

Check Mode 2: Data held immediately before failure, will be displayed.

Normal Mode

CHECK

Press for more than 3 seconds.

HIGH COOL

Unit Number and Alarm Code Displayed

ADDS. RN A/C CHECK

Indication will delay as transmission between the remote control switch and indoor unit takes about 10 seconds.

All data may be displayed as "FF" or "-1" or "255".

These transient data produced temporarily by software do not affect device functions at all. (The alarm code may also be indicated as "FF".)

If it is not indicated check mode 1, it has possibilities that the transmission between remote control switch and indoor unit is not collect.

Alarm code identifying the last fault that has occurred in the indicated unit.

Unit number of connected unit or unit number for which checking mode was selected previously.

Forward:

Press the switch to rise from 00 to 01 to 02 …

Backward: Press the switch to descend from 15 to 14 to 13 …

Perform within 7 seconds to check another unit.

(A) After 7 seconds

HIGH

Check Mode 1 (See 2.3.1 for details.)

COOL

To View the Previous Indication TEMP Press

A/C CHECK

HIGH COOL A/C CHECK

To View the Next Indication TEMP Press

CHECK

Press for more than 3 seconds.

HIGH

Unit Number and Alarm Code Displayed

COOL ADDS. RN A/C

Press Press

CHECK

to view the next data. to view the previous data.

See (A) After 7 seconds

ADDS: Number of Indoor Unit in No. ** Cycle

HIGH

Check Mode 2 (See 2.3.2 for details.)

RN: No. ** Refrigerant Cycle

COOL A/C CHECK

TEMP HIGH COOL

Press A/C +

CHECK

VENTI

CHECK

Check Mode Released

Press

In Check Mode 2, Data of the first three units connected serially to a remote control switch are available.

You can press the CHECK switch to release Check Mode 2.

Check Mode 1 cannot be released even if you press the CHECK switch.

69

Although the wireless remote controller is used for wall type indoor unit with built-in receiver part, the alarm code can be checked by connecting PC-2H2 to the connector (Blue) of the unit as shown below and pressing the operation switch.

NOTES: Suction Grille 1. The unit is not operated by pressing operation switch.

2. The above function is available only when alarm occurs.

3. The PCB check by remote controller is not available.

4. The indication is the data when connecting PC-2H2, not the data before the alarm occurs.

Connector for Check (Blue)

2.3.1 Contents of Check Mode 1 Temperature Indication

1

2

Indoor Unit Temp.

Setting (oC)

Indoor Unit Intake Air Temp. at Thermistor (oC)

3

Indoor Unit Discharge Air Temp. at Thermistor (oC)

4

Indoor Unit Heat Exchanger Liquid Pipe Temp. (oC)

5

Temperature at Remote Sensor (oC)

6

Outdoor Unit Ambient Air Temp. (oC)

7

Indoor Unit Heat Exchanger Gas Pipe Temp. (oC)

8

Outdoor Unit Evaporating Temp. during Heating (oC)

9

Control Information

Discharge Gas 10 Temp. at the Top of Comp. Chamber (oC)

to next page

70

Indication of Category Code Indication of Temperature, etc.

Normal

Abnormal

â&#x20AC;Śâ&#x20AC;ŚTemperature Displayed - - (Thermistor Open-circuited or PCB Defected) or 129 (Temp. for Top of Comp.)

F F (Thermistor Short-circuited or PCB Defected) or 255 or 127 (Temp. for Top of Comp.)

See "2.6 Self-Checking of PCB using Remote Control Switch"

(NOTE 1) During transient period such as starting time, etc., "- -" may be indicated for a limited time.

This is indicated only when a remote sensor is connected.

The indication of "- -" is normally indicated.

RPK series can not connect a remote sensor.

Therefore indication is "- -".

This indicates the internal information for the remote control switch. In case of SET-FREE, this indication shows the operating compressor quantity.

In case that temperature is higher than 100oC, two digits flicker. (ex.) During two compressors operation, average temperature of two compressors is indicated.

In case that temperature is higher than 126oC, " ".

Thermo Temp. of 11 Remote Control Switch

Heating Thermo-ON Cooling Thermo-ON

Alarm Operation

Dark

FAN HIGH

H2

Indication on Micro-Computer Input/Output

52H

SWING LOUVER

ON/OFF TIMER

SET TEMP.

COOL MED HEAT

LOW

DEFROST DRY A/C + CENTRAL AUTO VENT H.STRG

ADDS

RN HR

ABNML

Y52C2 Y212

FILTER

T. RUN CHECK

RUN / STOP

Micro-Computer 12 Input/Output in Indoor Unit

UNIT

NO FUNCTION SERVICE

TEMP.

Y211 Y52C1 MODE FAN SPEED

Dark

ON/OFF TIMER

RESET

Y20B VENTI LOUVER

Micro-Computer 13 Input/Output in Outdoor Unit

Indication of Unit Stoppage Cause 14 Cause of Stoppage

Abnormality Occurrence Counter 15

Abnormality Occurrence Times

Instantaneous Power 16 Failure Occurrence Times in Indoor Unit

Transmission Error Occurrence Times 17 between Remote Control Switch and Indoor Unit

Abnormality 18 Occurrence Times on Inverter

Y20A

CHECK TIME

Outdoor Fan

Symbols with a letter Y are relays on PCB 00 Operation OFF, Power OFF 01 Thermo-OFF (NOTE 1), Activating Float Switch 02 Alarm (NOTE 2) 03 Freeze Protection, Overheating Protection 05 Instantaneous Power Failure at Outdoor Unit, Reset (NOTE 3) 06 Instantaneous Power Failure at Indoor Unit, Reset (NOTE 4) 07 Stoppage of Cooling Operation due to Low Outdoor Air Temperature, Stoppage of Heating Operation due to High Outdoor Air Temperature 08 Compressor Quantity Changeover, Stoppage (HP > 8) 10 Demand, Enforced Stoppage 11 Retry due to Pressure Ratio Decrease 12 Retry due to Low Pressure Increase 13 Retry due to High Pressure Increase 14 Retry due to Abnormal Current of Constant Compressor (HP > 8) 15 Retry due to Abnormal High Temperature of Discharge Gas, Excessively Low Suction Pressure 16 Retry due to Decrease of Discharge Gas Superheat 17 Retry due to Inverter Tripping 18 Retry due to Voltage Decrease, Other Retry due to Inverter 19 Expansion Valve Opening Change Protection 20 Operation Mode Changeover of Indoor Unit (NOTE 5) (NOTE 1)

(NOTE 2) (NOTE 3)

(NOTE 4)

(NOTE 5)

Explanation of Term, Thermo-ON: A condition that an indoor unit is requesting compressor to operate.

Thermo-OFF: A condition that an indoor unit is not requesting compressor to operate.

Even if stoppage is caused by "Alarm", "02" is not always indicated.

If transmission between the inverter printed circuit board and the control printed circuit board is not performed during 30 seconds, the outdoor unit is stopped.

In this case, stoppage is d1-05 cause and the alarm code "04" may be indicated.

If transmission between the indoor unit and the outdoor unit is not performed during 3 minutes, indoor units are stopped.

In this case, stoppage is d1-06 cause and the alarm code "03" may be indicated.

In the system "20" will be indicated at the difference mode between indoor units.

Indication of Automatic Louver Condition 19 Louver Sensor

to next page

Countable up to 99.

Over 99 times, "99" is always indicated.

(NOTE 1) If a transmitting error continues for 3 minutes, one is added to the occurrence times.

(NOTE 2) The memorized data can be canceled by the method indicated in "2.6 Self-Checking of PCB using Remote Control Switch"

71

Compressor Pressure/Frequency Indication 20

Discharge Pressure (High) (x 0.1 MPa)

21

Suction Pressure (Low) (x 0.01 MPa)

22 Control Information

23

This is an indication for internal information for the remote control switch. This does not have any specific meaning.

Operation Frequency (Hz)

This is an indication for frequency of Inverter.

Indoor Unit Capacity Indication The capacity of the indoor unit is indicated as shown in the table below.

24 Indoor Unit Capacity

25 Outdoor Unit Code

26

Refrigerant Cycle Number

27

Refrigerant Cycle Number

Expansion Opening Indication

Capacity Code of Indoor Unit

n

Indication Code 06 08 10 13 14 16 18 20 22 26 26 32 40 64 80

"n" indicates total number of indoor units; n=

Indoor Unit 28 Expansion Valve Opening (%) Outdoor Unit 29 Expansion Valve MV1 Opening (%) Outdoor Unit 30 Expansion Valve MV2 Opening (%)

Equivalent Capacity (HP) 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 2.8 3.0 3.5 4.0 5.0 8.0 10.0

~

,

,

,

,

,

,

,

(10) (11) (12) (13) (14) (15) (16)

J3: 01 to 16 (01: when shipment (DSW5), Decimal Indication) J4: 00 to 0F (00: when shipment (DSW5), Indication with 16 numbers)

In case of models without Expansion Valve (MV2), the same figure is indicated.

Outdoor Unit 31 Expansion Valve MVB Opening (%) Estimated Electric Current Indication 32

Compressor Running Current (A)

The total current is indicated when several compressors are running.

In case of inverter compressor, the running current Returns to Temperature Indication of primary side of inverter is indicated.

Temperature Indication

72

>

2.3.2 Contents of Check Mode 2 The latest data of the first three indoor units only connected serially are indicated when more than three indoor units are connected to one remote control switch.

By pressing the part of “TEMP” switch, the next display is indicated, If the V part of “TEMP” switch is pressed, the previous display is indicated.

Temperature Indication

1

2

3

Indoor Unit Intake Air Temp. at Thermistor (oC)

Indoor Unit Discharge Air Temp. at Thermistor (oC)

Indoor Unit Heat Exchanger Liquid Pipe Temp. (Freeze Protection) (oC)

Indication of Category Code Indication of Temperature, etc.

Normal

Abnormal

……Temperature Displayed - - (Thermistor Open-circuited or PCB Defected) or (Temp. for Top of Comp.)

129 F F (Thermistor Short-circuited or PCB Defected) or 255 or 127 (Temp. for Top of Comp.)

See "2.6 Self-Checking of PCB using Remote Control Switch"

4

Outdoor Air Temp. (oC)

5

Indoor Heat Exchanger Gas Pipe Temp. (oC)

6

Evaporating Temp. at Heating (oC)

7

Control Information

This is an indication for internal information for the remote control switch.

This does not have any specific meaning.

8

Discharge Gas Temp. at the Top of Comp. Chamber (oC)

The average temperature of running compressors is indicated.

(NOTE 1) During transient period such as starting time, etc., "- -" may be indicated for a limited time.

(NOTE 2) All the data during the check mode 2 will be changed to "00" if a power failure occurs during alarm indication.

to next page

73

Compressor Pressure/Frequency Indication 9

Discharge Pressure (High) (x 0.1 MPa)

10

Suction Pressure (Low) (x 0.01 MPa)

11 Control Information

12

Operating Frequency (Hz)

This is an indication for internal information for the remote control switch. This does not have any specific meaning.

This is an indication for frequency of inverter.

Expansion Opening Indication Indoor Unit 13 Expansion Valve Opening (%)

Outdoor Unit 14 Expansion Valve MV1 Opening (%)

Estimated Electric Current Indication 15

Compressor Running Current (A) Returns to Temperature Indication

Temperature Indication

74

The total value is indicated when two compressors are running.

2.4

Troubleshooting by 7-Segment Display

2.4.1 Simple Checking by 7-Segment Display 1

* Turn on All Indoor Units

2

Turn on the Outdoor Unit

3

Auto-addressing Starts Outdoor Unit Circuit Board PCB1

* All the Indoor Units Connected to the Outdoor Unit

During auto-addressing, the following items can be checked using the outdoor unitâ&#x20AC;&#x2122;s on-board 7-segment LED display.

(1) Disconnection of power supply to the indoor unit.

(2) Reverse connection of the operating line between the outdoor and indoor units.

(3) Duplication of indoor unit number.

2.4.2 Checking Method by 7-Segment Display By using the 7-segments and check switch (PSW) on the PCB1 in the outdoor unit, total quantity of combined indoor units, 7-segments operation conditions and each part of refrigeration cycle, can be checked.

Checking Item

2

3

4

5

6

7

Output State of Outdoor Micro-Computer

Total of Thermo-ON Indoor Units Capacity

Running Frequency of Inverter Compressor MC1

Number of Running Compressor

Air Flow Ratio

Outdoor Expansion Valve MV1 Opening

Outdoor Expansion Valve MV2 Opening

PSW3

SEG2

PSW2

Checking Contents PSW2

PSW3

PSW3

PSW2

SEG1 YFAN1 YCH1 Y52C1

20C

Y20G

Y52C3 Y52C2

SEG1

Y212

SEG2

Y211

Backward Forward

7-Segment

1

PSW2

PSW3

Y52C5 Y52C6

PSW2

DC FAN

PSW3 PSW1

To start checking, press the "PSW2" switch for more than 3 seconds.

To proceed checking, press the "PSW2" switch for less than 2 seconds.

To proceed reversely, press the "PSW3" switch for less than 2 seconds.

To cancel this checking, press the "PSW2" switch for more than 3 seconds. The display will be changed to the indication one step before.

Then, press the "PSW2" switch once again for more than 3 seconds.

Y20A2

Check

Manual Defrost

Y20F1

PSW

Y20A1 Y20B Y52C4

(Unit) PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

~

~

(x

1 HP) 8

(Hz)

~

~

~

(%)

~

(%)

75

from Previous Page Checking Item 8

9

10

11

Outdoor Expansion Valve MV3 Opening

Outdoor Expansion Valve MVB Opening

Discharge Pressure (High)

Suction Pressure (Low)

Discharge Gas 12 Temperature on the Top of Compressor MC1 (TD1)

Discharge Gas 13 Temperature on the Top of Compressor MC2 (TD2)

Discharge Gas 14 Temperature on the Top of Compressor MC3 (TD3)

Discharge Gas 15 Temperature on the Top of Compressor MC4 (TD4)

Discharge Gas 16 Temperature on the Top of Compressor MC5 (TD5)

Discharge Gas 17 Temperature on the Top of Compressor MC6 (TD6)

PSW3

PSW2

Checking Contents PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

(For 40 and 42HP)

18 Evaporating Temperature 1 at Heating

~

(%)

~

(%)

~

(MPa)

~

~

(MPa)

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

~

(oC)

: Open-circuited : Short-circuited

19 Evaporating Temperature 2 at Heating

76

PSW2

PSW3

~ : Open-circuited : Short-circuited

(oC)

from Previous Page Checking Item 20

21

PSW3

Checking Contents

Evaporating Temperature 3 at Heating

Ambient Air Temperature (TO)

22 Control Information

23

24

25

26

27

28

PSW2

Estimated Running Current of Compressor MC1

Estimated Running Current of Compressor MC2

Estimated Running Current of Compressor MC3

Estimated Running Current of Compressor MC4

Estimated Running Current of Compressor MC5

Estimated Running Current of Compressor MC6

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

~

(oC)

: Open-circuited : Short-circuited

~ : Open-circuited : Short-circuited

~

(A)

Indicates running current of primary side of inverter.

~

(A)

~

(A)

~

(A)

~

(A)

~

(A)

(For 40 and 42HP)

~

Indoor Unit 29 Expansion Valve Opening

~

(No.0 Unit)

PSW3

PSW2

PSW2

PSW3

(No.0 Unit)

~

(%)

(No.F Unit)

(Indicates only the units number connected)

(No.F Unit)

~

(%)

77

from Previous Page Checking Item

PSW3

PSW2

Checking Contents

~

(No.0 Unit)

~

Indoor Unit Heat Exchanger 30 Liquid Pipe Temperature (Freeze Protection)

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

(No.0 Unit) (oC)

~

(No.F Unit) (No.F Unit) (oC)

~

(Indicates only the units number connected) Checking Contents

~

(No.0 Unit)

~

Indoor Unit Heat 31 Exchanger Gas Pipe Temperature

PSW3

PSW3

PSW2

PSW2

PSW3

(No.0 Unit) (oC)

~

(No.F Unit)

(Indicates only the units number connected)

~

~

(No.0 Unit) Indoor Unit 32 Intake Air Temperature

PSW2

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

(No.F Unit) (oC)

~ (No.0 Unit)

(oC)

~

(No.F Unit)

(Indicates only the units number connected)

~

Indoor Unit 33 Discharge Air Temperature

~

(No.0 Unit)

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

(No.F Unit) (oC)

~ (No.0 Unit)

(oC)

~

(No.F Unit)

(Indicates only the units number connected)

~

Indoor Unit 34 Capacity Setting

~

(No.0 Unit)

(No.F Unit)

(Indicates only the units number connected)

78

(No.F Unit) (oC)

~ (No.0 Unit) (x

1 HP) 8

Refer to the "Capacity Code of Indoor Unit" table for the capacity code indication.

(No.F Unit) (x

1 HP) 8

Refer to the "Capacity Code of Indoor Unit" table for the capacity code indication.

from Previous Page Checking Item

PSW3

PSW2

Checking Contents PSW2

~

Indoor Unit 35 Cause of Stoppage

~

(No.0 Unit)

PSW3

(No.0 Unit) Refer to page 71.

PSW3

PSW2

PSW2

PSW3

(No.F Unit)

(Indicates only the units number connected) Pressure Ratio Fall 36 Protection Degeneration Control

High-Pressure Rise 37 Protection Degeneration Control

Inverter Fin Temp.

38 Increase Protection Degeneration Control

Discharge Gas Temp.

39 Increase Protection Degeneration Control

Discharge Gas Temp.

40 Decrease Protection Degeneration Control

41

42

Current Protection Degeneration Control

Total Accumulated hours of Compressor MC1

(No.F Unit) Refer to page 71.

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

0: Degeneration Control is in Operation 1: Degeneration Control is not in Operation

~ (x 10 times hours)

43

Total Accumulated hours of Compressor MC2

displayed in 4 digit number

~ (x 10 times hours)

44

Total Accumulated hours of Compressor MC3

displayed in 4 digit number

~ (x 10 times hours)

45

Total Accumulated hours of Compressor MC4

displayed in 4 digit number

~ (x 10 times hours) displayed in 4 digit number

79

from Previous Page Checking Item

PSW3

PSW2

Checking Contents 46

Total Accumulated hours of Compressor MC5

PSW2

PSW3

~ (x 10 times hours)

47 Total Accumulated hours of Compressor MC6

PSW3

PSW2

PSW2

PSW3

displayed in 4 digit number

~ (x 10 times hours)

(For 40 and 42HP)

The Latest Alarm Code 48 Cause of Stoppage at Outdoor Unit

PSW3

PSW2

PSW2

PSW3

displayed in 4 digit number

The latest alarm code of stoppage cause is indicated.

49 Cause of Stoppage at Inverter

50 Cause of Stoppage at Fan Motor Controller

51

52

53

Total Capacity Setting of Indoor Unit

Total Quantity of Combined Indoor Unit

Address of Refrigerant System

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

PSW3

PSW2

PSW2

PSW3

~

~

~

(x

1 HP) 8

(sets)

~ Indicates setting address by DSW1

Returns to START "

80

"

2.4.3 Running Current of Compressor Inverter Primary Current The inverter primary current is estimated from the running current of the compressor MC1 indicated on 7-segments, as chart below.

220V

380-415V 25

50 45 40

20

30 25 Lower Limit 20 15 10

Invent Primary Current (A)

Invent Primary Current (A)

Upper Limit

Upper Limit

35

15

Lower Limit 10

5

5

0

5

10 15 20 25 30 35 40 Running Current of Compressor MC1 Indicated on 7- segment

0

5 10 15 20 Running Current of Compressor MC1 Indicated on 7- segment

Indicated Running Current of Compressor MC2, MC3, MC4, MC5, MC6 The running current of the compressor MC2, MC3, MC4, MC5, MC6 is detected by current sensor. (CT2 to CT6) Cause of Stoppage for Inverter (Content of Check Item "

Code

Cause

")

Remark Cause of Stoppage for Indication Corresponding Unit during Retry Alarm Code

Automatic Stoppage of Transistor Module (IPM Error) (Over Current, Decrease Voltage, Increase Temperature) Instantaneous Over Current Abnormal Inverter Fin Thermistor Electronic Thermal Activation Inverter Voltage Decrease Increase Voltage Abnormal Inverter Transmission Abnormal Current Sensor Instantaneous Power Failure Detection Reset of Micro-Computer for Inverter Earth Fault Detection for Compressor (Only Starting) Abnormal Power Source Phase

81

2.5

Protection Control Code on 7-Segment Display

(1) Protection control code is displayed on 7-segment when a protection control is activated.

(2) Protection control code is displayed while function is working, and goes out when released.

(3) When several protection control are activated, code number with higher priority will be indicated (see below for the priority order). (a) Higher priority is given to protection control related to frequency control than the other. <Priority Order> * Pressure Ratio Control * High-Pressure Increase Protection * Current Protection * Inverter Fin Temperature Increase Protection * Discharge Gas Temperature Increase Protection * Low-Pressure Decrease Protection * Reversing Valve Switching Control * Running Current Limit Control * High-Pressure Decrease Protection * Oil Return Control * Discharge Gas Superheat Decrease Protection (b) In relation to retry control, the latest retrial will be indicated unless a protection control related to frequency control is indicated.

Code

Protection Control

Code

Protection Control

Pressure Ratio Control (*)

Low-Pressure Increase Protection

High-Pressure Increase Protection (*)

Pressure Ratio Decrease Retry

Current Protection (*)

Low-Pressure Increase Retry

Inverter Fin Temperature Increase Protection

High-Pressure Increase Retry

Discharge Gas Temperature Increase Protection (*)

Over Current Retry of Constant Compressor

Low-Pressure Decrease Protection

Vacuum/Discharge Gas Temperature Increase Retry

Reversing Valve Switching Control

Discharge Gas SUPERHEAT Decrease Retry

Oil Return Control

Inverter Trip Retry

High-Pressure Decrease Protection

Insufficient Voltage/ Excessive Voltage Retry

Demand Current Control

Fan Motor Controller Fin Temperature Increase Protection

Discharge Gas SUPERHEAT Decrease Protection

Fan Motor Controller Trip Retry

In the case that degeneration control is activated, c is indicated in stead of 0. (*mark)

â&#x20AC;˘ Retry indication continues for 30 minutes unless a protection control is indicated. â&#x20AC;˘ Retry indication disappears if the stop signal comes from all rooms.

NOTE: The protection control code being indicated on 7-segment display is changed to an alarm code when the abnormal operation occurs. Also, the same alarm code is indicated on the remote control switch.

82

Table 2.1 Activating Condition of Protection Control Code For following the conditions as the temperature change, etc., the control of frequency, etc. is performed to prevent the abnormal conditions by the protection control.

The activating conditions of protection control are shown in the table below.

Code P01 P02 P03 P04

P05

P06

P07

P08

Protection Control Pressure Ratio Control High-Pressure Increase Protection Current Protection

Activating Condition Compression Ratio>9 => Frequency Decrease (Pd+0.1/Ps+0.1)<2.2 => Frequency Increase Pd>3.6MPa => Frequency Decrease Inverter Output Current>45A(220V), 23.5A(380,415V) => Frequency Decrease

Inverter Fin Temperature Inverter Fin Temperature>86oC Increase Protection => Frequency Decrease Temperature at the top of compressor is high Discharge Gas => Frequency Increase Temperature Increase (Maximum temperature is different Protection depending on the frequency.)

Low-Pressure is low => Frequency Decrease Low-Pressure (Minimum pressure is different depending on the Decrease Protection frequently) When Switching Reversing Valve ∆P<1.0MPa => Frequency Increase Switching Control ∆P>1.3MPa => Frequency Decrease Frequency less than aHz is maintained for more than 1 hour => Frequency>aHz Oil Return Control a

High-Pressure Decrease Protection

Discharge Pressure of Compressor Decrease => Frequency Increase (When Heating Operation)

P0A

Running Current Limit Control

Running Current for Comp.>Setting Value => Frequency Decrease

P12 P13

Pressure Ratio Decrease Retry Low-Pressure Increase Retry High-Pressure Increase Retry

-

-

-

∆P = Pd - Ps

Cooling Heating 75 84

P09

P11

Remarks Ps: Suction Pressure of Compressor Pd: Discharge Pressure of Compressor

Compression Ratio (Pd+0.1/Ps+0.1)<1.8) Ps>1.5MPa Ps>3.8MPa

Setting Value: Upper limit of total running current is set 80%, 70% and 60% at normal operation using input on PCB. When activating 3 times in 30 mins, "43" alarm is indicated.

When activating 3 times in 30 mins, "44" alarm is indicated.

When activating 3 times in 30 mins, "45" alarm is indicated.

Current>Maximum Value* or Current<1.0A P14

Overcurrent Retry of Constant Compressor

Maximum Value* Current (A)

Power Source 220V 380 to 415V 41.0 21.0

P15

Vacuum/Discharge Gas Temperature Increase Retry

In Case of Ps<0.09MPa over 12 minutes, Discharge Gas Temperature>132oC over 10 minutes or Discharge Gas Temperature>140oC over 5 seconds

P16

Discharge Gas SUPERHEAT Decrease Retry

Discharge Gas SUPERHEAT less than 10 deg. is maintained for 30 minutes.

P17

Inverter Trip Retry

Automatic Stoppage of Transistor Module, Activation of Electronic Thermal or Abnormal Current Sensor

P18

Insufficient Voltage /Excessive Voltage Retry

Insufficient/Excessive Voltage at Inverter Circuit or CB Connector Part

When activating 3 times in 30 mins, "39" alarm is indicated.

When activating 3 times in 30 minutes, "47"(Ps) or "08" (Discharge Gas) alarm is indicated.

When activating 3 times in 2 hours, "07" alarm is indicated.

When activating 3 times in 30 minutes, "51", "52" and "53" alarm is indicated.

When activating 3 times in 30 minutes, "06" alarm is indicated.

83

NOTES: 1. During protection control (except during alarm stoppage), the protection control code is indicated.

2. The protection control code is indicated during protection control and turns off when canceling the protection control.

3. After retry control, the condition of monitoring is continued for 30 minutes.

84

2.6

Self-Checking of PCB using Remote Control Switch

Following troubleshooting procedure is utilized for function test of PCB in the indoor unit and outdoor unit.

RUN/STOP Press

Stop Operation

FAN HIGH

SWING LOUVER

ON/OFF TIMER

SET TEMP.

COOL MED HEAT

LOW DEFROST DRY A/C + CENTRAL AUTO VENT H.STRG

TEMP

PCB Check Mode

ADDS

RN HR

ABNML

CHECK

MODE FAN SPEED

FILTER

T. RUN CHECK

RUN / STOP

Press two switches for 3 seconds.

UNIT

NO FUNCTION SERVICE

TEMP.

ON/OFF TIMER

VENTI LOUVER

RESET

CHECK TIME

(ex.) indication of Unit No. "0"

Indication of Unit Number

ADDS. RN

Indication

After 7 Seconds

Contents Normal Abnormality (Open-circuit, Short-circuit, etc.) in circuit for Intake Air Temp. Thermistor

Operating Automatic PCB Check

Discharge Air Temp. Thermistor Liquid Pipe Temp. Thermistor

Result

After Approx. 5 sec. (Max. 30 sec. in case of transmission failure between indoor unit and outdoor unit) Max. 3 Types of Abnormalities indicated.

Remote Thermistor Abnormality Gas Pipe Temp. Thermistor Remote Sensor Transmission of Central Station

Indoor Unit PCB

EEPROM

Abnormality (1)

Zero Cross Input Failure Transmission of Indoor Unit during

After 1 Seconds

This Checking Operation Transmission of Outdoor Unit

Abnormality (2)

49FC Input Failure 63H2 Input Failure

After 1 Seconds

Protection Signal Detection Circuit Phase Detection Transmission of Inverter

Abnormality (3)

Outdoor Unit PCB

High Pressure Sensor Comp. Discharge Gas Temp. Thermistor

After 1 Seconds to next page

Contents

Low Pressure Sensor Heat Exchanger Evaporation Temp. Thermistor Ambient Air Temp. Thermistor

For performing the above checking in the case that the wireless remote control switch is used with the bulit-in receiver part of the wall type indoor unit, perform the following procedures; (1) Turn OFF the power supply.

(2) Disconnect the connector (CN25) on PWB(M).

(3) Connect PC-P1H to the Terminal Board A, B. (4) Turn ON the power supply.

After completion of checking, turn OFF the power supply again and make connectors as before checking.

85

from previous page In case that there is the next unit

CHECK

TEMP

<Self-checking indication of the next unit>

Press

Repetition of Self-checking of Unit No. "0".

(ex.) indication of Unit No. "1"

ADDS. RN

After 7 Seconds

Result After 1 to 5 Seconds After 1 Second

Repetition

RESET

Release PCB Check Mode

Press

NOTE: (1)

If this indication is continued and “J1” is not shown, this indicates that each one of indoor units is not connected to the remote control switch. Check the wiring between the remote control switch and indoor unit.

(2) In this troubleshooting procedure, checking of the following part of the PCB’s is not available.

PCB in Indoor Unit: Relay Circuit, Dip Switch, Option Circuit, Fan Circuit, Protection Circuit PCB in Outdoor Unit: Relay Circuit, Dip Switch, Option Circuit (3) In the case that this troubleshooting is performed in the system using the central station, indication of the central station may change during this procedure. However, this is not abnormal.

ADDS. RN

86

2.7

Self-Checking of Remote Control Switch

Cases where CHECK switch is utilized.

1. If the remote control switch readouts malfunction.

2. For regular maintenance check.

Changing of LCD Indication

1

2

Turn ON the power source.

Simultaneously depress the following 3 switches. (During operation, they can be depressed.)

TEMP

MODE

Only for cancellation of EEPROM, depress the following 3 switches simultaneously during changing LCD indication.

TEMP

No.

The LCD indication changes as shown in the right figure.

TEMP.

HIGH COOL

For 1 second

1 DRY

SERVICE

ABNML

+

MED

2

HEAT A/C

3

Indicating Period (sec.)

LCD Indication

DEFROST CENTRAL

FILTER

TEMP 3

ADDS

LOW

RN HR

UNIT

NO FUNCTION SERVICE

MODE

FAN

4

For 1 second

H.STRG

After the LCD indication changes as shown in the right figure, the RUN indicator flashes twice.

SWING LOUVER

ON/OFF TIMER

SET

For 1 second

4

To 11

AUTO VENT

FAN HIGH

T. RUN CHECK

SWING LOUVER

ON/OFF TIMER

SET TEMP.

COOL MED

5

The LCD indication changes as shown below.

Depress all the switches (13 switches) one by one.

Every time the switch is depressed, the number of the indication of (A) part in the figure below increases one by one.

For 1 second

HEAT

LOW DEFROST DRY A/C + CENTRAL AUTO VENT H.STRG

ADDS

RN HR

UNIT

NO FUNCTION SERVICE

ABNML

FILTER

For 3 seconds

T. RUN CHECK

A

5

NOTES: 1. Any order of depressing switches is available.

2. Depressing 2 or more switches simultaneously is invalid and not counted.

6

The LCD indication changes as shown below.

The remote control switch automatically starts to check the transmission circuit.

Unless all the switches are depressed, the checking do not proceed to the next item.

In case that the transmission circuit is abnormal, the LCD indication remains as the left figure and the checking do not proceed to the next item.

To the next page

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The LCD indication changes as shown below.

The detected temperature of remote control thermostat is indicated at the part (A) in the figure below.

7

A

The LCD indication changes as shown below.

8

If the number "- -" or "FF" is indicated at the (A) part, the remote control thermostat is abnormal.

In case of depressing the RESET switch or leaving the switches for 15 seconds, the data of EEPROM (storage cell inside of the remote control switch) is cleared.

At this time, the number is indicated at the (A) part shown in the figure below. When the number "99" is indicated, EEPROM is abnormal.

In case that EEPROM is not canceled, depress the CHECK switch.

A

The number indicated at the (A) part is "99", the checking do not proceed to the next item.

Cancellation of EEPROM The LCD indication changes as shown below.

3

9 After several seconds are passed, the remote control switch is automatically activated again.

11

When the remote control switch is activated again, the RUN indicator is ON and the operation is started.

Therefore, depress switch and stop operation.

The LCD indication changes as shown below and the EEPROM is automatically canceled by the remote control switch.

The LCD indication changes as shown below.

RUN/STOP

12 10

88

NOTES: 1. In case that the operation is not automatically started when the remote control switch is activated again, the detection circuit for momentary stoppage may be abnormal.

However, it would not interfere the normal operation.

2. There is a case that the operation is automatically stopped after the automatic operation when the remote control switch is activated again.

After several seconds are passed, the remote control switch is automatically activated again.

In this case, the operation is not started automatically.

3. CAUTION ON REFRIGERANT LEAKAGE 3.1

Maximum Permissible Concentration of HFC Gas

The refrigerant R410A, charged in the SET-FREE FSN system, is an incombustible and non-toxic gas.

However, if leakage occurs and gas fills a room, it may cause suffocation.

The maximum permissible concentration of R410A in air is *0.3 kg/m3, according to the refrigeration and air conditioning facility standard (KHK S 0010) by the KHK (High Pressure Gas Protection Association) Japan.

Therefore, some effective measure must be taken to lower the R410A concentration in air below *0.3 kg/m3, in case of leakage.

3.2

Calculation of Refrigerant Concentration

(1) Calculate the total quantity of refrigerant R (kg) charged in the system connecting all the indoor units of rooms to be air-conditioned.

(2) Calculate the room Volume V (m3) of each room.

(3) Calculate the refrigerant concentration C (kg/m3) of the room according to the following equation.

R: Total Quantity of Charged Refrigerant (kg) = C: Refrigerant V: Room Volume (m3) Connection < *0.3 (kg/m3)

3.3

Countermeasure for Refrigerant Leakage According to KHK Standard

The facility shall be arranged as follows referring to the KHK standards, so that the refrigerant concentration will be below *0.3 kg/m3.

(1) Provide a shutterless opening which will allow fresh air to circulate into the room.

(2) Provide a doorless opening of 0.15% or more size to the floor area.

(3) Provide a ventilator, linked with a gas leak detector, of 0.4 m3/min. or more ventilating capacity per Japanese Refrigeration Ton (= compressor displacement m3/h / 5.7) of the air conditioning system utilizing refrigerant R410A. (50Hz/60Hz) RAS-34FSN ......................... 13.83/15.79 ton RAS-36FSN ......................... 13.83/15.79 ton RAS-38FSN ......................... 13.83/15.79 ton RAS-40FSN ......................... 16.26/18.71 ton RAS-42FSN ......................... 16.26/18.71 ton (4) Pay a special attention to the place, such as a basement, etc., where refrigerant can stay, since refrigerant is heavier than air. *: Use this value for a reference only, since this value is not fixed yet. Follow upon local regulations.

89

<Example> System A Outdoor Unit

System B Outdoor Unit

20HP

System A Refrigerant: 60kg

16HP

2

4

4

E

D

C

B

A

Floor 40m2

Floor 70m2

Floor 70m2

Floor 400m2

Floor 120m2

Gas Leak Detector Ventilator

5

5

5

5

3

3 Height 2.5m

Opening: 0.06m2

2m3/min

Room

R (kg)

V (m3)

C (kg/m3)

Countermeasure

A

50

300

0.17

-

B

110

1,000

0.11

C

60

175

0.34

0.06m Opening

D

60

175

0.34

0.06m2 Opening

C+D

60

350

0.171

E

60

100

0.6

2

3

2 m /min. Ventilator Linked with Gas Leak Detector

If local codes or regulations are specified, follow them. <Example> British Standard BS4434 1989 R410A Commercial Office Building Class D Occupancy MR = C V MR: Maximum Charge or Leakage of Refrigerant (kg) C: Maximum Allowable Concentration = 0.17 (kg/m3) V: Volume of Space (m3)

90

System B Refrigerant: 50kg