Control and operation

Access and equipment of the cab

As long as the fan symbol 22 is flashing, the fan speed can be increased or reduced manually using the keys 2 or 3

Press the key 5 again, to return to automatic operation. the symbols 22 and 21 will go off, the symbol 20 is displayed again.

Air conditioning operation

Fig. 3-48 Air conditioning operation and Reheat-operation

Press the key 1 turn on the air conditioning operation. the symbol 15 is displayed. the control unit now turns the airco compressor on and off automatically. the control unit automatically adjusts the fan RPM.

Press the key 1 again, to turn off the air conditioning operation. the symbol 15 is no longer displayed, the airco compressor remains off.

Note!

In case of high outside temperature, and especially if the cab has been heated up by the sun, decrease the temperature inside the cab as far as possible before turning on the air conditioner.

Open the windows and the door for a few minutes and adjust the blower fan to maximum RPM via the keys 5 and 2.

Reheat-operation

In order to achieve a quick dehumification of the cab, as an example on morning, when setting the machine into operation, it may be advisable to briefly turn on the air conditioning operation even when the heater is allready operative.

Press the REHEAT-key 6: the symbol 14 is displayed, the compressor is constantly working, the fan of the heater and airconditioner is running at maximum RPM, the air flaps at the front window and at the legroom are open, as necessary the control unit switches on the heating so to maintain the adjusted cab temperature.

As soon as the windows are completely demisted, the Reheat-operation may be exited while pressing the REHEAT-key 6 again

Note!

To avoid overloading the starter motor and the batteries, turn on the air conditioning operation and the REHEAT-operation only after the engine is running.

The REHEAT-operation is turned off automatically after 60 minutes.

If the machine is used for a longer period of time without using the air conditioner, press the REHEAT key 6 about every 2 weeks so to turn on the airco compressor.

Recirculated air and fresh air operation

Fig. 3-49 Recirculated air and fresh air operation

The heating and air conditioning system can work either in recirculated air operation or in fresh air operation.

Pressing the key switch 8 will alternately change from recirculated air operation into fresh air operation: in recirculated air operation:

•the symbol 13 is displayed,

•the fresh air flap 33 in the rear cab wall is closed. in fresh air operation:

•the symbol 13 is no longer displayed,

•the fresh air flap 33 in the rear cab wall is open and an amount of fresh air is admitted into the cab (about 10%, depending on the contamination of the filters 31 and 32).

Note!

The best heating, resp. cooling effect is reached in recirculated air operation!

Air repartition

The adjustment of the air flow in the cab is achieved via the keys 9 to 12 and via the partly closing and revolving louvers 8a to 8d:

• 8a on the seat console

• 8b on the right control panel

• 8c on the front windshield

• 8d on the rear wall of the cab

To reach a maximal feeling of comfort:

For heating the air flow must be blown into the cab via the louvers 8a, 8b and eventualy 8c. This is obtained while actuating the keys 10, 11 and eventualy 12

For air conditioner operation the air flow must be blown into the cab via the louvers 8d and eventualy 8b. This is obtained while actuating the keys 9 and eventualy 12

Note!

To defrost or dehumidify the windshield quickly, blow the whole air flow only out of the louvers 8c at the front windshield and 8b on the right control panel.

In case of very high outside temperature, preferably close the louvers 8c to avoid an unnecessary warming up of the inside air along the windshield.

Changing the temperature from °Celsius to °Fahrenheit

Fig. 3-51 Switching over °Celsius - °Fahrenheit

Press the key 8 and keep it depressed. Press the key 3 at the same time. the display of the adjustet cab temperature is changed from °Celsius into °Fahrenheit.

Pressing again the keys 8 and 3 at the same time will cause the temperature to change back into °Celsius.

3.3Setting the machine into operation

3.3.1Notes on measures to be taken before starting the machine

Tasks to be carried out prior to commissioning

Remove the padlocks attached to the switch cabinet door for the transport of the machine.

Insulating resistors

During commissioning and after prolonged standstills of the machine, and also before connecting the excavator to the power mains, check the following insulating resistors:

–Stator winding of the main motor (checking the resistors between the winding and resistors between the winding and the stator housing)

–Winding of the starter transformer (if installed),

Input Terminals For The Main Switch

The measured values must always be higher than those specified in the operating manual of the motor manufacturer.

As a rule, the minimum value is 1000 ohm per 1 V operating voltage: e.g. 0.5 mega ohm for a 500 V motor and 6.6 mega ohm for 6.6 kV motor.

If the insulating values are lower, preheat the respective units using the installed auxiliary heater until the value of 1000 ohm per 1 V is reached.

If necessary, and if the mains voltage cannot be directly switched to the excavator (e.g. due to insufficient insulating resistors of the electric rotary connection), the auxiliary heaters can be powered by a separate 220 V or 380 V power source.

The connection to the external source and the important changes of the electrical system must be carried out by a qualified electrician.

Direction of rotation of the electrical motors

During commissioning and when re-commissioning the electrical system after major repairs, check the direction of rotation of the electrical motors.

To do this, briefly start the respective motor, shut it down and check whether the direction of rotation corresponds to the direction of the red arrow on the part between the motor and the pump distributor gear.

If the motor is powered through U1, V1, W1 or 1U, 1V, 1W from a direct mains L1, L2, L3, it rotates clockwise when looking at the shaft end.

By exchanging the 2 phases, the direction of rotation is reversed (before doing this, ensure that the motor is designed for operation in both directions of rotation).

Earthing terminal and earthing

The earthing terminal is located on a separate mount inside the terminal box; in certain models, it is located on a base or a cooling fin (motors of round design). It is marked with the following symbol:

Caution

Earthing the motor is compulsory. The earth connections must be established according to the applicable regulations (to protect workers).

Other checking

After commissioning and then again after approx. 50 operating hours, check the mounting bolts of the motor and the coupling element for correct tightening (see chapter 5 "Checking mounting bolts for proper fixture").

Check that the emergency off switch is operating correctly.

Immediately after starting, check that no abnormal vibrations are occuring at the bearings of the motor. Make sure that the ball bearings of the electrical motor have been properly greased. If necessary, complete the grease charge of the bearings, following the lubrication procedure in the manufacturer maintenance manual.

Tasks to be completed prior to machine start

Caution!

A fire can only be extinguished, if it is accessible.

Before starting the machine, open all locks of the hydraulic excavator panels. In the event of a fire, these doors can than be opened without delay to extinguish the fire.

Positions of the locks: see chapter "Maintenance".

Caution!

When the tasks listed below are completed while the machine is already at operating temperature, there is risk of injury from scalding by hot oil.

Daily before starting the machine

Check the oil level in the hydraulic tank, see the chapter "Maintenance". If required, remove any ice and snow from the motor hood, from the grate above the hydraulic oil cooler and from the cooling air aspiration mouth of the electric motor.

Check that all doors and covers are correctly closed, but not locked. Check that the doors of the electrical enclosures are closed.

Before first start after a longer standstill of the machine

Check the insulation resistance values of the stator windings of the electric motor as described in the chapter "Maintenance".

Before first start after the machine was diconnected from the power supply, resp. after important repairs at the machine

Immediately after starting, check that the sense of rotation of the motor is correct, this means that it coincides with the sense of the arrows on the motor housing. Otherwise the motor must be stopped immediately.

3.3.2Switching on the electrical system

Ignition key and buttons

Before completing the tasks described here, read the respective sections in chapter "Maintenance". 0

Switching on the electrical system

The doors of the main switch cabinet must be closed. Turn the ignition key to contact position 1

Press and then release the button S207 The main switch is switched on.

Note

The main switch is automatically switched off when the electrical box door is opened or when the emergency off switch is engaged. The electrical system has ti be reset by poushing during 5 seconds on S208.

Danger

If the main switch is off (S208 is switch on), certain components of the electrical system are still powered!

The electrical rotary connection, the switch cabinet heating, ventilation and lighting system, the operator's cab standstill heating, the hydraulic oil preheating system and the motor preheating system remain powered.

Switching on control system

Press and then release the button S183 The indicator light in the switch is on. Immediately after switching on the system, the keyboard and the monitoring display complete a self-test.

Note!

If no self-test of the keyboard and the monitoring display is performed when the key is set to contact position, check that the machine equipped with an immobiliser and has this immobiliser been activated (see section "Immobiliser" in this group)?

When switching on the machine, check all indicators and similar instruments for proper functioning.

All indicator lights, with the exception of the LED of the switch S22 (auxiliary light) must be briefly on.

The LIEBHERR logo must be shown on the monitoring display.

Display of service tasks that are due

Request

After the self-test is completed, a graphic symbol might be displayed, indicating that a pre-programmed routine service task is due.

The display usually showing the operating hours now shows the hours after which the next service task is due.

The service task symbol disappears after about 8seconds.

Emergency operation (option)

Set

3.3.3Starting the electric motor

Note !

A wrong start can cause damages for the electric motor ! Only operate the green switch S181 when the motor is stped.

If the motor is cold:

Do not operate more than 3 following starts. Do not operate more than 6 starts per hour.

If the motor is hot:

If the motor does not start after 2 starts, wait at least 10 minute before attempting to restart.

Starting procedure

Operate S181

The light in the green switch is on. The light H10 switch on when the hydraulik system is ready to work.

Starting procedure for exterior temperature below -18°C (0 °F).

To improve the starting ability of the motor at temperatures below -18 °C, we recommend to equip the machine with one or several of the original LIEBHERR cold starting kits (see Starting aids).

Hydraulic oil

The power of the main pumps is automatically limited when the hydraulic oil is cold (temperature below 8°C).

As soon the hydraulic oil temperature rises above 8°C, the full power of the machine is available.

Note !

The warm up phase for the hydraulic circuit can be activated and deactivated while programming the display.

During a warm up phase for motor or hydraulic oil, the symbol "current warm up phase" will be displayed on the screen.

3.3.4Shutting down units

Shutting down electric motor

Press the button S182.

The motor and the indicator light in the button S181 are switched off.

Switching off control circuit

Press the button S184

The indicator light in the button S183 is off.

Switching off main switch

Press the button S208.

The indicator light in the button S207 is off.

Danger

If the main switch is off (S208 is switch on), certain components of the electrical system are still powered!

The electrical rotary connection, the switch cabinet heating, ventilation and lighting system, the operator's cab standstill heating, the hydraulic oil preheating system and the motor preheating system remain powered.

Emergency shut-down of the units

Engage the emergency-stop switch S2-1

The power circuit is switched off.

Caution:

The emergency shut-down procedure must only be used in the event of an emergency.

After actuation of the emergency-stop switch S2-1, the switch remains locked and must first be released before the motor can be restarted.

To release the emergency-stop switch, press in the release button and turn the switch clockwise.

Caution:

The electrical system has ti be reset by poushing during 5 seconds on S208 After an emergency shut-down, you must wait at least 10 minutes before restarting the electric motor.

3.3.5Starting aids

Hydraulic oil preheating (optional extra)

The hydraulic oil can be preheated before starting using hydraulic oil preheating. It is working when the power supply is switched on.

The hydraulic oil preheating switches off when the control circuit is activated with the switch S183

3.3.6Immobilizer with electronic ignition key (option) System description

The system consists of a mechanical locking system and an independently functioning, electronically coded, immobilizer.

When activated, the electronically coded immobilizer disconnects the starting and main control circuits of the machine.

The control of the immobilizer is microcomputer based. The electronic key of the immobilizer is a transponder, which is securely integrated into the key handle.

Activation of the immobilizer

Turn the key in "0" position. the immobilizer will be automatically activated after 5 seconds.

Pull the key away from the ignition switch.

Note!

The immobilizer is activated and will stay activated, as long as the key stays in position '0', no matter if the key remains inserted or is pulled out of the switch.

Deactivation of the immobilizer

Insert the key into the ignition switch and turn it to the contact position "1". the immobilizer is deactivated.

Note!

Reading of the transponder will only take place when the mechanical key in the starting switch has made alive the control circuit of the machine (24V on clamp 15 ). This makes it necessary to first open the mechanical locking system before the electronic key is checked. Thus, the immobilizer cannot be manipulated as long as the ignition is turned off.

Master key and operation keys

5 Master key (red coloured)

6 Operation keys (blue coloured)

The master key 5 is marked by a red key knob.

The master key must be carefully stored as there is only one master key available for each immobilizer.

This master key is only to be used for imprinting new operation keys 6 (blue keys). The master key can not be used for deactivating the immobilizer. This prevents the usage of the master key for operating the machine.

At delivery there are only two operation keys joined to the immobilizer. Other operating keys can be ordered separately.

Imprinting procedure of an operation key the electronic system of the immobilizer now expects the operational key to be imprinted within the next 15 seconds.

To imprint an operation key, proceed as follows.

Insert the master key into the ignition switch and turn it to the contact position "1" .

After a maximum of 5 seconds turn the master key back to "0" position and take it off the ignition switch.

During this lapse of time, insert the operation key to be imprinted into the ignition switch and turn it to the contact position "1" . the key is registered as a new valid key.

Note!

If no key to be imprinted is recognized within 15 seconds, the imprinting procedure automatically terminates itself. To imprint several operation keys, the keys may be inserted into the ignition switch in succession. The individual keys must stay in position "1" for at least 1 second.

Up to 10 operation keys may be imprinted per master key. It is by the fact possible to enable one operation key to several immobilizers, e.g. to create a general operation key valid for several machines or for a machine pool.

Deleting imprinted operating keys

Deleting imprinted operating keys may be necessary after the loss of an imprinted key.

During the deletion procedure, all imprinted keys will be deleted. After all keys have been deleted, they must be re-imprinted to recover validity.

Insert the master key into the ignition switch, turn it to the contact position "1"and keep it for at least 20 seconds in this position. all imprinted operation keys for this master key are deleted. all existing operation keys may be reimprinted .

Note!

The code of the master key will not be deleted during the deletion procedure

Operation security

Should more than 5 invalid keys be used in the ignition switch within 1 minute, so the immobilizer will be activated for 15 minutes and will not accept any valid keys during this period. This procedure will prevent the 'trying out' of multiple keys and accidentally finding the correct key.

If several invalid keys are recognized without the ignition switch having been brought into the position '0', the immobilizer stays activated for 15 minutes and will not accept any valid keys during this period. Only after those 15 minutes have expired, and after the ignition switch has recognized the position '0', will valid keys be accepted again. This will prevent keys from being tested without using the mechanical ignition switch, e.g. when the ignition