Protection switches of module controller involve flow switch of this module, high/low pressure protection switch of each compressor, anti-frozen switch of evaporator and overload protection of outer fan. In addition, the constant-open contact of phase sequence check panel controls the power supply of module controller. If flow switch main module abnormal, whole system should shut down for protection. While unit model ON, controller works in single cold status; while unit model OFF, it is hot pump model. The selective sewitch of this unit model is only effective for main module. See table below: Switch 1
Switch 2
Function name
Descriptin
ON
ON
Single cold
Only cold generation model
OFF
OFF
Hot pump
Compressor cold/heat generation with accessory electric heater
Composition schematic drawing of module controller as followed: Circulation pump
Outer fan
Four-way valve 4
Four-way valve 3
Four-way valve 2
Four-way valve 1
Compressor 4
Compressor3
Compressor 2
Compressor 1
Electric heater
220V 50Hz
Total return water temperature Fuse
Total output water temperature Output water temperature
Transformer
Air-cooling cold/hot water module controller
Outdoor ambient temperature Address switch
Unit model switch
1#outer pipe temperature
Line controller
2# outer pipe temperature Protection shield switch
3# outer pipe temperature 4# outer pipe temperature
Water flow switch
Outer fan protection
Phase sequence protection
Anti-frost switch
High-pressure switch 1
Low-pressure switch 1
High-pressure switch 2
Low-pressure switch 2
High-pressure switch 3
Low-pressure switch 3
High-pressure switch 4
Low-pressure switcg 4
Linkage switch
Structure frame drawing of controller (2) structure frame drawing of controller Address set is four-digital dial code that can be set into 15 statuses as followed table: Information table of address set switch Switch 1 OFF OFF OFF OFF OFF
Switch 2 OFF OFF OFF OFF ON
Switch 3 OFF OFF ON ON OFF
Switch 4 OFF ON OFF ON OFF
Address code 0000(0) 0001(1) 0010(2) 0011(3) 0100(4)
Controller No. 1#module 2# module 3# module 4# module 5# module
OFF
ON
OFF
ON
0101(5)
6# module
OFF
ON
ON
OFF
0110(6)
7# module 53