37
LAYOUT OF PCB BOARDS
rif Code Description
1 CN28 Output port L to refrigerant circuit board
2 CN22 Reserved
3 CN27 Output port N to refrigerant circuit board
4 CN3 Reserved
5 PE2 Port for grounding wire
6 DSP1 Digital display
7 CN17 Port for communication with refrigerant circuit board
8 PE1 Port for grounding wire
9 CN26 Reserved
10 CN10 Input port for neutral wire
11 CN11 Input port for line wire
12 CN9 Port for outdoor ambient temperature sensor and condenser temperature sensor
13 CN24 Input port for +12V/9V
14 CN1 Port for suction temperature sensor
15 CN8 Port for discharge temperature sensor
16 CN13 Port for high pressure switch
17 CN14 Port for low pressure switch
18 CN29 Port for communication with hydro module control board
19 CN4 Port for pressure sensor
20 CN30 Port for communication (Reserved)
21 CN2 Port for communication (Reserved)
22 CN33 Port for electronic expansion valve
23 CN16 Port for drain pan heater
24 CN6 Port for 4-way valve
25 CN5 Port for SV6 valve
26 CN7 Port for compressor electric heater1
27 CN18 Port for compressor electric heater2
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