Gree GFH09K3FI

95
U-Match Series DC
Inverter Service Manual
2.3 Interface
(1). GUHD09NK3FO/GUHD12NK3FO Mainboard
6
1
2
7 11
12
13
14
20
21
22
24
23
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543 8 9
19
10
15
16
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17
No. SILK-SCREEN INTERFACE INSTRUCTION No. SILK-SCREEN INTERFACE INSTRUCTION
1 LX_2 PFC reactor wire (yellow) 2 LX_1 PFC reactor wire (white)
3 W Compressor Phase W 4 V Compressor Phase V
5 U Compressor Phase U 6 DC-BUS (Reserved)
7 DC_MOTOR (Reserved) 8 - Compressor interface
9 DC-MOTOR1 Interface of outdoor fan motor 10 CN14/CN15 Interface of CPU board
11 E1 (Reserved) 12 E2
Grounding wire (yellow-
green lead-out wire)
13 AC-L Live wire input (red) 14 AC-N Neutral wire input (white)
15 O_HEAT_L (Reserved) 16 I_HEAT_N (Reserved)
17 O_HEAT_N (Reserved) 18 I_HEAT_L (Reserved)
19 H-PRESS Pressure switch 20 VA-1 Chassis electric heating belt
21 HEAT Compressor electric heating belt 22 4V 4-way valve
23 BACK_BUMP_L (Reserved) 24 BACK_BUMP_N (Reserved)
25 E3
Grounding wire (yellow-
green lead-out wire)
26 CN66
Communication interface between
indoor unit and outdoor unit
27 CN65 (Reserved) 28 HPP High pressure switch (reserved)
29 LPP Low pressure switch (reserved) 30 OVC-COMP Compressor overload switch
31 FA Electronic expansion valve 32 T-SENSOR1(In) (Reserved)
33 T-SENSOR1(Mid) (Reserved) 34 T-SENSOR1(Out) (Reserved)
35 T-SENSOR2(Tube) Tube temperature sensor 36 T-SENSOR2(Ambi) Ambient temperature sensor
37 T-SENSOR2(Exhaust) Discharge temperature sensor 38 T-SENSOR3 (Reserved)
39 SW4 (Reserved) 40 SW3 (Reserved)
41 A-DRIVE (Reserved) 42 JTAG1 (Reserved)