Gree U-MATCH IV SERIES, Service Manual

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96
U-Match Series DC
Inverter Service Manual
(2). G U H D 1 8 N K 3 F O / G U H D 2 4 N K 3 F O / G U H D 3 0 N K 3 F O / G U H D 3 6 N K 3 F O / G U H D 4 2 N K 3 F O /
GUHD48NK3FO/ GUHD36NM3FO/GUHD42NM3FO/GUHD48NM3FO/GUHD60NM3FO
Main Control Board
NO. SILK-SCREEN INTERFACE INSTRUCTION NO. SILK-SCREEN INTERFACE INSTRUCTION
1 AC-L Live wire input 10 H-PRESS
Pressure protection switch
for fan speed adjustment
2 AC-N Neutral wire input 11 HPP
Interface of high
pressure protection
3 PWR 1
Power supply interface to the drive
1-pin: DC bus voltage
3-pin: DC bus GND
12 LPP Interface of low pressure protection
4 DC_MOTOR2
Interface of DC fan motor
1-pin: DC bus voltage
2-pin: Suspended
3-pin: DC bus GND
4-pin: +15V
5-pin: Control signal input
6-pin: Not connected
13 OVC-COMP
Interface of compressor
overload protection
5 DC_MOTOR1
Interface of DC fan motor
1-pin: DC bus voltage
2-pin: Suspended
3-pin: DC bus GND
4-pin: +15V
5-pin: Control signal input
6-pin: DC fan motor feedback
14 T-SENSOR2
1&2 pin: Case temperature sensor
3&4 pin: Ambient
temperature sensor
5&6 pin: Discharge
temperature sensor
6 CN3
Power supply interface to the drive
1-pin: GND
2-pin: +18V
3-pin: +15V
15 FA
Interface of electronic
expansion valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;