Gree GKH42K3FI

U-Match Series DC Inverter Service Manual
110
 GUHD18NK3FO/GUHD24NK3FO/GUHD30NK3FO/GUHD36NK3FO/GUHD42NK3FO
/GUHD48NK3FO/GUHD36NM3FO/GUHD42NM3FO/GUHD48NM3FO/GUHD60NM3FO Main
Control Board
NO.
SILK-SCREEN
INTERFACE
INTERFACE INSTRUCTION
1
AC-L
Live wire input
Live wire input
2
AC-N
Neutral wire input
Neutral wire input
3
PWR 1
Control power output[1- DC bus
voltage,3- GND]
Power supply interface to the drive
1-pin: DC bus voltage
3-pin: DC bus GND
4
DC_MOTOR2
DC fan motor2
1-pin: Power supply of fan motor
3-pin: Fan GND
4-pin: +15V
5-pin: Signal control
6-pin: NC
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
5
DC_MOTOR1
DC fan motor1
1-pin: Power supply of fan motor
3-pin: Fan GND
4-pin: +15V
5-pin: Signal control
6-pin: Signal Feedback
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
65-pin: DC fan motor feedback
6
CN3
Control power output[1-GND、2-18V、
3-15V]
Power supply interface to the drive
1-pin: GND
2-pin: +18V
3-pin: +15V
7
COMM1
Communication line [1-3.3V、2-TX、
3-RX、4-GND]
Communication needle stand of main control drive
1-pin: +3.3V， 2-pin: TXD
3-pin: RXD， 4-pin: GND
8
CN2
Communication line with1-pin GND,
2-pin B and 3-pinA)
Communication needle stand with indoor unit
1-pin: GND, 2-pin: B，
3-pin: A
9
CN1
Communication line with 1-pin plus
12V, 2-pin B, 3-pin A and 4-pin GND
Communication interface (reserved):
1-pin: +12V, 2-pin: B,
3-pin: A, 4-pin: GND