Gree GUHD09NK3FO Service Manual page 100

7 COMM1
8 CN2
9 CN1
(3). GUHD18NK3FO/GUHD24NK3FO/GUHD30NK3FO/GUHD36NK3FO/GUHD42NK3FO
1). Driving Board
1 2 3 4
No. Printing
1 L2_2
3 N
5 COMM/COMM1
7 PWR
9 L2-1
11 P-OUT
13 W
15 U
Communication needle stand
of main control drive
1-pin: +3.3V,
2-pin: TXD
3-pin: RXD,
4-pin: GND
Communication needle
stand with indoor unit
1-pin: GND,
2-pin: B,
3-pin: A
Communication interface
(reserved):
1-pin: +12V, 2-pin: B,
3-pin: A, 4-pin: GND
15 14 13 12 11
Interface
PFC induction wire (blue)
Neutral wire input (white)
Communication interface
Control power input
PFC induction wire (yellow)
(Reserved)
Compressor Phase W
Compressor Phase U
16 HEAT
17 VA-1
18 4V
10 9 8
5
No. Printing
2 L1_1
4 AC-L
6 JTAG1
8 DC-BUS1
10 L1-2
12 G-OUT
14 V
U-Match Series DC
Inverter Service Manual
Compressor electric heating belt
Chassis electric heating belt
4-way valve
7
6
Interface
PFC induction wire (brown)
Live wire input (red)
(Reserved)
Bus electric discharging
interface (for testing)
PFC induction wire (white)
(Reserved)
Compressor Phase V
97