Gree U-MATCH IV SERIES, Service Manual

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