Gree U-MATCH Series Service Manual page 99

U-Match Series DC Inverter Service Manual
NO. SILK-SCREEN
1 AC-L
2 AC-N
3 PWR 1
4 DC_MOTOR2
5 DC_MOTOR1
6 CN3
7 COMM1
8 CN2
9 CN1
10 H-PRESS
11 HPP
12 LPP
13 OVC-COMP
14 T-SENSOR2
15 FA
16 HEAT
17 VA-1
18 4V
INTERFACE
Live wire input
Neutral wire input
Control power output[1-
voltage,3- GND]
DC fan motor2
1-pin: Power supply of fan motor
3-pin: Fan GND
4-pin: +15V
5-pin: Signal control
6-pin: NC
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
Control power output[1-GND、2-18V、
3-15V]
Communication line [1-3.3V 、 2-TX 、
3-RX、4-GND]
Communication line with1-pin GND,
2-pin B and 3-pinA）
Communication line with 1-pin plus
12V, 2-pin B, 3-pin A and 4-pin GND
High pressure switch for fan speed
adjustment
High pressure switch
protection (obligate）
Low pressure switch
protection (obligate）
Compressor overload protection
1&2 pin: Tube sensor
3&4 pin: Ambient temperature
5&6 pin: Air discharge
Electronic expansion valve line
1 to 4-pin: Drive impulse output;5-pin:
+12V;
Compressor electrical heater
Chassis electrical heater
4-way valve
96
INTERFACE INSTRUCTION
Live wire input
Neutral wire input
Power supply interface to the
DC bus drive
1-pin: DC bus voltage
3-pin: DC bus GND
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
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
Power supply interface to the
drive
1-pin: GND
2-pin: +18V
3-pin: +15V
Communication needle stand of
main control drive
1-pin: +3.3V， 2-pin: TXD
3-pin: RXD， 4-pin: GND
Communication
with indoor unit
1-pin: GND, 2-pin: B，
3-pin: A
Communication
(reserved):
1-pin: +12V, 2-pin: B,
3-pin: A, 4-pin: GND
Pressure protection switch for
fan speed adjustment
for system
Interface
protection
for system
Interface
protection
Interface of compressor overload
protection
1&2 pin:
sensor
3&4 pin: Ambient temperature
sensor
5&6 pin: Discharge temperature
sensor
Interface of electronic expansion
valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;
Compressor electric heating belt
Chassis electric heating belt
4-way valve
needle stand
interface
of high pressure
of low pressure
Case temperature