Gree GKH18K3HI - Page 82

U-Match Series Service Manual
79
NO.
SILK-SCREEN
INTERFACE
INTERFACE INSTRUCTION
1
AC-N
Neutral wire input
Neutral wire input
2
HEAT
Compressor electrical heater
Compressor electric heating belt
3
4WAY
4-way valve
4-way valve
4
OFAN1
AC fan motor
AC fan motor
5
FA
Electronic expansion valve line
1 to 4-pin: Drive impulse output;5-pin:
+12V;
Interface of electronic expansion valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;
6
LPP
Low pressure switch for system protection
(obligate)
Interface of low pressure protection
7
HPP
High pressure switch for
systemprotection(obligate)
Interface of high pressure protection
8
CN1
1&2 pin: Tube sensor
3&4 pin: Ambient temperature
5&6 pin: Air discharge
1&2 pin: Case temperature sensor
3&4 pin: Ambient temperature sensor
5&6 pin: Discharge temperature sensor
9
SENSOR
High pressure switch for fan speed
adjustment
Pressure protection switch for fan speed adjustment
10
COM-INNER
Communication interface
Communication interface
11
AC-L
Live wire input
Live wire input
12
COMP
Compressor C
Compressor C
GUHN36NM3HO/GUHN42NM3HO/GUHN48NM3HO/GUHN60NM3HO
Main Control Board