Gree Versati III GRS-CQ4.0Pd/NhG-K Owner's Manual page 42

Air-to-water Heat Pump
CN16 10K temperature sensor (leaving water for the auxiliary electric heater)
CN16 20K temperature sensor (reserved)
CN8 15K temperature sensor (room) (CN5)
CN9 10K temperature sensor (room) (CN6)
CN7 Temperature sensor
CN6 Temperature sensor (CN9)
CN5 Temperature sensor (CN8)
CN20 Thermostat
CN21 Detection to welding protection for the auxiliary electric heater 1
CN22 Detection to welding protection for the auxiliary electric heater 2
CN23 Detection to welding protection for the water tank electric heater
CN24 Door-guard detection
CN25 Flow switch
CN26 Reserved
CN1 485-112V 4-pin
CN2 485-1communiction without12V 4-pin
CN3 485-2 communication without 12V 3-pin
CN4 485-2 communication with 12V 4-pin
PWR1
DC-MOTORO1
DC-MOTORO
Silk Screen
AC-L
N
PWR1
F1
4V
VA-1
HEAT
AC-L AC-N 4V
F1
VA-1
Live wire input of power supply
Neutral wire input of power supply
310V Supply 310V DC power to the drive
Fuse
4-way valve
E-heater of chassis
Electric heating tape
38
FB
HEAT
T-SENSOR2
CN5
T-SENSOR1
Introduction
SPLIT TYPE
FA
H_PRESS
CN7
CN8
CN9
COM-ESPE1
COM-ESPE2
LPP
HPP
CN2
T-SENSOR3