Gree Versati III Owner's Manual page 48

Air-to-water Heat Pump
(3) GRS-CQ10Pd/NhG-M, GRS-CQ12Pd/NhG-M, GRS-CQ14Pd/NhG-M, GRS-CQ16Pd/NhG-M
CN20
CN21
CN22
CN23
CN24
CN25
CN10
CN8
CN 9
Silk Screen
AC-L Live wire of power supply
N Neutral wire of power supply
X3 To the ground
X20 E-heater of water tank
X21 E-heater 1
X22 E-heater 2
X23 Assistant heat by 220VAC
X24 Reserved
X25 Electric heater for the plate-type heat exchanger
X26 Reserved
X27 Electric magnetic 2-way valve 1 is normally open
X28 Electric magnetic 2-way valve 1 is normally closed
X29 High-power load control
X30 High-power load control
X31 Electric magnetic 3-way valve 1 is normally open (reserved)
X32 Electric magnetic 3-way valve 1 is normally closed (reserved)
X33 Electric magnetic 3-way valve 2 is normally open (water tank)
X34 Electric magnetic 3-way valve 2 is normally closed (water tank)
CN30 Signals 1, 2, 3, 4, power supply 5
CN31 Signals 1, 2, 3, 4, power supply 5
CN18 Interface to the variable-frequency water pump
CN19 Interface to the variable-frequency water pump
CN15 20K temperature sensor (inlet water)
CN15 20K temperature sensor (outlet water)
CN15 20K temperature sensor (refrigerant liquid line)
X26 X25 X24 X23 X22 X21 X20
CN16 CN15 CN19
CN18 CN3
X34 X33 X32 X31 X30 X29 X28 X27
CN4 CN1 CN2
Introduction
44
MONOBLOC TYPE
N
AC_L
X3