Gree Versati III GRS-CQ4.0Pd/NhH2-E Owner's Manual page 43

SPLIT TYPE
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 Other thermal by 220VAC
X24 Reserved
X25 Reserved
X26 Reserved
X27 2-way valve 1 is normally open
X28 2-way valve 1 is normally closed
X29 Reserved
X30 Reserved
X31 Reserved
X32 Reserved
X33 Reserved
X34 3-way valve signal
CN18 Build-in water pump signal(PWM)
CN19 Back-up water pump signal(PWM)-field supply
CN15 20K temperature sensor (inlet water)
CN15 20K temperature sensor (outlet water)
CN15 20K temperature sensor (refrigerant liquid line)
CN16 20K temperature sensor (refrigerant vapor line)
CN16 10K temperature sensor (leaving water for the optional electric heater)
CN16 Rreserved
CN8 Remote room temperature sensor
CN9 Water tank temperature sensor
CN7 Rreserved
CN6 Rreserved
CN5 Rreserved
CN20 Thermostat
CN21 Detection to welding protection for the optional electric heater 1
CN22 Detection to welding protection for the optional electric heater 2
CN23 Detection to welding protection for the water tank electric heater
CN24 Gate-control detection
CN25 Flow switch
CN26 Reserved
CN3 Communication with outdoor unit
CN4 Communication with control panel
Air-to-water Heat Pump Split Versati
Introduction
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