Circuit diagram
Electrical Wiring Work PAHCMW000
Contents Connection Port Function
RS485
CH1 (A+ / B-) Module Comm. Port Communication Port Modbus
CH2 (A+ / B-) IDU Comm. Port
Communication with Multi V
Outdoor
UNIVERSAL
INPUT
(Cooling/Heating
Setting)
UI1 Flow Switch Flow Switch Input by 3
rd
party
UI2 0-10V Set Temp Target Temp. Setting
UI3 Cooling Thermostat Signal Thermostat Cooling Signal
UI4 Heating Thermostat Signal Thermostat Heating Signal
UNIVERSAL
INPUT
(DHW Only)
UI1 Flow Switch Flow Switch Input by 3
rd
party
UI2 0-10V Set Temp Target Temp. Setting
UI3
DHW Temperature
Transmitter 0-10V
Measured Water Temp Input
by 3
rd
party 0 ~10 V sensor
UI4 DHW Thermostat Signal DHW Heating Signal
NTC
RI1 Water Inlet Sensor PHEX Water Inlet Sensor
RI2 Water Outlet Sensor PHEX Water Outlet Sensor
REMO +12V / SIG / GND LG Remote Controller -
SINGLE Reserved - -
DIGITAL
OUTPUT
DO1 Defrost/Mode
Output for defrost signal
and/or cool mode
DO2 Pump Output signal for pump on/off
DO3 Bypass
Output signal for PHEX
Bypass Valve
NTC
RI3 Thermistor Pipe In PHEX Ref. Inlet Pipe Sensor
RI4 Thermistor Pipe Out
PHEX Ref. Outlet Pipe
Sensor
EEV +12V / 1 / 2 / 3 / 4 Expansion Valve EEV Control
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