16 | Technical data
Installer reference guide
271
ERGA04~08E + EHVH04+08SU18+23E
Daikin Altherma 3 R F
4P629090-1C – 2022.08
English Translation
On/OFF thermostat (wired) ON/OFF thermostat (wired)
On/OFF thermostat (wireless) ON/OFF thermostat (wireless)
Ext. thermistor External thermistor
Heat pump convector Heat pump convector
Add LWT Additional leaving water temperature
On/OFF thermostat (wired) ON/OFF thermostat (wired)
On/OFF thermostat (wireless) ON/OFF thermostat (wireless)
Ext. thermistor External thermistor
Heat pump convector Heat pump convector
Position in switch box
English Translation
Position in switch box Position in switch box
Legend
A1P Main PCB
A2P * ON/OFF thermostat (PC=power circuit)
A3P * Heat pump convector
A4P * Digital I/O PCB
A8P * Demand PCB
A11P Main PCB of the MMI (=user interface of the indoor
unit)
A14P * PCB of the dedicated Human Comfort Interface
(BRC1HHDA used as room thermostat)
A15P * Receiver PCB (wireless ON/OFF thermostat)
A20P * WLAN module
CN* (A4P) * Connector
DS1 (A8P) * DIP switch
F1B # Overcurrent fuse backup heater
F1U, F2U (A4P) * Fuse 5A 250V for digital I/O PCB
K1A, K2A * High voltage Smart Grid relay
K1M, K2M Contactor backup heater
K5M Safety contactor backup heater
K*R (A4P) Relay on PCB
M2P # Domestic hot water pump
M2S # 2-way valve for cooling mode
PC (A15P) * Power circuit
PHC1 (A4P) * Optocoupler input circuit
Q1L Thermal protector backup heater
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