Daikin Altherma EHFH-D3V - Wiring Diagram: Indoor Unit

10 Technical data
Installation manual
29
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
10.2 Wiring diagram: Indoor unit
See the internal wiring diagram supplied with the unit (on the inside of the indoor unit switch box cover). The abbreviations used are listed
below.
Notes to go through before starting the unit
English Translation
Notes to go through before
starting the unit
Notes to go through before
starting the unit
X1M Main terminal
X2M Field wiring terminal for AC
X5M Field wiring terminal for DC
X6M Backup heater power supply
terminal
Earth wiring
Field supply
1
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Note 1: Connection point of the
power supply for the BUH
should be foreseen outside the
unit.
Note 1: Connection point of the
power supply for the backup
heater should be foreseen outside
the unit.
Backup heater power supply Backup heater power supply
3V (1N~, 230 V, 3 kW) 3V (1N~, 230 V, 3 kW)
User installed options User installed options
LAN adapter LAN adapter
Remote user interface Optional user interface
Ext. indoor thermistor External indoor thermistor
Ext outdoor thermistor External outdoor thermistor
Digital I/O PCB Digital I/O PCB
Demand PCB Demand PCB
Safety thermostat Safety thermostat
Main LWT Main 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
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
A10P Main user interface PCB
A13P * LAN adapter
A14P * Optional user interface PCB
A15P * Receiver PCB (wireless ON/OFF
thermostat)
CN* (A4P) * Connector
DS1 (A8P) * DIP switch
F1B # Overcurrent fuse backup heater
F1U, F2U (A4P) * Fuse 5A 250V for digital I/O PCB
K1M 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
Q4L # Safety thermostat
Q*DI # Earth leakage circuit breaker
R1H (A2P) * Humidity sensor
R1T (A2P) * Ambient sensor ON/OFF thermostat
R2T (A2P) * External sensor (floor or ambient)
R6T * External indoor or outdoor ambient
thermistor
S1S # Preferential kWh rate power supply contact
S2S # Electrical meter pulse input 1
S3S # Electrical meter pulse input 2
S6S~S9S * Digital power limitation inputs
SS1 (A4P) * Selector switch
TR1 Power supply transformer
X6M # Backup heater power supply terminal strip
X*, X*A, X*H* X*Y Connector
X*M Terminal strip
* Optional
# Field supply
Translation of text on wiring diagram
English Translation
(1) Main power connection (1) Main power connection
For preferential kWh rate power
supply
For preferential kWh rate power
supply
Indoor unit supplied from outdoor Indoor unit supplied from outdoor
Normal kWh rate power supply Normal kWh rate power supply
Only for normal power supply
(standard)
Only for normal power supply
(standard)
Only for preferential kWh rate
power supply (outdoor)
Only for preferential kWh rate
power supply (outdoor)
Outdoor unit Outdoor unit
Preferential kWh rate power
supply contact: 16 V DC
detection (voltage supplied by
PCB)
Preferential kWh rate power
supply contact: 16VDC
detection (voltage supplied by
PCB)
SWB Switch box
Use normal kWh rate power
supply for indoor unit
Use normal kWh rate power
supply for indoor unit
(2) Backup heater power supply (2) Backup heater power supply