Wiring Diagram: Indoor Unit - Daikin ERGA04DAV3A Installer's Reference Manual

14 Technical data
14.4

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
Notes to go through before
starting the unit
X1M
X2M
X5M
X6M
1
Note 1: Connection point of the
power supply for the BUH/BSH
should be foreseen outside the
unit.
Backup heater power supply
1N~, 230 V
3~, 230 V
3N~, 400 V
User installed options
LAN adapter
Remote user interface
Ext. indoor thermistor
Ext outdoor thermistor
Digital I/O PCB
Demand PCB
Main LWT
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
Ext. thermistor
Heat pump convector
Add LWT
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
Ext. thermistor
Heat pump convector
Position in switch box
English
Position in switch box
Legend
A1P Main PCB
A2P * On/OFF thermostat (PC=power circuit)
A3P * Heat pump convector
A4P * Digital I/O PCB
Installer reference guide
92
Translation
Notes to go through before
starting the unit
Main terminal
Field wiring terminal for AC
Field wiring terminal for DC
Backup heater power supply
terminal
Earth wiring
Field supply
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Note 1: Connection point of the
power supply for the backup
heater/booster heater should be
foreseen outside the unit.
Backup heater power supply
1N~, 230 V
3~, 230 V
3N~, 400 V
User installed options
LAN adapter
User interface used as room
thermostat
External indoor thermistor
External outdoor thermistor
Digital I/O PCB
Demand PCB
Main leaving water temperature
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
External thermistor
Heat pump convector
Additional leaving water
temperature
On/OFF thermostat (wired)
On/OFF thermostat (wireless)
External thermistor
Heat pump convector
Translation
Position in switch box
Final English - Tanslations in progress
A8P * Demand PCB
A9P Status indicator
A10P MMI (= user interface connected to the
indoor unit) – Power supply unit PCB
A11P MMI (= user interface connected to the
indoor unit) – Main PCB
A12P MMI display PCB
A13P * LAN adapter
A14P * User interface used as room thermostat –
PCB
A15P * Receiver PCB (wireless On/OFF thermostat)
B1L Flow sensor
B1PR Refrigerant pressure sensor
B1PW Water pressure sensor
CN* (A4P) * Connector
DS1(A8P) * DIP switch
E1H Backup heater element (1 kW)
E2H Backup heater element (2 kW)
E3H Backup heater element (3 kW)
E*P (A9P) Indication LED
F1B # Overcurrent fuse backup heater
F1T Thermal fuse backup heater
F1U, F2U (A4P) * Fuse 5 A 250 V for digital I/O PCB
FU1 (A1P) Fuse T 5 A 250 V for PCB
FU2 (A10P) Fuse T 1.6 A 250 V for PCB
K1M, K2M Contactor backup heater
K5M Safety contactor backup heater
K*R (A1P-A4P) Relay on PCB
M1P Main supply pump
M2P # Domestic hot water pump
M2S # 2-way valve for cooling mode
M3S 3-way valve for floorheating/domestic hot
water
P1M MMI display
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 (A1P ) Outlet water heat exchanger thermistor
R1T (A2P) * Ambient sensor On/OFF thermostat
R1T (A14P) * Ambient sensor user interface
R2T (A1P) Outlet backup heater thermistor
R2T (A2P) * External sensor (floor or ambient)
R3T Refrigerant liquid side thermistor
R4T Inlet water thermistor
R5T, R8T Domestic hot water thermistor
R6T * External indoor or outdoor ambient
thermistor
S1S # Preferential kWh rate power supply contact
S2S # Electrical meter pulse input 1
ERGA04~08DAV3(A) + EHVH/X04+08S18+23DA
Daikin Altherma – Low temperature split
4P495248-1 – 2017.12