12
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Troubleshooting
Installer reference guide
191
EPGA11~ EAV23DA6V
Daikin Altherma 3 H F
4P606487-1 – 2019.12
12.3.7 Symptom: The water pressure relief valve leaks
Possible causes
Corrective action
Dirt is blocking the water pressure relief
valve outlet
Check whether the pressure relief valve
works correctly by turning the red knob
on the valve counterclockwise:
▪
If you do NOT hear a clacking sound,
contact your dealer.
▪
If the water keeps running out of the
unit, close both the water inlet and
outlet shut-off valves first and then
contact your dealer.
12.3.8 Symptom: The space is NOT sufficiently heated at low outdoor temperatures
Possible causes
Corrective action
The backup heater operation is not
activated
Check the following:
▪
The backup heater operation mode is
enabled.
Go
to:
[9.3.8]:
Installer
settings
>
Backup heater
>
Operation
[4‑00]
▪
The backup heater overcurrent circuit
breaker is on. If not, turn it back on.
▪
The thermal protector of the backup
heater is NOT activated. If it has,
check the following, and then press
the reset button in the switch box:
-
The water pressure
-
Whether there is air in the system
-
The air purge operation
The backup heater equilibrium
temperature has not been configured
correctly
Increase the equilibrium temperature to
activate the backup heater operation at
a higher outdoor temperature.
Go to: [9.3.7]:
Installer settings
>
Backup heater
>
Equilibrium
temperature
[5‑01]
There is air in the system.
Purge air manually or automatically. See
the air purge function in the chapter
