14
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Troubleshooting
Installer reference guide
230
ERGA04~08EAV3(A) + EHBH/X04+08EA/EJ6V+9W
Daikin Altherma 3 R W
4P629085-1 – 2020.08
Possible causes
Corrective action
There is air in the system.
Purge air manually or automatically. See
the air purge function in the chapter
Too much heat pump capacity is used
for heating domestic hot water (applies
only to installations with a domestic hot
water tank)
Check if the
Space heating
priority
settings have been
configured appropriately:
▪
Make sure that the
Space heating
priority
has been enabled.
Go
to
[9.6.1]:
Installer
settings
>
Balancing
>
Space
heating priority
[5‑02]
▪
Increase the "space heating priority
temperature" to activate backup
heater operation at a higher outdoor
temperature.
Go
to
[9.6.3]:
Installer
settings
>
Balancing
>
Offset
BSH setpoint
[5‑03]
14.3.9 Symptom: The pressure at the tapping point is temporarily unusually high
Possible causes
Corrective action
Failing or blocked pressure relief valve.
▪
Flush and clean the complete tank
including the piping between pressure
relief valve and the cold water inlet.
▪
Replace the pressure relief valve.
14.3.10 Symptom: Tank disinfection function is NOT completed correctly (AH-error)
Possible causes
Corrective action
The disinfection function was
interrupted by domestic hot water
tapping
Program the start-up of the disinfection
function when the coming 4 hours NO
domestic hot water tapping is expected.
Large domestic hot water tapping
happened recently before the
programmed start-up of the disinfection
function
If in [5.6]
Tank
>
Heat up mode
the
mode
Reheat only
or
Sc
reheat
is selected, it is recommended
to program the start-up of the
disinfection function at least 4 hours
later than the last expected large hot
water tapping. This start-up can be set
by installer settings (disinfection
function).
If in [5.6]
Tank
>
Heat up mode
the
mode
Schedule only
is selected, it is
recommended to program a
Eco
action
3 hours before the scheduled start-up
of the disinfection function to preheat
the tank.
