Daikin Altherma 3 R W, Руководство по установке для специалистов, Страница: 259 / 296

14 | Troubleshooting
Installer reference guide
259
ERGA04~08EA + EHBH/X04+08EF
Daikin Altherma 3 R W
4P629085-1B – 2021.11
Possible causes Corrective action
There is air in the system. Purge air manually or automatically. See
the air purge function in the chapter
"11 Commissioning" [
4
236].
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.