Daikin Altherma EHBH08DA6V7 - 12.3.8 Symptom: The pressure at the tapping point is temporarily unusually high; 12.3.9 Symptom: Decoration panels are pushed away due to a swollen tank; 12.3.10 Symptom: Tank disinfection function is NOT completed correctly (AH-error)

12 | Troubleshooting
Installer reference guide
202
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
Possible causes Corrective action
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]
12.3.8 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.
12.3.9 Symptom: Decoration panels are pushed away due to a swollen tank
Possible causes Corrective action
Failing or blocked pressure relief valve. Contact your local dealer.
12.3.10 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.