What to do if the tank disinfection function is NOT completed correctly (AH-error) in Daikin Altherma 3 H HT F Heat Pump?
- TTaylor FieldsSep 13, 2025
If the tank disinfection function in your Daikin Heat Pump isn't completing correctly (AH-error), it could be because 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. Also, if a large domestic hot water tapping happened recently before the programmed start-up of the disinfection function, program the start-up at least 4 hours later than the last expected large hot water tapping. Do NOT stop tank operation during disinfection.















