Daikin ETVH16SU23EA6V [252/296] Troubleshooting

Daikin ETVH16SU23EA6V [252/296] Troubleshooting
14 | Troubleshooting
Installer reference guide
252
EPRA14~18DAV3+W1 + ETVH16SU18+23EA6V
Daikin Altherma 3 H HT F
4P644738-1 – 2021.02
Possible causes Corrective action
Too much heat pump capacity is used
for heating domestic hot water
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 >
Priority temperature [5‑03]
14.3.10 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.
14.3.11 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 Schedule +
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.
The disinfection operation was stopped
manually: [C.3] Operation > Tank was
turned off during disinfection.
Do NOT stop tank operation during
disinfection.

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