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Troubleshooting
Service manual
25
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
2.3.20 AJ-03 – Too long domestic hot water heat-up time required
Trigger
Effect
Reset
Domestic hot water
heat‑up time >6 hours.
Unit will switch to space
heating/cooling for
3 hours.
Automatic reset after a
domestic hot water
heat‑up time <6 hours.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Perform a check of the backup heater. See
104].
Possible cause:
Faulty backup heater.
2
Check if the power supply is conform with the regulations. See
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance >4%),
▪
Power drop,
▪
Short circuit.
3
Perform a check of the hydro PCB. See
160].
Possible cause:
Faulty hydro PCB.
4
Perform a check of the 3-way valve. See
Possible cause:
Faulty 3‑way valve.
5
Check the installation for a leaking field installed domestic hot water tap. See
Possible cause:
Leaking field installed domestic hot water tap.
6
Check the settings of the backup heater [4‑00]. See
266].
Possible cause:
Backup heater NOT allowed.
7
Check the software and EEPROM version on the user interface and PCB. See
Possible cause:
Mismatch between the software ID and EEPROM on the PCB
or user interface.
8
Check that the domestic hot water consumption is NOT too large. Lower if
needed.
Possible cause:
Domestic hot water consumption too large.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Summary of Contents for ALTHERMA
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