Daikin EBLA11DAV3 - Too Long Domestic Hot Water Heat-Up Time Required

2 | 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 "3.3Backup heater"[4104].
Possible cause: Faulty backup heater.
2 Check if the power supply is conform with the regulations. See "4.1Electrical
circuit"[4284].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
4 Perform a check of the 3-way valve. See "3.13-way valve"[486].
Possible cause: Faulty 3‑way valve.
5 Check the installation for a leaking field installed domestic hot water tap. See
"4.3Water circuit"[4299].
Possible cause: Leaking field installed domestic hot water tap.
6 Check the settings of the backup heater [4‑00]. See "3.21 User
interface"[4266].
Possible cause: Backup heater NOT allowed.
7 Check the software and EEPROM version on the user interface and PCB. See
"3.21User interface"[4266].
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.