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Troubleshooting
Service manual
34
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
3.3.23 AA-01 – Backup heater overheated
Trigger
Effect
Reset
Thermal protector is
activated. Measured
water temperature too
high.
Unit will stop operating.
Manual reset via user
interface and manual
reset of backup heater
thermal protector.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Possible cause:
Water pressure is too low.
2
Possible cause:
Water flow is too low.
3
Possible cause:
Air in the water circuit.
4
Check the water circuit for an external heat source. See
265].
Possible cause:
Increased water temperature due to an external heat source.
5
Perform a check of the backup heater thermal protector. See
Possible cause:
Faulty backup heater thermal protector.
6
Perform a check of the outlet water after backup heater thermistor. See
Possible cause:
Faulty outlet water after backup heater thermistor.
7
Perform a check of the backup heater. See
Possible cause:
Faulty backup heater.
8
Perform a check of the hydro PCB. See
Possible cause:
Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
draft – 31/05/2022 15:53
Summary of Contents for EBLA04E V Series
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