Booster Heater Overheated; Tank Disinfection Function Not Completed Correctly - Daikin EBLA04E V Series Service Manual

3.3.24 AC-00 – Booster heater overheated
3.3.25 AH-00 – Tank disinfection function not completed correctly
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Trigger
Bridge connection over
booster heater contact is
NOT made.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check that the bridge connector is correctly connected to X21A of the hydro
PCB. See "7.2 Wiring
Possible cause: Open jumper on X21A on hydro PCB.
2 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.
Trigger
Disinfection setpoint is
NOT reached within
6 hours or NOT kept for
the required time.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check when the disinfection is scheduled. Schedule it when there is little
chance that water will be tapped so that the disinfection can finish in time.
Possible cause: Large quantity of hot water has been tapped during/before
disinfection.
2 Check the backup heater settings [2‑00] to [2‑04] and [4‑00]. See
4
interface" [ 234].
Possible causes:
▪ Backup heater is restricted during disinfection,
▪ Backup heater NOT allowed.
3 Check the domestic hot water tank and booster heater related settings. See
"4.20 User interface" [
Possible cause: Faulty booster heater settings.
Effect
Unit will NOT stop
operating.
4
diagram" [ 281].
"4.12 Hydro
Effect
Unit will NOT stop
operating.
4 234].
3 | Troubleshooting
Reset
Manual reset via user
interface when bridge
connection is made.
4
PCB" [ 175].
Reset
Automatic reset when
disinfection is completed.
"4.20 User
Service manual
draft – 31/05/2022 15:53
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