Booster Heater Overheated - Daikin altherma 3 M Service Manual

2.3.18 AC-00 – Booster heater overheated
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Possible cause: Increased water temperature due to an external heat source.
5 Perform a check of the backup heater thermal protector. See
heater thermal protector" [
Possible cause: Faulty backup heater thermal protector.
6 Perform a check of the outlet water after backup heater thermistor. See
"3.20 Thermistors" [
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.
Trigger
Thermal protection of
booster heater does NOT
have any feedback signal
anymore.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the water flow. See
Possible cause: Water flow is too low.
2 Purge the water circuit. See
Possible cause: Air in the water circuit.
3 Check the water circuit for an external heat source. See
4
circuit" [ 299].
Possible cause: Increased water temperature due to an external heat source.
4 Check the domestic hot water tank and booster heater related settings. See
"3.21 User interface" [
Possible cause: Faulty booster heater settings.
5 Check that the bridge connector X21A of the hydro PCB is correctly
connected. See "3.12 Hydro
Possible cause: Open jumper X21A on hydro PCB.
6 Perform a check of the booster heater thermal protector. See
heater thermal protector" [
Possible cause: Faulty booster heater thermal protector.
4
121].
4
248].
"3.12 Hydro
Effect
Error will be triggered
when bridge connection
over booster heater
contact is NOT made.
"4.3 Water circuit" [
"4.3 Water circuit" [
4
266].
4
PCB" [ 160].
4
133].
2 Troubleshooting
|
"3.4 Backup
4
"3.3 Backup heater" [ 104].
4
PCB" [ 160].
Reset
Manual reset via user
interface when bridge
connection is made.
4
299].
4
299].
"3.6 Booster
"4.3 Water
Service manual
23