Backup Heater Overheated - Daikin altherma 3 M Service Manual

2.3.16 AA-01 – Backup heater overheated
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the water pressure. See
Possible cause: Water pressure is too low.
2 Check the water flow. See
Possible cause: Water flow is too low.
3 Check that all stop valves of the water circuit are open. See
4
circuit" [ 299].
Possible cause: Closed stop valve in the water circuit.
4 Purge the water circuit. See
Possible cause: Air in the water circuit.
5 Perform a check of the outdoor air thermistor. See "3.20 Thermistors" [
Possible cause: Faulty ambient air thermistor.
6 Perform a check of all expansion valves. See
Possible cause: Faulty expansion valve.
7 Check that all stop valves of the refrigerant circuit are open. See
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
8 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
9 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 286].
Possible cause: Refrigerant overcharge or shortage.
10 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Thermal protector is
activated. Measured
water temperature too
high.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
"4.3 Water circuit" [
"4.3 Water circuit" [
"4.3 Water circuit" [
"3.9 Expansion
4
286].
"4.2 Refrigerant
"4.2 Refrigerant circuit" [
Effect
Unit will stop operating.
2 Troubleshooting
|
4
299].
4
299].
"4.3 Water
4
299].
4
valve" [ 149].
circuit" [
"4.2 Refrigerant
4
286].
Reset
Manual reset via user
interface and manual
reset of backup heater
thermal protector.
4
248].
4
286].
Service manual
21