2 | Troubleshooting
Service manual
21
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 "4.3Water circuit"[4299].
Possible cause: Water pressure is too low.
2 Check the water flow. See "4.3Water circuit"[4299].
Possible cause: Water flow is too low.
3 Check that all stop valves of the water circuit are open. See "4.3 Water
circuit"[4299].
Possible cause: Closed stop valve in the water circuit.
4 Purge the water circuit. See "4.3Water circuit"[4299].
Possible cause: Air in the water circuit.
5 Perform a check of the outdoor air thermistor. See "3.20Thermistors"[4248].
Possible cause: Faulty ambient air thermistor.
6 Perform a check of all expansion valves. See "3.9Expansion valve"[4149].
Possible cause: Faulty expansion valve.
7 Check that all stop valves of the refrigerant circuit are open. See
"4.2Refrigerant circuit"[4286].
Possible cause: Closed stop valve in the refrigerant circuit.
8 Check if the refrigerant circuit is clogged. See "4.2Refrigerant circuit"[4286].
Possible cause: Clogged refrigerant circuit.
9 Check if the refrigerant circuit is correctly charged. See "4.2 Refrigerant
circuit"[4286].
Possible cause: Refrigerant overcharge or shortage.
10 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See "4.2Refrigerant circuit"[4286].
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.
2.3.16 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.
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