2 | Troubleshooting
Service manual
36
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.34 EA-00 – Outdoor unit: Cool/heat switchover problem
Trigger Effect Reset
Room thermistor is NOT
functioning within
operation range.
Unit will NOT stop
operating.
Automatic reset after a
continuous operation for
some time.
If the error occurs too
soon: unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the 4‑way valve. See "3.24-way valve"[496].
Possible cause: Faulty 4‑way valve.
2 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.
3 Perform a check of the room thermistor:
▪ Measure the room temperature and compare to the room temperature
shown on the user interface (remote controller).
▪ If temperature shown on the user interface differs from the measured
temperature, replace the user interface (remote controller). See
documentation of the user interface (remote controller) for more
information.
Possible cause: Faulty room thermistor.
4 Check the communication wiring between the remote controller and the unit.
See "3.21User interface"[4266].
Possible cause: Faulty wiring between the remote controller and the unit.
5 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
6 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.
7 Check if the refrigerant circuit is clogged. See "4.2Refrigerant circuit"[4286].
Possible cause: Clogged refrigerant circuit.
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