2 | Troubleshooting
Service manual
43
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
1 Perform a check of the low pressure switch. See "3.13 Low pressure
switch"[4167].
Possible cause: Faulty low pressure switch.
2 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.44 H5-00 – Malfunction of compressor overload protection
Trigger Effect Reset
Compressor overload
protection is defective.
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 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.
2 Check if the refrigerant circuit is clogged. See "4.2Refrigerant circuit"[4286].
Possible cause: Clogged refrigerant circuit.
3 Perform a check of the compressor. See "3.7Compressor"[4134].
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
4 Check liquid back issue. Check expansion valve operation. See "3.9Expansion
valve"[4149].
Possible cause: Expansion valve CANNOT keep minimum superheat of 3 K
while running as evaporator.
5 Check if the refrigerant circuit is correctly charged. See "4.2 Refrigerant
circuit"[4286].
Possible cause: Refrigerant overcharge.
6 Perform a check of the 4‑way valve. See "3.24-way valve"[496].
Possible cause: Faulty 4‑way valve.
7 Perform a check of the discharge pipe thermistor. See
"3.20Thermistors"[4248].
Possible cause: Faulty discharge pipe thermistor or connector fault.
8 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.