L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent - Daikin altherma 3 M Service Manual

2 | Troubleshooting
2.3.60 L5-00 – Outdoor unit: Inverter instantaneous overcurrent
Service manual
52
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
electrical hazards" [
5 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
Make sure to use thermal interface grease Shin Etsu G-776 (spare part number
2269571).
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
An output overcurrent is
detected by checking the
current that flows in the
inverter DC section.
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
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
2 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
3 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 286].
Possible cause: Refrigerant overcharge or shortage.
4 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.
5 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
6 Perform a check of the compressor. See "3.7 Compressor" [
Possible cause: Faulty compressor or miswiring of the compressor power
supply cable.
7 Check if the power supply is conform with the regulations. See
4
circuit" [ 284].
4
285].
Effect
Unit will stop operating.
4
286].
"4.2 Refrigerant circuit" [
"3.14 Main
"To prevent
Reset
Manual reset via user
interface.
"4.2 Refrigerant circuit" [
"4.2 Refrigerant
4
286].
4
PCB" [ 171].
4
134].
"4.1 Electrical
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
4
286].