L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2 | Troubleshooting
2.4.20 L5-00 – Outdoor unit: Inverter instantaneous overcurrent
Service manual
32
6 Check ambient temperature. Check if outdoor unit location temperature
differs drastically.
7 Check if there is discharge air by-pass on installation location.
Possible cause: External noise. Check further on how to eliminate external
factors.
8 Perform a check of the inverter PCB. See
Possible cause: Faulty inverter PCB.
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" [ 137].
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 inverter PCB. See
Possible cause: Faulty inverter PCB.
6 Perform a check of the compressor. See "3.2 Compressor" [
Possible cause: Faulty compressor.
7 Check if the power supply is conform with the regulations. See
4
circuit" [ 135].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
Prerequisite: Stop the unit operation via the user interface.
"3.7 Inverter
Effect
Unit will stop operating.
4
137].
"4.2 Refrigerant
"4.2 Refrigerant circuit" [
"3.7 Inverter
4
PCB" [ 81].
Reset
Manual reset via user
interface.
4
circuit" [
"4.2 Refrigerant
4
137].
4
PCB" [ 81].
4 56].
"4.1 Electrical
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
137].