L5-00" - Output Overcurrent Detection - Daikin SA R32 Sky-Air RZAG-L Service Manual

ESIE16-03B | Part 2. Troubleshooting
Possible cause
Faulty compressor.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Faulty outdoor fan motor.
Faulty capacity adapter on outdoor PCB.
External factory (e.g. electrical noise).
(cause when error is reset after power
reset, and error happens again after a
while).
2.2.2.17. "L5-00" – Output overcurrent detection
Trigger
Outdoor inverter PCB detects overcurrent
to power transistor.
Possible cause
Refrigerant circuit is clogged.
Humidity in refrigerant (ice formation in
expansion valve).
Non condensables in refrigerant.
Faulty outdoor inverter PCB.
Faulty compressor.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Page 36
SA R32 Sky-Air RZAG-L
Check
Check compressor (see "Compressor" on
page 49).
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back issue)
(see "Electronic expansion valve" on
page 50).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check the fan motor (see "Fan motor" on
page 52).
Check fan motor connections and wiring.
Check if the correct adapter is installed.
Check if the correct spare part is installed.
Check for source which could cause elec-
trical interference.
Effect
Unit will stop operating.
Check
Check for possible blockage.
Check for humidity in the refrigerant.
Check for non condensables in refriger-
ant.
Check outdoor inverter PCB.
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check compressor (see "Compressor" on
page 49).
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back issue)
(see"Electronic expansion valve" on
page 50).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
2.2. Error based troubleshooting
Corrective action
Replace compressor when required (see
"Replacing compressor" on page
Investigate reason of breakdown.
Replace expansion valve when required
(see "Replacing expansion valve body" on
page 81).
Fix possible leak.
Adjust power supply when required.
Power reset via outdoor unit.
Replace fan motor when required (see
"Replacing DC fan motor assembly" on
page 79).
Adjust wiring when required.
Adjust capacity adapter when required.
Avoid electrical interference.
Reset
Manual reset via user interface.
Corrective action
Replace blocked part when required.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB (see
"Replacing main PCB" on page
Replace compressor when required (see
"Replacing compressor" on page
Replace expansion valve when required
(see "Replacing expansion valve body" on
page 81).
Fix possible leak.
Adjust power supply when required.
Power reset via outdoor unit.
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| Version 1.1