Daikin RZQG71L9V1, Service Manual

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ESIE15-13C Troubleshooting by Remote Controller
Service Diagnosis 159
4.25 Output Overcurrent Detection
Remote
Controller
Display
L5
Applicable
Models
RZQG
Method of Error
Detection
The error is detected by converting the current flowing to power transistor into voltage with CT1
(DC current sensor).
Error Decision
Conditions
When overcurrent has run to power transistor.
(Actuated even by instantaneous overcurrent)
Supposed
Causes

Defective compressor (mechanical lock, poor insulation)
 Defective inverter PCB
 Instantaneous fluctuation of power supply voltage

Defective compressor (if bearing is scratched)

Stop valve is not opened.
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Replace the compressor.
YES
Check the installation conditions.
Open the stop valve.
Is the stop valve open?
NO
YES
NO
A
The compressor is
grounded and short
circuited.