Output Overcurrent Detection - Daikin SkyAir GQI-Eco Series Service Manual

SiBE281013

4.23 Output Overcurrent Detection

L5
Remote
Controller
Display
Applicable RZQG
Models
Method of Error The error is detected by converting the current flowing to power transistor into voltage with CT1
(DC current sensor).
Detection
Error Decision When overcurrent has run to power transistor.
(Actuated even by instantaneous overcurrent)
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the installation conditions.
Is the stop valve open?
YES
The compressor is
grounded and short
circuited.
NO
A
Service Diagnosis
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.
NO
YES
Troubleshooting by Remote Controller
Open the stop valve.
Replace the compressor.
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