Output Overcurrent Detection - Daikin ZQG71~140L7V1B Service Manual

ESIE12-06

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
Detection (DC current sensor).
Error Decision
When overcurrent has run to power transistor.
Conditions (Actuated even by instantaneous overcurrent)
Supposed  Defective compressor (mechanical lock, poor insulation)
Causes  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.
Check the installation conditions.
Is the stop valve open?
YES
The compressor is
grounded and short
circuited.
NO
A
Service Diagnosis
NO
YES
Troubleshooting by Remote Controller
Open the stop valve.
Replace the compressor.
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