Dc Output Overcurrent - Daikin RZQ Series FCQ20EVA Service Manual

SiME281501E

4.29 DC Output Overcurrent

L5
Error Code
Applicable RZQ
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)
 Defective compressor coil (disconnection, poor insulation)
Supposed
 Compressor startup error (mechanical lock)
Causes
 Defective outdoor unit inverter PCB
 Instantaneous fluctuation of power supply voltage
 Defective compressor (if bearing is scratched)
 The stop valve is not opened.
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Check the installation conditions.
Is the stop valve open?
Is the compressor
coil disconnected or is the
insulation defective?
Turn the main power supply OFF, and
then disconnect the connection
between the compressor and inverter.
Service Diagnosis
NO
YES
YES
NO
A
Troubleshooting by Remote Controller
Open the stop valve.
Replace the compressor.
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