Compressor Overcurrent - Daikin REYQ-XA Service Manual

Troubleshooting by Error Code

3.54 Compressor Overcurrent

L8
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect current flowing through the power transistor.
Detection
Error Decision When the secondary-side inverter current exceeds a certain value.
Conditions
Supposed
Causes
Troubleshooting
327
Compressor overloaded
Wiring disconnection in compressor coil
Disconnection of compressor wiring
Defective inverter PCB
Incorrect power supply voltage
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the stop valve open?
Check the compressor cable
for disconnection and flaws.
Are the
Power OFF leads of the relevant
compressor
normal?
Are
wiring and wire
connections to the relevant
compressor
normal?
The
insulation
resistance of the
relevant compressor is
100 kΩ or less to
ground.
The
internal wiring of
the compressor coil is
defective.
A
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
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SiUS371901E
Open the stop valve.
Replace the leads of the
relevant compressor.
Rectify the wiring and
wire connections.
Replace the
compressor.
Replace the
compressor.
Service Diagnosis