SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 279
5.46.2 Compressor Startup Abnormality (6-12 HP Models)
Applicable
Models
RXMQ6-12AR
Error Code L9
Method of Error
Detection
Detect error according to the signal waveform of compressor.
Error Decision
Conditions
When compressor startup operation has not been completed.
Supposed
Causes
The stop valve is not opened
Defective compressor
Error in wire connections to compressor
Large differential pressure before compressor startup
Defective outdoor unit main PCB (RXMQ6AR)
Defective inverter PCB (RXMQ8-12AR)
Troubleshooting
YES
NO
NO
Apply power, and then restart
operation.
NO
Are the
leads of the
compressor
disconnected?
Connect the leads of the compressor.
YES
Is the
insulation
resistance of the
compressor 100 k
or more?
Replace the compressor (M1C).
NO
YES
YES
YES
Refrigerant
is stagnated.
(The unit is out of power
supply for more than 6
hours.)
Solve the refrigerant stagnation.
(Power should be supplied for more
than 6 hours.)
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the stop valve
open?
Startup for
the first time after
installation?
Is a proper
amount of refrigerant
charged?
Open the stop valve.
NO
Charge a proper amount of
refrigerant.
NO
Go to the next page.
(Startup failure in aging operation)
To Next Page
Loading...
