Troubleshooting by Indication on the Remote Controller
SiUS30-1301
206
Service Diagnosis
3.32 Inverter Compressor Startup Error
Error Code
L9
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
Detect the failure based on the signal waveform of the compressor.
Error Decision
Conditions
Starting the compressor does not complete.
Supposed
Causes
Stop valve is not opened
Defective compressor
Defective compressor connection
Large pressure difference before startup the compressor
Defective inverter PCB
Troubleshooting
Is it the
initial time to start after
installation?
Is a right
amount of refrigerant
charged?
Is
the stop valve
opened?
Refrigerant is
melting in refrigerant
oil. (The unit is out of power
supply for more than
6 hours.)
Is the
insulation
resistance of the
compressor more
than 100k
Ω
?
Are the
compressor lead
wires disconnected?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Correct the wiring then
supply the power to restart.
NO
NO
Go on to the next page.
(Starting error due to aged
operation.)
YES
YES
Fix the compressor lead wire.
NO
Charge a right amount of
refrigerant.
YES
NO
Open the stop valve.
YES
YES
Cancel the melting state of
refrigerant.
NO
NO
Cancel the melting state of
refrigerant.
YES