Inverter Compressor Startup Abnormality - Daikin Aurora Series Service Manual

Troubleshooting by Error Code

2.50 Inverter Compressor Startup Abnormality

L9
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect error according to the signal waveform of compressor.
Detection
Error Decision When compressor startup operation has not been completed.
Conditions
Supposed
Causes
Troubleshooting
243
The stop valve is not opened
Defective compressor
Error in wire connections to compressor
Large differential pressure before compressor startup
Defective inverter PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Startup for
the first time after
installation?
YES
Is a proper
amount of refrigerant
charged?
YES
Is the stop valve
open?
YES
Refrigerant is
melting (No power
applied for a period of 6
hours or more)
NO
Is the
insulation
resistance of the relevant
compressor 100 kΩ
or more?
YES
Are the
leads of the
compressor
disconnected?
NO
NO
NO
NO
YES
NO
YES
SiUS341802E
A
Go to the next page.
Charge a proper amount of
refrigerant.
Open the stop valve.
Eliminate the melting state of
refrigerant.
Eliminate the melting state of
refrigerant.
Connect the leads of the compressor.
Apply power, and then restart
operation.
Service Diagnosis