SiUS371901E Troubleshooting by Error Code
Service Diagnosis 318
3.49 Inverter PCB Abnormality
Error Code L1
Applicable
Models
All outdoor unit models
Method of Error
Detection
Detect according to current value detected during the output of waveform before compressor
startup
Detect according to current value detected with the current sensor during synchronous
operation for startup
Error Decision
Conditions
When overcurrent flows during the output of waveform
When the current sensor error during synchronous operation
When IPM error occurs
Supposed
Causes
Inverter PCB
IPM failure
Current sensor failure
Drive circuit failure
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