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Troubleshooting by Remote Controller
SiBE341027
134
Service Diagnosis
2.20 Inverter PCB Abnormality
Remote
Controller
Display
L1
Applicable
Models
RQYQ-PY1B
Method of Error
Detection
Detect error by current value during waveform output before compressor startup.
Detect error by current sensor value during synchronized operation at the time of startup.
Error Decision
Conditions
When over-current is detected at the time of waveform output before operating the
compressor
When the current sensor error during synchronized operation
When overvoltage occurs in IPM
Supposed
Causes
Defective outdoor unit PCB (A1P)
•
IPM failure
•
Current sensor failure
•
Defective drive circuit