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Malfunction of Transmission (between Inverter PCB and Main PCB)
Remote
Controller
Display
LC
Applicable
Models
LRMEQ5~20PY1
LRLEQ5~20PY1
Method of
Malfunction
Detection
Check the communication state between the inverter PCB and the control PCB by micro-
computer.
Malfunction
Decision
Conditions
When the correct communication is not conducted in certain period.
Supposed
Causes
Faulty connection between the inverter PCB and the main PCB
Faulty main PCB (transmission part)
Faulty inverter PCB
Faulty noise filter
External factors (e.g. noises)
Faulty INV compressor
Faulty fan motor
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