SiUS30-604 Troubleshooting by Indication on the Remote Controller
Troubleshooting 177
2.16 “E5” Compressor Motor Lock
Remote
Controller
Display
E5
Applicable
Models
RWEYQ60, 72, 84MTJU
Method of
Malfunction
Detection
Pick up the location signal using the inverter PCB from the UVWN line connected between the
inverter and the compressor and detect location signal pattern.
Malfunction
Decision
Conditions
In normal operation, location signal for a triple cycle of frequency applied, while in locked operation,
it is a double cycle, and they are detected.
(Retry twice/60 minutes)
Supposed
Causes
Inverter compressor lock
High differential pressure (72.5psi or more)
Incorrect UVWN wire connection
Faulty inverter PCB
Stop valve left closed
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