Si34-603 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1513.17 “E5” Compressor Motor LockRemoteControllerDisplayE5ApplicableModelsRX(Y)MQ4~6PMethod ofMalfunctionDetectionInverter PC board takes the position signal from UVW line connected between the inverter andcompressor, and the malfunction is detected when any abnormality is observed in the phase-current waveform.MalfunctionDecisionConditionsThis malfunction will be output when the inverter compressor motor does not start up even inforced startup mode.SupposedCauses Compressor lock High differential pressure (0.5MPa or more) Incorrect UVW wiring Faulty inverter PC board Stop valve is left in closed.TroubleshootingCheck the installationconditions.Is the stop valve open? NOIs the UVW wiringnormal?NONONONOIs highdifferential pressure starting?(0.5MPa or more)YESYESYESCheck and seewhether compressor isshort-circuited orground.YESYESAre inverteroutput voltages the samefor 3 phases?Does low orhigh pressure varyeven instantaneously whenrestartingcompressor?YESCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Open the stop valve.Connect correctly.Remedy the cause.Replace the compressor.Replace the inverter PCboard (A1P).Replace the compressor.(V2793)NO
