Troubleshooting by Indication on the Remote Controller SiBE34-802182 Troubleshooting3.34 “L1” Outdoor Unit: Malfunction of PC BoardRemoteControllerDisplayL1ApplicableModelsRXYSQ4~6PAMethod ofMalfunctionDetection Detect malfunctions by current value during waveform output before compressor startup. Detect malfunctions by current sensor value during synchronized operation at the time ofstartup.MalfunctionDecisionConditions In case of overcurrent (OCP) during waveform output When the current sensor malfunctions during synchronized operation In case of IGBT malfunctionSupposedCauses Faulty outdoor PC board (A1P)• IPM failure• Current sensor failure• Failure of IGBT or drive circuitTroubleshootingYESNOTurn OFF the powersupply once and then turnit ON again.Doesit return normally? It is believed thatexternal factors (noise,etc.) other than failurecaused the malfunction.Replace the outdoor PCboard (A1P).PC board equipped witha resin case( )CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.
