Panasonic Mini UM S Service Manual

Contents

Panasonic Mini UM S Service Manual Manual pdf 149 page image

Troubleshooting by Indication on the Remote Controller Mini UM S/M140 Troubleshooting4.32 “LC” Outdoor Unit: Malfunction of Transmission betweenInverter and Control PC BoardRemoteControllerDisplayLCApplicableModelsAII outdoor unit modelsMethod ofMalfunctionDetectionCheck the communication state between inverter PC board and control PC board by micro-computer.MalfunctionDecisionConditionsWhen the correct communication is not conducted in certain period.SupposedCauses Malfunction of connection between the inverter PC board and outdoor control PC board Defect of outdoor control PC board (transmission section) Defect of inverter PC board Defect of noise filter External factor (Noise etc.)