Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting by Remote Controller PACD011001C2154 Troubleshooting Urban Multi “MX1, ME1 Series” Using R-222.6 Remote Controller Self-Diagnosis Function (Display of Malfunction Code)The remote controller switches are equipped with a self diagnosis function so that more appropriatemaintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunctioncode and display of malfunctioning unit No. let you know the contents and location of the malfunction.When there is a stop due to malfunction, the contents of the malfunction given below can be diagnosed bya combination of operation lamp, INSPECTION display of the liquid crystal display and display ofmalfunction code. It also lets you know the unit No. during group control.Malfunction Code ListMalfunctioncodeOperationlampInspectiondisplayUnit No. Malfunction contents PageReferedIndoor Unit A0 9 9 9 Error of external protection device 156A1 9 9 9 PC board defect 157A1 8 7 9 PC board defect 157A3 9 9 9 Malfunction of drain level control system (33H) 158A6 9 9 9 Fan motor (M1F) lock, Overload 159A7 8 7 9 Malfunction of swing flap motor (M1S) 160A9 9 9 9 Malfunction of moving part of electronic expansion valve(Y1E)161AF 8 7 9 Drain level above limit 162AH 9 9 9 Malfunction of air filter maintenance —AJ 9 9 9 Malfunction of capacity determination device 163C4 9 9 9 Malfunction of thermistor (R2T) for liquid pipe (looseconnection, disconnection, short circuit, failure)164C5 9 9 9 Malfunction of thermistor (R3T) for gas pipes (looseconnection, disconnection, short circuit, failure)165C9 9 9 9 Malfunction of thermistor (R1T) for air inlet (looseconnection, disconnection, short circuit, failure)166CJ 8 8 8 Malfunction of thermostat sensor in remote controller 167OutdoorUnitE0 9 9 9 Actuation of safety device 168E1 9 9 9 PC board defect 169E1 8 7 9 PC board defect 169E3 9 9 9 Actuation of high pressure switch 170E4 9 9 9 Actuation of low pressure switch 171E9 9 9 9 Malfunction of moving part of electronic expansion valve(Y1E) 172F3 9 9 9 Abnormal discharge pipe temperature 173H3 8 7 9 High pressure switch failure —H4 9 9 9 Actuation of low pressure switch —H9 9 9 9 Malfunction of thermistor (R1T) for outdoor air (looseconnection, disconnection, short circuit, failure)174H9 8 7 9 Malfunction of thermistor (R1T) for outdoor air (looseconnection, disconnection, short circuit, failure)174J1 9 9 9 Malfunction of pressure sensor —J3 9 9 9 Malfunction of discharge pipe thermistor (R3T) (looseconnection, disconnection, short circuit, failure)175J3 8 7 9 Malfunction of discharge pipe thermistor (R3T) (looseconnection, disconnection, short circuit, failure)175J5 9 9 9 Malfunction of thermistor (R4T) for suction pipe (looseconnection, disconnection, short circuit, failure)176