Troubleshooting for Outdoor Unit (25/35 class) Si21-205164 Troubleshooting6. Troubleshooting for Outdoor Unit (25/35 class)6.1 OL Activation (Compressor Overload)RemoteControllerDisplayE5Method ofMalfunctionDetectionA compressor overload is detected through compressor OL.MalfunctionDecisionConditions If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following60-minute compressor running time (total time).∗ The operating temperature condition is not specified.SupposedCauses Refrigerant shortage Four way valve malfunctioning Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defectiveTroubleshootingCheck No.4Refer to P.187Check No.5Refer to P.188Check No.6Refer to P.189Check No.11Refer to P.192Insert the thermistor inposition.Replace the discharge pipethermistor.Replace the valve itself orthe coil.Replace the four way valvecoil or the valve itself.Replace the outdoor unitPCB.Refer to the refrigerant linecheck procedure.Replace the outdoor unitPCB. (R2841)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Discharge pipe thermistordisconnected?YESMalfunctioning∗ Discharge pipe thermistorNOFunctioningFunctioningCheck No. 11Check the refrigerant line. Malfunctioning∗ Refrigerant shortage∗ Water mixed∗ Stop valve defectiveCheck No. 6Check the thermistorsMalfunctioningFunctioningCheck No. 4Check the electronic expantionvalve.MalfunctioningFunctioningCheck No. 5Check the four way valve.
