SiENBE04-925_A TroubleshootingService Diagnosis 874.10 Compressor LockRemote ControlDisplayE6Method ofMalfunctionDetectionA compressor lock is detected by checking the compressor running condition through theposition detection circuit.MalfunctionDecisionConditions20/25 class Operation stops due to overcurrent. If the error repeats 16 times, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error35 class A compressor lock is detected by the current waveform generated when applying high-frequency voltage to the motor. If the error repeats 16 times, the system is shut down Reset condition: Continuous run for about 5 minutes without any other errorSupposedCauses Compressor locked Compressor harness disconnectedTroubleshootingTurn off the power. Disconnect theharnesses U, V, and W.(R8399)CautionNOYESYESNONOYESCheck with the inverter checker (∗).Turn off the power and reconnectthe harnesses. Turn on the poweragain and restart the system.(Precaution before turning on the power again)Make sure the power has been off for at least 30 seconds.Correct the power supply orreplace the PM1.(Replace the outdoor unitPCB.)∗ Inverter checkerPart No.: 1225477Replace the compressor.Replace it as required.Replace the compressor.Check the electronicexpansion valve.Normal?Emergency stopwithout compressor running?System shutdown after errors repeatedseveral times?Be sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.
