Seivice diagnosisDomestic air conditioner11.4.5 IPM protectionElectrify the machine again and turn it onwith the remote controller,If malfunctionsare reported before or upon the compressorbeing started up,IPM Module is damaged andneeds replacing.1、The system may have been over or under charged with gas, which can be judged through the pressure of themeasuring system.2、The shaft of compressor is seized and the compressor needs replacing.YESNOThe compressor is started normally, butmalfunctions are reported after it has run for sometime.Malfunction unsolvedMethod ofmalfunctiondetectionMalfunctiondetectionconditionsTroubleshootingIPM protection is detected by checking the compressor running condition and so on■The system leads to IPM protection due to over current■The compressor faulty leads to IPM protection■circuit component of IPM is broken and led to IPM protection■IPM protection dues to the compressor faulty■IPM protection dues to faulty PCB of IPM module■Compressor wiring disconnectedSupposedcauses* CautionBe sure to turn off power switch before connect or disconnect connector, or elseparts damage may be occurred. .LED1 flash 2 timesOutdoor diplay42
