TroubleshootingSamsung Electronics 934-5-13 Outdoor unit power supply errorNoNoNoYes1. Checklist:1) Are the input power voltage and power connection correct?2) Is there any Fuse Short of the indoor or outdoor unit?3) Is any LED lit on both MAIN PCB and INVERTER PCB?4) Are Reactor wires of the outdoor unit connected correctly?2. Troubleshooting procedureAre wire and socket connected correctly?Power line N and T wireIs voltage on N-T of terminalblock over 300V? Check and correct the power cable wiringAre wire and socket connected correctly?CN39(MAIN PCB),CN31(INVERTER PCB)Is the FUSE on INVERTER PCB blown?Check and correct the wire orsocket connectionCheck Fuses listed blow3 FUSES in EMI PCB, 1 FUSE in MAIN PCBNoIs there miss connection of power andcommunication wire betweenindoor and outdoor?Correct the cable wiringbetween indoor and outdoorCheck F1,F2 communication line wiring.CN50(MAIN PCB)Check and correct the wiringExchange the FUSEExchange INVERTER PCBCheck each BLDC FAN motorshort or not, by resistance betweenpin #1 and #3YesNoYesNoYesYesYesMAIN PCB INVERTER PCBALL OFF ALL OFFError 202 display NormalError 203 display ALL OFFCheck LEDs on both MAIN PCBand INVERTER PCB after1 minutesfrom power onExchange FAN motor4-6-13
