Sanyo 26KHHS72R Service Manual - Page 154
Service procedures, 3. Details of Alarm Messages
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4-3. Details of Alarm Messages (1) [Alarm "P29"] (MDC trouble) Input power detection circuit trouble Compressor does not run. Breakdown Motor current detection circuit trouble No Is power OK? Correct power line. Yes Is current detection No circuit wiring OK? Check and correct wiring. 4. Service procedures Are wiring and connector No connections OK? Check and correct wiring. Yes 1 Is compressor No OK? Ground Yes Replace fault? Yes compressor. Coil 2 resistor Yes short circuit? Coil open Yes circuit? No 3 Is there abnormal refrigerant No accumulation? Replace compressor. Yes 4 Is operation of electronic No Are C1 and TS No Replace C1 and control valve sensors TS sensors. OK? OK? Yes Replace electronic control valve. 5 No Is there overload? Remove the cause. Yes Replace outdoor unit control PCB. 6 IV-8 SM831148
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