Samsung MH026FPEA Training Manual

Also see for MH026FKEA: User manual User manual Installation manual Service manual Service manual

Samsung Electronics104Troubleshooting8-4-3 Detailed Inspection ProcedurePull out the power plugfrom the AC terminal andconfirm the fuse on thePCB assembly.Turn the power on.If lamp blinks trouble isnot related to the items1 through 4 on the right.Set TURBO operatingmode when RMC switchpushed after a delay of3 minutes(A-unit and B-unit)Set operating mode whenRMC switch pushed.1. TURBO modeSet operating modewhen RMC switchpushed.1. [FAN] mode2. Fan speed [Hi]3. Continuously operation1) Is the broken?Voltage check1) AC voltage at both end of transformer Primary?the rating voltage ±10% range2) AC voltage at both end of transformer secondary?14~18Vac3) DC voltage at OUT and GND of IC01(KA7812)? 12VDC4) DC voltage at OUT and GND of IC02? 5VDC5) DC voltage at Q201 Base and GND change?5) squarewaveVoltage check1) Voltage of relay (RY71, 72, 73) coil Voltage atpin #13, 14, 15 of IC07 : 12VDC2) Voltage at RY72 No # and RY71 No #,RY72 No # and RY73 No #, the rating voltage±10% range1) Compressor does not operate.1) Voltage at # % both ends of CN72 :above 180V~2) Indoor unit fan motor does not operate.• Voltage over• Indoor unit fan motor short-circuit.• Irregular power code or power fuse,or poor wiring.• Transformer is faulty.• Power circuit is faulty.• Power circuit is faulty.• Q201 is faulty.• D101~D104 (IN4007)• Relay(RY71) coil is open.• IC6(KID65003A) is faulty.• Relay contactor is faulty or Relay is faulty• Temperature of Heat exchange is lower.• PCB is faulty.• Room sensor or Heat exchangertemperature sensor is faulty• Indoor unit fan motor is faulty.• Poor connection of indoor fan motor andconnector of RPM sensing (CN44)No Procedure Inspection Method Cause12345