AIR CONDITIONER - Heronhill Air Conditioning Ltd

9-5. Troubleshooting Flowcharts9-5-1. Power can not be turned on (No operation at all)(1) Is the supply voltage normal?(2) Is the connection to the AC output OK.?Heat pump ModelShut off the power supplyfrom AC outlet once andturn it on after 5 seconds.FILE NO. SVM-05020OperationCheck ItemsMain causeCountermeasureSymptomNODoes the OPERATIONlamp blink?Does the fuse(F01) blow?NOYESDoes the power turn onby pushing the [ ]button of the remotecontrol?YESYESNODoes the transmissionindicator of remotecontrol flash normallyand transmit certainly?NO Remote control isdefective.(No problem)Parts (R21, R22, SG01,C01, DB01, C02, C63,M01) are defective.YESReplace the remotecontrol.Does the thermalfuse blow?(Under PF. Terminal)YESWrong wiring ofAC cord or connectingcable is defective.Replace thethermal fuse set.Check connection.NONOIs the indication voltage(DC12V or 5V) of mainP.C. board correct?YESDoes the CN14connector the wrongconnecting?NOP.C. board isdefective.Replace the mainP.C. board.Is the voltageacross C63 measuredDC310V ~ 340V?NORefer to the paragraph"Pre-check", or defective circuitbefore power P.C. board block.YESRe-wiring the cable.YESIs the voltageacross C66measured DC12V?NOShut off the powersupply once, anddisconnecting the motorconnector CN11*.Check Resistanceof Pin 1 and 3of Fan-motor= 162Ω .NOReplace Fan-motorand P.C. board.YESYESReplace P.C. board* Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor.− 57−