Haier H-MRV Series Service Manual
Also see for H-MRV AB092FCBHA: Service manualUser manual
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AU48NFIBIA troubleshooting:ReconnectReset addressnoyes1.Communication failureIs indoor unit addressproperly set? Withoutrepetition?nononoyesyesAre communication terminals ofindoor and outdoor unitssecurely connected?Is shielded wireused forcommunication?Use shielded wire. Shield layershould be grounded at singlepointAre communication wireand power cable setseparately?wiring SeparatelyyesyesyesIs there external signalinterference? Eliminate interferenceIs indoor mainboard poorlywelded?nononoyesReplace indoor PCBAre communication resistance andcapacitor of indoor PCB correct? SeeNOTEReplace indoor PCBCheck outdoor mainboard. Makenecessary replacementNOTE: 1. R49.R50 resistor in AS072-182FCBHA circuit and R40.R41 resistor in AE072-242FCBKAcircuit have a resistance of 100 K instead of 47K AS models and C28~C30 of AE models use 104polyester resistors.Is number of indoor unitsindicated by testing boardcorrect? Changeable?yesyes Communication normalNote: For outdoor units before December 2004, in the event of 3 IPM or high currentfaults, outdoor unit will stop signal transmission to indoor unit. Indoor unit will displaycommunication fault.Normally, testing board will indicate number of indoor units. The number is fixed.Wired controller display: E9; 4 flashes of indoor TIMER light of models with remotecontrol-179- |
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H-MRV AB092FCBHAH-MRV AB142FCBHAH-MRV AB182FCBHAH-MRV AC142FCBHAH-MRV AC182FCBHAH-MRV AE072FCBKAH-MRV AE092FCBKAH-MRV AE122FCBKAH-MRV AE142FCBKAH-MRV AE182FCBKAH-MRV AE242FCBKAH-MRV AF092FCBHAH-MRV AF122FCBHAH-MRV AP182FABHAH-MRV AS072FCBHAH-MRV AS092FCBHAH-MRV AS122FCBHAH-MRV AS142FCBHAH-MRV AS182FCBHAH-MRV AU24FHBHAH-MRV AU482FIBIAH-MRV AU48NFIBIAH-MRV Series
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