Samsung AVMKH020EA4 Service Manual

Also see for AVMBH020EA4: Service manual Owner's instructions Owner's instructions

Contents

Samsung ElectronicsTroubleshooting11-1211-2-8 Communication error between the indoor unit and outdoor unit on trackingOutdoor unit displayIndoor unit displayJudgment methodCauses(Operation) (Timer) (Fan) (Filter) (Removing frost)- When the number of indoor unit of installation switch mismatch with communicatedindoor unit on tracking the outdoor unit- Communication error between the indoor unit and outdoor unit, and the setting switchsetup error for the installation number of indoor unitCompare and check the setting switchsetup value for indoor unit installation numberof outdoor unit PCB with the actualindoor unit installation number.Press the reset key(K3) of the outdoor unit PCBand check the number of indoor unitresponding to the tracking at display part.Remove the communication wire connectingfrom the outdoor unit to the indoor unit, and thenmeasure 2 wires of the outdoor unit with scope.Is there any responseof indoor unit at display parton tracking?Check the communication wire connectingfrom the outdoor unit to the indoor unit.If there is no defect, search the indoor unit thatinterrupts the communication by connecting theindoor unit one by one. And after check a wire,displace the indoor unit PCB.Is the voltagebetween both wires square waveover DC0.7V?Is same the actualindoor unit installation number and thesetting switch setup value for indoorunit installation number?After right setting the setting switch setupvalue for indoor unit installation number ofoutdoor unit, perform the tracking again bypressing the reset key(K3) of PCB.Search for the indoor unit displayed thecommunication error after 2 minutes, and checkthe duplication of PCB address setup.(The communication error is occurreddue to address duplication.)In this case, the communication error isoccurred at the every indoor unit(over 2ea) set wrong address.If there is no defect in address,replace the indoor unit PCB after check thecommunication wire.After check the communication wireand connecter of the outdoor unit PCB,replace the PCB.YesYesYesNoNoNo