Panasonic CS-ME5RKUA Service Manual

3812.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched)Malfunction Decision Conditions During startup, error code appears when different types of indoor and outdoor units are interconnected.Malfunction Caused Wrong models interconnected. Wrong indoor unit or outdoor unit PCBs mounted. Indoor unit or outdoor unit PCBs defective. Indoor-outdoor unit signal transmission error due to wrong wiring. Indoor-outdoor unit signal transmission error due to breaking of wire 3 in the connection wires between the indoorand outdoor units.TroubleshootingCheck the indoor and outdoor unit connection wires.Check indoor and outdoor units model number.Is indoor unit and outdoor unit model numbers matched?Check the spare part numbers of the indoor and outdoor unitPCBs and compare with their Part Lists.Matched compatibility?Is there any wiring error?When abnormality indication starts again.For safety reason and to preventcomponent breakdown, always switchoff the power before remove andconnect the component.Correct the indoor-outdoor unit’s connection wires.Change for the specified indoor or outdoor unitPCB.Replace the indoor and outdoor unit PCBs.Match the compatible model(s).NONONOYESYESYES