Panasonic CS-ME5RKUA Service Manual

5512.4.19 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LEDflashing)Malfunction Decision Conditions Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit isoperating in heating operation. Phenomena: unit is stopping and re-starting very often in heating mode.Malfunction Caused Indoor heat exchanger thermistor. Clogged air filter or heat exchanger. Over-bent pipe (liquid side).TroubleshootingIs the measured resistance of the indoor pipe temperaturethermistor matches the value specified in its characteristicchart?Check the indoor unit intake air filter.When abnormality indication starts again. For safety reason and to preventcomponent breakdown, always switchoff the power before remove andconnect the component.YESNONONOYESCheck the indoor pipe temperature thermistor:Plug out connector (CN-TH) from the indoor unit PCB.Measure the resistance of the indoor heat exchangertemperature thermistor.Is the air filter dirty?Check the dust accumulation on the indoor unit heat exchanger.Is the indoor unit heat exchanger dirty?Clean the air filter.Check the piping & installation condition.Replace piping / reinstall the unit ifnecessary.Defect in indoor pipe temperaturethermistor.Replace the indoor pipe temperaturethermistor.YES Clean the indoor unit heat exchanger.