Panasonic CS-ME5RKUA Service Manual

5612.4.20 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry)Error Code will not display (no Timer LED blinking) but store in EEPROMMalfunction Decision Conditions Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C).Malfunction Caused Air short circuit at indoor unit. Clogged indoor unit air filter. Dust accumulation on the indoor unit heat exchanger. 2/3 way valve closed. Faulty indoor unit fan motor. Refrigerant shortage (refrigerant leakage). Clogged expansion valve or strainer. Faulty indoor pipe temperature sensor. Faulty indoor unit PCB.TroubleshootingCheck the air passage.When abnormality indication starts again.For safety reason and to preventcomponent breakdown, always switchoff the power before remove andconnect the component.Is there any short circuit? YESYESYESYESYESYESYESNONOCheck the indoor unit air filter.Is the air filter dirty?Is the indoor unit heat exchanger dirty?Check if 2/3 way valve is closed?Check if indoor fan motor operates normally?Check if expansion valve or strainer clogged (ice formed)?Does it conform to the sensor characteristic chart?Check the indoor pipe temperature sensor.Check the dust accumulation on the indoor unit heatexchanger.Check for gas leakage, Is oil oozing out from the 2/3 wayvalve?● Provide sufficient air passage.● Clean the air filter.● Clean the indoor unit heat exchanger.● Open the 2/3 way valve.● Replace the indoor unit PCB.● Replace the indoor pipe temperaturesensor.● Reclaim and recharge with correctamount of refrigerant.● Replace the indoor unit fan motor and/orindoor unit PCB.● Repair the pipe flare or union nuts.● Reclaim and recharge refrigerant.NONONONOYES