Panasonic CS-C12DKU Service Manual

Contents

Panasonic CS-C12DKU Service Manual Manual pdf 19 page image

8.4.5. Anti-Freezing Control• If the temperature of the indoor heat exchanger falls below 35.6°F continuously for 4 minutes or more, the compressor turns off.The fan speed setting remains the same.• This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid formreturning to the compressor.• Compressor will restart again when the indoor heat exchanger temperature rises to 50°F (Recovery).• Restart control (Time Delay Safety Control) will be applied in this Control if the recovery time is too short.8.4.6. Compressor Reverse Rotation Protection Control• If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air andindoor heat exchanger is 4.5°F or less for continuous 2 minutes, compressor will stop and restart automatically.• Time Delay Safety Control is activated before the compressor restart.s T = Intake air temperature - Indoor heat exchanger temperature• This is to prevent compressor from rotate reversely when there is an instantaneous power failure.8.4.7. Anti-Dew Formation Control• Purpose is to prevent dew formation on indoor unit discharge area.• When room temperature is constant (±1.8°F) the following condition occur for 30 minutes continuously, anti-dew formation willactivate:- Indoor intake temperature is more than 75.2°F and less than 86°F.- Remote Control setting temperature is less than 77°F- Compressor is on.- Cooling Operation Mode.- Indoor fan motor operate at Low fan speed or QLo.19CS-C9DKU CU-C9DKU / CS-C12DKU CU-C12DKU