Panasonic CU-C12DKU - Manual (Page 19)

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 form
returning 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 and
indoor 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 will
activate:
- 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.
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CS-C9DKU CU-C9DKU / CS-C12DKU CU-C12DKU