Freeze detection
In the heating operation, the duration of the compressor's operating time is counted, and the defrosting operation starts under any of the conditions described below:
A. The computed time is 28 minutes or more, and the temperature status of the detected external heat exchanger is –20 ° C or less for 3 minutes or more.
B. The computed time is 28 minutes or more, and the temperature detected by the external heat exchanger is -8 ° C or less and the temperature is reduced by about 2.5 ° C below the minimum value of the heat exchanger. external heat for 10 to 15 minutes and continues for 3 minutes or more.
C. The computed time is 34 minutes or more and the temperature detected by the external heat exchanger is -5 ° C or less and the temperature reduced by about 3.0 ° C from the minimum value of the external heat exchanger for 10 to 15 minutes of counted time continues for 3 minutes or more.
D. The computed time is 34 minutes or more and the temperature detected by the external heat exchanger is -0 ° C or less and the temperature reduced by about 1.0 ° C from the minimum value of the external heat exchanger for 10 to 15 minutes of counted time continues for 3 minutes or more.
E. If the following three conditions are met, the defrost operation starts (defrost by the Timer) after heating for 48 minutes.
(1) Remote control setting, HEAT (mode), HIGH (Fan), 30 ° C (temp.).
(2) Ambient temperature is between 19 ° C and 24 ° C, and the outside air temperature is 5 ° C or less.
(3) The defrost operation has already been performed once.
