Panasonic MAC0105011C3 Service Manual page 30

Heating Operating Time Diagram
Deicing Control
Deice starts to prevent frosting at outdoor heat exchanger.
- Normal Deicing
Deice operations detection commences after 30 minutes of
Heating operation starts or 60 minutes after previous deice
operation. If the TRS (Thermal Reed Switch) senses the outdoor
piping temperature drops to -3°C (TRS CLOSE) or less for 50 sec.
continuously during compressor is in operation, deice will start.
(There is no detection during Outdoor Fan stops.)
- Overload Deicing
During heating operation, if the outdoor Fan OFF duration (due to
overload control) is accumulated up to 60 minutes and after
compressor starts for 1 minutes, deicing starts.
- Deicing ends when
1. 12 minutes after deicing operation starts;
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