Panasonic CS-Z35UD3RAW Service Manual page 95

16.3.3 Overload Protection Control

The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown
below.

If the heat exchanger temperature exceeds 60°C, compressor will stop.
16.3.4 Low Temperature Compressor Oil Return Control

In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor
frequency will be regulated up to 600 seconds.
16.3.5 Cold Draught Prevention Control

When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced.
16.3.6 Deice Operation

When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor
and outdoor fan motor stop and operation LED blinks.
95