Panasonic CS-E18NKUA Service Manual page 39

13.2.6.3 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 140.0°F, compressor will stop.
13.2.6.4 Low Temperature Compressor Oil Return Control
In heating operation, if the indoor temperature falls below 17.6°F when compressor starts, the compressor
frequency will be regulated up to 600 seconds.
13.2.6.5 Cold Draught Prevention Control
When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced or
stop.
Horizontal vane angle may be adjusted in Auto vane setting.
13.2.6.6 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. Horizontal vane is closed during auto vane setting.
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