Panasonic CS-PZ35TKE Service Manual page 92

15.3.6 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.
15.3.7 Low Pressure Protection Control

During low ambient heating operation (below -15°C), if the pipe temperature drops below -16°C, the max
frequency will be reduced and limited.

If it drops below -20°C and does not arise after 3 minutes, the compressor will stop.

The compressor will start again if the pipe temperature rises above -18°C.
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