Panasonic CS-A18CKPG Service Manual page 45

8.13 Low outdoor ambient temperature
control
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A. Purpose
To protect air conditioner from damage under the low outdoor ambient temperature.
(Low outdoor ambient temperature < -12°C).
B. During low outdoor ambient temperature control activated, other compressor & outdoor fan motor
control is ignored. (Apply to all operation modes.)
C. Basic operation
1. Protection control
Outdoor unit stop operation regardless operation mode setting.