Panasonic CS-A24BB4P Service Manual page 96

CASSETTE TYPE
27.4. Heating mode operation time chart (Heat pump type)
(*2)
Outdoor unit fan control during heating mode operation
When the compressor is on during heating mode operation (except during defrosting and when the liquid bypass valve is on), the
outdoor unit fan is controlled by means of input (CN2) indicating whether the contact of the heating pressure switch on the outdoor
unit circuit board is open or closed.
(At the start of heating mode operation, the fan operates at HI speed.)
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