Panasonic CS-W50BD3P Service Manual page 58

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(*2)
Outdoor unit fan control during heating mode operation
Under conditions 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.)
25.4. Hot starting
1. When heating mode operation starts
1. Start
Hot start control commences heating mode operation starts.
2. Operation
"PREHEAT" appears on the remote control display. (Other displays remain unchanged.)
At the indoor unit, the indoor unit fan stops. In addition, during hot starting, the louvre stays at the horizontal position (angle
0°).
3. Cancelling
After 1 minute has passed since heating mode operation started, or if the compressor has turned on, hot starting is
cancelled when the temperature detected by the indoor unit pipe temperature sensor is 18°C or higher.
After cancellation, the "PREHEAT" display on the remote control disappears and the louvre operation returns to the previous
setting.
(However, for 2 minutes after cancellation, the indoor unit fan operates at LOW speed, and then returns to the previous
setting.)
<When hot start operation is cancelled by temperature>
<When hot start operation is cancelled by time>
58

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