Panasonic CS-A7GKD Service Manual page 37

12.5.8. 30 Minutes Time Save Control
• The compressor will start automatically if it has stopped for 30 minutes and the intake air temperature falls between the
compressor OFF temperature (A) and compressor ON temperature (B) during the period.
• This is to maintain the room temperature as set. Despite of this, it is to prevent a wrong judgement of intake air temperature due
to poor installation near the sensor area.
12.5.9. Compressor Overload Protection Control
Outdoor Fan Control
• If the temperature of the indoor heat exchanger rises to 51°C, outdoor fan stops. The outdoor fan restarts when the indoor heat
exchanger temperature falls to 49°C.
Compressor high pressure protection
• If the indoor heat exchanger becomes 65°C or more, the compressor will stop and restart automatically.
(Time Delay Safety Control - 4 minutes waiting).
• This is to reduce the pressure, as to reduce the indoor heat exchanger temp. Nevertheless, is to protect the compressor from
overload of too high temperature.
12.5.10. 4-Way Valve Control
• 4-way valve always on during Heating operation. (except deicing operation)
• When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating position for 5 minutes.
• This is to prevent the refrigerant flow process sound for being occur.
12.5.11. Outdoor Fan Motor Control
• When compressor stops (reaches room temperature), outdoor fan will operate for 30 seconds (forced operation).
• This is to release the heat and to obtain the lowest pressure as fast as possible.
12.5.12. Hot Start Control
• Hot Start Control is to prevent cool air discharge into the room when heating operation start.
• When Heating operation starts, Indoor fan will not start until the indoor heat exchanger reaches 30°C as diagram shown.
• Hot start is completed when indoor heat exchanger rises to 39°C or operation over 4 minutes.
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