Compressor Reverse Rotation Protection Control; Dew Prevention Control; Odor Cut Control - Panasonic CS-YC12MKF Service Manual

12.6 Compressor Reverse Rotation Protection Control

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If the compressor is operating continuously for 5 minutes or longer and the temperature difference between
intake air and indoor heat exchanger is 2.5°C or less for continuous 2 minutes, compressor will stop and restart
automatically.
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Time Delay Safety Control is activated before the compressor restart.
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This is to prevent compressor from rotate reversely when there is an instantaneous power failure.
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If this condition happens continuously for 5 times within 50 minutes, unit will turns off.
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The 5 times counter can be reset when either one of the following condition happen:
- Unit is OFF by remote control or AUTO OFF/ON button.
- Indoor intake temperature - indoor piping temperature >5°C for 1 minute or more.
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The unit could be ON by pressing OFF/ON button at remote control.

12.7 Dew Prevention control

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To prevent dew formation at indoor unit discharge area.
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This control will be activated if:
- Cooling mode.
- Remote Control setting temperature is less than 25°C.
- Fan speed is at CLo.
- Room temperature is constant (±1°C) for 30 minutes.
- Compressor is continuously running.
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Fan speed will be adjusted accordingly in this control.
- Fan speed will be increased slowly.
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Dew prevention stop condition
- Remote control setting temperature is more than 25°C.
- Fan speed is not set to CLo.

12.8 Odor Cut Control

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To reduce the odor released from the unit.
- Start Condition
- AUTO FAN Speed is selected during COOL operation.
- During freeze prevention control and timer preliminary operation, this control is not applicable.
- Control content
- Depends on compressor conditions:
1. Compressor OFF → Compressor ON.
The indoor unit fan stops temporarily and then starts to blow at minimum airflow for 30 seconds.
2. Compressor ON → Compressor OFF.
The indoor unit fan stops for 90 seconds and then blows at minimum airflow for 20 seconds.
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