Panasonic Cs A7gkd Cs A9gkd Cs A12gkd Series Repair Manual

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12.2. Cooling Operation
• Cooling operation can be set using remote control.
• This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control.
• The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to
30°C.
• During cooling operation, the compressor will stop running and restart as shown in below figure.
12.2.1. Cooling Operation Time Diagram 

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12.3. Soft Dry Operation
• Soft Dry operation can be set using remote control.
• Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.
• This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
• When operation begins, Soft Dry will be switched “ON” for a maximum 10 minutes, then Soft Dry operation will be turned “OFF”
for a minimum 6 minutes. After that, the Soft Dry operation will be “ON” and “OFF” based on...

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12.4. Automatic Operation
• Automatic operation can be set using remote control.
• This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature.
• After judged the temperature, the operation mode is determined by referring to the below standard.
• Then, the unit start to operate at determined operation mode, until it is switched off using remote control, with the setting
temperature as shown in below table.
• Operation mode will be determine again...

34 • Automatic Set Temperature
For each operation, set temperature will automatically set as shown below.
However it can be selected 2°C higher or 2°C lower from standard set temperature by pressing the “Room Temperature Setting
button”.
• The setting temperature for all the operations can be changed one level up or one level down from the standard temperature as
shown in below table by pressing on the temperature up or temperature down button at remote control.
• The operation mode judging temperature...

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12.5.3. 7 Minutes Time Save Control
•The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls between the
compressor ON temperature (A) and compressor OFF temperature (B) during the period.
• This phenomenon is to reduce the built up humidity inside a room.
12.5.4. 60 Seconds Forced Operation
•Once the air conditioner is turned on, the compressor will not stop within 60 seconds in a normal operation although the intake air
temperature has reached the...

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12.5.7. Dew Prevention control
• To prevent dew formation at indoor unit discharge area.
• This control will be activated if:-
- Cooling mode or Quiet mode.
- Remote Control setting temperature is less than 25°C.
- Fan speed is at CLo or QLo.
- Room temperature is constant (±1°C) for 30 minutes.
- Compressor is continuously running.
• Fan speed and angle of horizontal louver (vertical airflow angle) will be adjusted accordingly in this control.
- Fan speed will be increased slowly if the unit is in...

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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...

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12.5.13. Anti Cold Draft Control
• This operation is to prevent the Cold Draft during Heating mode operation.
• The operation will start when compressor OFF (Thermo OFF) during Heating operation.
• For the first 30 sec. from compressor OFF (Thermo OFF), Indoor fan speed will operate accordingly to the Indoor heat
exchanger temperature as shown below:
• After 30 sec. from compressor OFF (thermo OFF), Indoor fan will run at SSLo speed only.
• Anti Cold Draft Control will stop when:
- Intake temperature...

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12.5.14. Deicing Control
Deice starts to prevent frosting at outdoor heat exchanger.
• Normal Deicing
Deice operations detection commences after 30 minutes of Heating operation starts or 60 minutes after previous deice
operation. If the TRS (Thermal Reed Switch) senses the outdoor piping temperature drops to -3°C (TRS CLOSE) or less for 50
sec. continuously during compressor is in operation, deice will start.
(There is no detection during Outdoor Fan stops.)
• Overload Deicing
During heating...

40 Normal Deicing Time Diagram
Overload Deicing Time Diagram