8-2. Cooling

8-2-1. Room Temperature Control

Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the indoor unit.

All information is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit.

Set temp.

T°F

T – 1°F

 

Thermo.

Thermo.

Thermo.

Thermo.

ON

OFF

ON

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

More than

 

 

3 minutes 3 minutes

3 minutes

3 minutes

Compressor

OFF

OFF

 

Outdoor fan

OFF

OFF

Indoor fan

 

Set speed

The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.

As a protective measure, the control circuit switches the compressor OFF after 3 minutes or more of com- pressor operation.

Thermo. ON: When the room temperature is above T°F (T°F is set temperature).

Compressor ON

Thermo. OFF: When the room temperature is equal to or below set temperature T – 1°F. Compressor OFF

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Sanyo KGS1411, CG1411 service manual Cooling, Room Temperature Control

KGS1411, CG1411 specifications

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