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
●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
31
