8. FUNCTION
8-1. Room Temperature Control
■Cooling
●Room temperature control is obtained by cycling the compressor ON and OFF under control of the room tem- perature sensor in the remote control unit.
●The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit.
Signal from remote control unit
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| 3 minutes | 3 minutes | 3 minutes | 3 minutes | 3 minutes | 3 minutes | 3 minutes |
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| Thermo. | Thermo. |
| Thermo. | Thermo. | Thermo. | Thermo. | Thermo. |
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| OFF | ON |
| OFF | ON | ON | ON | OFF |
| T + 2 ¡F |
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set temp. | T ¡F |
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| More than |
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| 5 minutes |
| 5 minutes | 3 minutes | Room temp. |
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Compressor | ON | OFF | ON |
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| OFF | ON |
| OFF | |
Outdoor fan | ON | OFF | ON |
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| OFF | ON |
| 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 pres- sure, the control circuit has a
●As a protective measure, the control circuit switches the compressor OFF after 5 minutes or more of compressor operation.
●Thermo. ON : When the room temperature is above T + 2°F (T°C is set temperature).
Compressor ➞ ON
●Thermo. OFF : When the room temperature is equal to or below set temperature T°F. Compressor ➞ OFF
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