Sanyo C0951, Technical & Service Manual

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8. FUNCTION
8-1. Room Temperature Control
●
Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the 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.
●
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 5 minutes or more of com-
pressor operation.
●
Thermo ON : When the room temperature is above T + 2°F (T°F is set temperature).
Compressor
→
ON
●
Thermo OFF : When the room temperature is equal to or below set temperature T°F.
Compressor
→
OFF
Set temp.
T+2
°
F
Signal from remote control unit
Room temp.
More than
5 minutes
Thermo
OFF
Indoor fan
Outdoor fan
Compressor
Set speed
ON ON ON OFF OFF OFF
ON OFF ON ON OFF OFF
3 minutes 5 minutes
3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes
Thermo
ON Thermo
OFF Thermo
ON Thermo
ON Thermo
ON Thermo
OFF
T
°
F
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