■
Heating
●
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 5
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 compressor
operation.
●
Thermo. ON : When the room temperature is below T – 1°C (T°C is set temperature).
Compressor
➞
ON
●
Thermo. OFF : When the room temperature is equal to or above set temperature T°C.
Compressor
➞
OFF
✻
1: Refer to 10-5 "Cold Draft Prevention".
22
Set temp.
Signal from remote control unit
Outdoor fan
Compressor
ON
ON
OFF
OFF
OFF
OFF
T°C
T–1°C
T–2°C
Room temp.
Thermo.
ON
3 minutes
3 minutes
3 minutes
3 minutes
3 minutes
3 minutes
Thermo.
OFF
Thermo.
ON
Thermo.
OFF
ON
ON
5 minutes
OFF
OFF
ON (Reversing cycle)
OFF
LL
LL
OFF
OFF
Set speed
30 seconds
LL
30 seconds
LL
* 1
OFF
* 1
ON
OFF
ON
OFF
OFF
Indoor fan
Standby
lamp
Indoor heat
exch. coil
temp. 35°C
Solenoid coil
(4-way valve)
Operation
button
5 minutes
* 1 25°C
20°C
More than
5 minutes
ON
Set speed
ON
NOTE
