Sanyo SAP- FR99EH Technical Data & Service Manual page 15

■ 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 5 minutes by the remote control unit to the
controller in the indoor unit.
More than
5 minutes
T ° C
set temp.
T–1° C
T–2 ° C
Compressor
OFF
Outdoor fan
OFF
Indoor fan
OFF
Standby lamp
OFF
Indoor heat exch.
coil temp.
Tc ° C
*1
Solenoid coil
OFF
(4 – way valve)
Operation button
OFF
● 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
NOTE
*1: Refer to "5-7 Cold Draft Prevention".
Signal from remote control unit
5 minutes 5 minutes
Thermo. Thermo.
ON OFF
5 minutes
ON
3 seconds
ON
30 seconds
Set speed
*1
ON OFF
5 minutes 5 minutes 5 minutes
Thermo.
ON
5 minutes
OFF
3 seconds
OFF
LL
ON
ON ( Reversing cycle )
ON
15
5 minutes
Thermo.
OFF
Room temp.
ON OFF
ON OFF
30 seconds
Set speed
LL
OFF ON