Sanyo SAP–KM97AHA Technical & Service Manual page 27

Heating
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.
More than
5 minutes
Set temp. T°C
T–1°C
T–2°C
Compressor
OFF
Outdoor fan
OFF
Indoor fan
OFF
Standby
OFF
lamp
Indoor heat
exch. coil
temp. 35°C
* 1 25°C
20°C
Solenoid coil
OFF
(4-way valve)
Operation
OFF
button
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 pres-
sure, 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
Thermo. OFF : When the room temperature is equal to or above set temperature T°C.
Compressor
NOTE
*1: Refer to "10-5 Cold Draft Prevention".
Signal from remote control unit
3 minutes 3 minutes 3 minutes
Thermo. Thermo.
ON OFF
5 minutes 5 minutes
ON
ON
30 seconds
Set speed
LL
* 1
OFF
ON
ON
OFF
3 minutes 3 minutes
Thermo.
ON
OFF
OFF
LL OFF
* 1
ON
ON (Reversing cycle)
ON
23
3 minutes
Thermo.
OFF
Room temp.
ON OFF
ON OFF
Set speed
LL LL
OFF
ON
30 seconds