Sanyo CH0951 Technical & Service Manual page 52

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
T ¡F
set temp.
T – 2 ¡F
T – 4 ¡F
Compressor
OFF
Outdoor fan
OFF
Indoor fan
OFF
Standby lamp
OFF
Indoor heat exch.
coil temp.
95 ¡F
*1
77 ¡F
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 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 – 2°F (T°C is set temperature).
Compressor
Thermo. OFF : When the room temperature is equal to or above set temperature T°F.
Compressor
NOTE
*1: Refer to "8-6 Cold Draft Prevention".
Signal from remote control unit
3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes
Thermo. Thermo.
ON OFF
5 minutes 5 minutes
ON OFF
ON OFF
30 seconds
Set speed
LL
*1
ON OFF
ON ( Reversing cycle )
ON
OFF
Thermo.
ON
Room temp.
ON
ON
Set speed
LL
ON OFF
ON
48
Thermo.
OFF
OFF
OFF
30 seconds
LL
ON