Automatic Switching Between Cooling And Heating - Sanyo SAP-K77GHAX Technical & Service Manual

8-3. Automatic Switching between Cooling and Heating

When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and
the room temperature, and automatically switches to COOLING or HEATING mode to maintain the desired
temperature.
This means that if the room temperature is higher than or equal to the set temperature, COOLING operation
begins. If the room temperature is lower than the set temperature, HEATING operation begins.
Example:
Example of operation in the AUTO mode with the set room temperature at 23 C.
Room temperature
Set temp.
NOTE
Room temp.
Room temp. < Set temp.
Zone
A
27
26
B
25
24
C
23
C
22
21
B
20
A
19
Compressor
ON
Operation mode C
If one of the following conditions occurs, the air conditioner changes the
operation mode (from cool to heat or vice versa).
The mode changes if the difference between the room
ZONE A:
temperature and the set temperature is at least 3 C.
The mode changes if the difference between the room
ZONE B:
temperature and the set temperature is at least 1.5 C.
if 1-hour has elapsed after the compressor is stopped.
The mode does not changes if the difference between the
ZONE C:
room temperature and the set temperature is within 1.5 C.
Set temp. COOL
HEAT
More than
1 hour
ON
O F F
o o n i l g Heating
47
Within
1 hour
ON
O F F
C o o n i l g