Service manual

47
2-4 AUTO operation (Automatic COOL/HEAT change over operation)
(1) Initial mode
1 When AUTO operation starts after unit OFF.
● If the room temperature is higher than the set temperature, operation starts in COOL mode.
● If the room temperature is equal to or lower than the set temperature, operation starts HEAT mode.
2 When AUTO operation starts after COOL or HEAT operation, the previous mode continues.
(2) Mode change
1 HEAT mode changes to cool mode when 15 minutes have passed since the room temperature became 2 degrees
above the set temperature.
2 COOL mode changes to HEAT mode when 15 minutes have passed since the room temperature became 2 degrees
below the set temperature.
(3) Temperature range
AUTO operation is available under the outside air temperatures as follows.
Mode change (HEAT COOL)
When room temperature becomes 2 degrees above the set temperature,the operation mode can not be changed
for 15 minutes.
(degree)
To+2
To:Set temperature (19 28 )
To+1
To
To - 1
To - 2
Compressor
Start
HEAT mode HEAT mode
Mode change
15 minutes
15 minutes
Minimum 3 minutes
COOL mode
(COOL HEAT)
ON
OFF
-9 0 1020304046
-8.5
Cooling range
(Outside air temperature)
Heating range
-5
FILTER
CHECK MODE
TEST RUN
4
<How to operate>
1 Press POWER ON/OFF button.
2 Press the button to display “ ”
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 1°C when the or
button is pressed one time.
Automatic 19 to 28°C
●“AUTOMATIC” works to change by itself the operation
mode either to cooling or heating according to the room
temperature.