Service manual

22
2. INDOOR UNIT CONTROL
2-1COOL operation
(1) Compressor control
1 3-minute time delay
To prevent overload, the compressor will not start within 3 minutes after stop.
2 The compressor runs when room temperature is higher than set temperature.
The compressor stops when room temperature is equal to or lower than the set temperature.
3 The compressor stops in check mode or during protective functions.
4 Coil frost prevention
To prevent indoor coil frost, the compressor will stop when the indoor coil thermistor (RT2) reads 1: or below after the
compressor has been continuously operated for at least 16 minutes or more. When the indoor coil temperature rises to
10: or above, the compressor will start after a 3-minute time delay.
NOTE : By turning OFF the dipswitch SW1-5 on indoor controller board, the start temperature of coil frost prevention
changes from 1: to -3:.
<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: Set temperature changes 1°C when the or
button is pressed one time.
Cooling 19 to 30°C
Minimum 3 minutes w1
ON
Thermostat
Indoor fan
Auto vane
Drain pump
Booster heater
Compressor
ON
ON
LOW or HIGH
Initally 30 degrees
(Changeable by remote controller setting)
LOW or HIGH
ON
ON
OFF
OFF
discharge
position
30
3 minutes
OFF
OFF
OFF
OFF
Operation starts by
POWER button
ON.
Operation stops by
POWER button
OFF.
Room temperature
becomes equal to
set temperature.
Room temperature
rises above set
temperature.
air flow
position
30
<COOL operation time chart>
w1 Even if the room temperature rise above the set temperature during this period, the compressor will not start until this period has ended.
FILTER
CHECK MODE
TEST RUN
240KA