Service manual

37
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°C or below after the
compressor has been continuously operated for at least 16 minutes or more. When the indoor coil temperature rises to
10°C or above, the compressor will start after a 3-minute time delay.
NOTE : By cut off the J1-5 (Jumper resistance)on indoor controller board, the start temperature of coil frost prevention
changes from 1°C to -3°C.
<How to operate>
1 Press POWER ON/OFF button.
2
Press the a button to display “
f
”.
3
Press the i TEMP. button to set the desired temperature.
NOTE: Set temperature changes 1°C when the or
button is pressed one time.
Cooling 19°C to 30°C
Minimum 3 minutes w1
ON
Thermostat
Indoor fan
Auto vane
Drain pump
(OPTIONAL)
Compressor
ON
ON
LOW or HIGH
Initially horizontal
(Changeable by remote controller setting)
LOW or HIGH
ON
OFF
OFF
3 minutes
OFF
ON
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.
<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
4