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OC277-28
2. INDOOR UNIT CONTROL
2-1 COOL 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.
The compressor maintains the previous state when the room temperature minus the set temperature is 0 degrees or more,
or lower than 2 degrees.
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 34°F or below after the
compressor has been continuously operated for at least 16 minutes or more. When the indoor coil temperature rises to
50°F or above, the compressor will start in a 3-minute(w2) time delay.
w2 When the indoor coil temperature is 30°F or less, the compressor starts in 6 minutes.
NOTE : By turning OFF the dip switch SW1-3 on indoor controller board, the start temperature of coil frost prevention changes
from 34°F to 36°F.
<How to operate>
1 Press POWER ON/OFF button.
2 Press the MODE button to display COOL.
3 Press the SET TEMP. button to set the desired temperature.
NOTE: Set temperature changes 2°F when the
SET TEMP. button
is pressed one time.
Cooling 65 to 87°F.
Minimum 3 minutes w1
ON
Thermostat
Indoor fan
Auto vane
Booster heater
Compressor
ON
LOW or HIGH LOW or HIGH
ON
ON
OFF
OFF
ON
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.
<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
TIMER OFF TIMER
CHECK SET TEMP.
CLOCK AUTO AUTO
START STOP
FAN
SPEED
SWING
AUTO
RETURN
OC277--1.qxp 01.12.14 13:02 Page 28