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COOL operation
Four-way valve/OFF
Initial
COOLING
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
w 8
w 9
Vane initial
setting
Vane
55 deg downward angle
70 deg downward angle
Fan speed
LOW
Downward discharge
1 hour
Vane setting notch
Vane horizontal
airflow
Compressor
thermostat ON
Allowance
cancel
3-minute
time delay
6-minute
time delay
3-minute
compressor operation
Coil frost
protection
Cooling area
10-minute
compressor operation
Allowance cancel
Coil frost
prevention
16-minute
compressor operation
Indoor pipe
temperature is 34˚F
or lower
Compressor ON
1
w 10
w 11
Coil frost
prevention
Compressor OFF
Indoor coil
temperature is 50˚F
or higher
Defrosting
protection detection
temperature 30˚F
or lower
YES
NO
6-minute
time delay
3-minute
time delay
Coil frost
prevention release
Allowance
period
6 minute
time delay
Allowance set
1 min continue
Coil frost protection
FAN speed
LOW
FAN speed
LOW 5 min elapse
Outdoor unit
trouble
COOLING OPERATION
w8 When operation stops or changes to cooling or dry mode, the auto vane turns to a horizontal angle. If operation changes
during auto vane SWING, the auto vane will continue to swing.
w9 When operating TEST RUN, the thermostat will be continuously ON.
w10 After 3 minute compressor operation, if the indoor coil thermistor reads 5°F or below for 3 minutes, the compressor will
stop for 6 minutes.
w11Heating area : Indoor coil temperature is more than 9 degrees above the room temperature.
Cooling area : Indoor coil temperature is more than 9 degrees below the room temperature.
FAN area : Indoor coil temperature is within 9 degrees either way of the room temperature.
OC276-A-1.qxp 03.11.25 9:04 AM Page 21