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OC277-26
Heat operation
Initial
HEATING
Vane setting notch
Vane initial setting
Defrosting
Heating area
Defrost release
Defrost
30 min. elaspe
Outdoor unit trouble
Four-way
valve ON
Hot adjust
in process
Compressor ON
Compressor
thermostat ON
Allowance cancel
Indoor piping
-5°F or lower
Outdoor unit
trouble
FAN SPEED
Very low airflow
Compressor OFF
1
3 min.restart
prevention
6 min. restart
prevention
2
A
B
B
A
1
2
1
Hot adjust start
FAN SPEED
very low
Compressor ON
10-minute
compressor
operation
Allowance cancel
Heating
area
FAN STOP
Airflow area
20 min.elaspe
Airflow area
Heating area
Outdoor unit
trouble
Airflow area
Cooling area
Defrost operation
START
Four-way valve
OFF
Indoor piping
131°F or lower
Auxiliary heater
ON
Indoor piping
140°F or higher
Auxiliary heater
OFF
Overheat remote
START
Indoor unit
158°F or higher
Allowance
period
Overload protect
Auxiliary heater
thermostat ON
Auxiliary heater
ON
6-minute restart
prevention
Allowance set
Compressor OFF
Indoor piping
95°F or higher
HOT adjust
6 min. elapse
FAN SPEED
Low
FAN SPEED
Low 2 min.
elapse
FAN SPEED
setting notch
Hot adjust
release
3-minute
Auxiliary heater
OFF
Indoor coil
thermistor is 140°F
or higher
FAN speed
Low notch
Airflow 10% up
FAN setting notch
Auto COOL/HEAT
operation
Initial mode
T1 T0
>
=
COOL mode HEAT mode
COOL mode
T1 < (T0 - 2)
After 15min.
T1<(T0-2)
COOL operation
HEAT operation
11
T1>(T0 + 2)
After 15min.
T1>(T0 + 2)
HEAT operation
Cool mode
set
NO
NO
NO
NO
NO
w 17
w 16
NO
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
w 11
w 11
w 11
w 9
w 15
w 11
w 10
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
HEATING OPERATION
w15 (!) Until Low airflow is set while hot adjustment
(@) While defrosting (FAN STOP)
(#) When thermostat is OFF
In the case of(!), (@) and (#) above, airflow is horizontal regardless the VANE setting.
w16 When AUTO operation is started, COOL or HEAT mode is selected automatically.
w17 T1 : Room temperature.
To : Set temperature
OC277--1.qxp 01.12.14 13:02 Page 26