SiME281501E
4.1.3 Draft Avoidance Control 2 (FCQ)
When hot start is canceled or when cold air prevention control is finished, if the fan speed is set to "H," the fan
turns at L speed for a certain amount of time, thus avoiding draft while the flap is moving.
cold air prevention
4.1.4 Airflow Rate Shift Control
Tc: High pressure equivalent saturation temperature (°C)
The airflow rate of an indoor unit is varied to prevent shutdown due to a rise in the high pressure level.
(Airflow rate at heating operation)
ON condition Tc 58.8°C
Reset condition Tc < 50°C
Note that the airflow rate is varied for a setting time when the thermostat is ON.
4.1.5 Freeze-up Prevention Control
The thermostat turns OFF under the following temperature conditions to prevent freezing of the indoor unit
heat exchanger.
The electronic expansion valve is controlled to maintain the indoor unit heat exchanger temperature above
0°C.
The outdoor unit fan speed is reduced to prevent freeze-up prevention control from activating during
cooling operation under low outdoor air temperature. (For details, see the section on cooling operation
under low outdoor air temperature.)
Function and Control
H
L
FAN
OFF or LL
Setting
Flap
Po0
Cancel
HOT start,
Indoor unit heat exchanger temperature
Freeze-up prevention control
Reset after 10 continuous minutes
7˚C
Thermostat OFF after
40 cumulative minutes
–1˚C
Thermostat OFF after 1 continuous minute
from 8 minutes after starting
–5˚C
5 sec.
Cancel of hot start or cold air
prevention control.
Function Details
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