P5417089
31
NOTE
● This air conditioner adopts a hot air circulation system for the heating operation.
If the space is large or the room temperature is excessively low, it takes time to heat the entire room.
If the room is heated enough and discharged air reaches a required temperature, the indication “HOT-
START” is turned OFF after heating the room.
● The indication “HOT-START” may be displayed during, or right after, the defrosting operation.
“HOT-START” is activated during defrost to ensure comfort by reducing the delivery of cold air in the
heating cycle. This is NOT abnormal.
6. Automatic Control
This air conditioner automatically starts the following operations according to the indoor conditions.
3-Minute Guard
▪ Enforced Stoppage:
The compressor remains off for at least 3 minutes once it has
stopped. If the system is started within approximately 3 minutes after
it has stopped, the RUN indicator is activated.
However, the cooling operation or the heating operation remains off
and does not start until after 3 minutes has elapsed.
▪ Enforced Operation:
If all indoor units of the system are Thermo-OFF within approximately
three minutes after the compressor has started, the compressor
operates continuously during those 3 minutes.
However, if all indoor units of the system are stopped by a controller,
compressor has stopped.
Cooling
and
Dry
Frost Prevention
When the indoor unit is operating at a low discharge air temperature,
the cooling operation may be changed to fan operation for a while to
avoid frost formation on the indoor heat exchanger.
Self-Cleaning of
Expansion Valve
The expansion valve self-cleans when the cooling operation has
stopped. The sound of the refrigerant ow may be heard from the
indoor unit during the self-cleaning. This is not abnormal.
Condensate
Prevention
To prevent condensation, the unit operates with its louver at a different
angle from the specied setting for a certain period of time. Even in
this case, the LCD of the wireless controller indicates the specied
louver angle.
Fan Operation
during Power
Saving Control
When the power saving operation is performed, the louver control is
changed to auto mode or xed downward angle.
The LCD on the wireless controller indicates it has not changed.
Heating
Hot Start
To prevent cold air discharge in the room, the fan speed is controlled
from the slow position and the low position and then to the set position
according to the discharge air temperature.
At this time the louver is xed horizontally and “HOT-START” is
displayed on the LCD of the wired controller.
Defrost Operation
The indoor unit fan operation is stopped to prevent cold air discharge
during the defrost operation. At this time, the indication “HOT-START”
is displayed on the LCD of the wired controller and the indoor unit fan
louver angle is set horizontally.
Residual
Heat Removal
When the heating operation is stopped, the indoor fan operation may
remain at the slow speed for a maximum of two minutes to lower the
internal temperature of indoor unit.
Prevention
of Overload
Operation
When the outdoor temperature is high (approx. 70
o
F (21
o
C) or more)
during the heating operation, the operation is stopped by activation of
the outdoor thermistor.
The system is equipped with the following functions.
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