26
P5417055
NOTE
● This air conditioner adopts hot air circulaition system for the heating operation.
● Any oversized room with a low ambient air temperature will require an extended amount of time to warm
up. Once the air temperature gets to the required setting temperature, the display “HOT START” is turned
OFF
.
● The indication
“HOT-START” may be displayed during or right after the defrosting operation. It is
activated during the hot start operation to prevent the perception of cold draft. This is NOT abnormal.
6. Automatic Control
This air conditioner automatically starts the following operations according to the conditions.
Three-Minute Guard
Enforced Stoppage:
The compressor remains OFF for at least three minutes once it has
stopped.
If the system is restarted within approximately three 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 three minutes has elapsed.
Enforced Operation:
If all indoor units of a system are Thermo-OFF within approximately
three minutes after the compressor has started, compressor operates
continuously during those three minutes.
However, if all indoor units of a system are stopped by a controller,
compressor is 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 a fan operation for a while to
avoid frost formation on the indoor heat exchanger.
Self-Cleaning of
Expansion Valve
It is for self-cleaning the expansion valve when the operation is stopped
at cooling. The sound of the refrigerant flow may be heard from the
indoor unit during the self-cleaning. However, this is not abnormal.
Heating
Hot Start
To prevent cold air discharge into a heated space, the fan speed is
changed from the SLOW / LOW setting to a set position based on
discharge air temperature.
At this time, the louver is in a fixed horizontal position and “HOT
START” is displayed on the LCD of the wired controller.
Defrosting
Operation
The indoor unit fan operation is stopped to prevent cold air discharge
during the defrosting operation. At this time, the message “HOT-START”
is displayed on the LCD of the wired controller and the indoor unit fan
louver angle is fixed horizontally.
Residual
Heat Removal
When the heating operation is stopped, indoor fan operation may
remain at the slow speed for a maximum of two minutes to lower the
internal temperature of the indoor unit.
Prevention
of Overload
Operation
When the outdoor temperature is high (approximately 70
o
F (21
o
C) or
more) during heating operation, the operation is stopped by activation
of the outdoor thermistor.
The system is equipped with the following functions:
