Operation Instructions
7
Operation Instructions
◆
Automatic Control
The system is equipped with the following functions.
NOTE
Except for a long period of shutdown, keep the main
power switch ON. The drain discharge mechanism is
operated if the drain level is higher than the setting.
●
Three 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 remains off and
does not start until after 3 minutes has elapsed.
●
Three Minute Guard
(Enforced Operation)
If all indoor units of the system are Thermo-OFF
within approximately 3 minutes after compressor
has started, compressor is operated during 3
minutes continuously.
However, if all indoor units of the system are
stopped by remote control switch, compressor is
●
Frost Prevention During Cooling Operation
When the indoor unit is operated at 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.
●
Slow Air Control During Defrosting Operation
When the outdoor unit is performing the automatic
defrosting operation, the indoor fan is stopped and
the louver is fixed horizontally.
NOTE
If the system is stopped due to a power failure, it will
not automatically start again although power is
restored.
Repeat the start-up procedure from Step 1 to start the
system. In the event of a very brief power failure (2
seconds maximum), the settings are memorized.
Therefore, the system starts automatically after
approximately 3 minutes.
stopped.
●
Oil Return Operation
If an indoor unit is stopped more than 2 hours
continuously, this function is operated during a few
minutes.
It has this function to prevent to accumulate in the
heat exchanger of stoppage indoor unit at cooling
operation.
