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3
The units that have been left unused for a long period of
time shall be electrified for more than 4 hours before
startup. Do not start the machine immediately after power-
on since this may cause damage to compressor due to
inadequate warm-up of lubricating oil.
Please check if the outdoor unit is covered with ice or
snow. If yes, please remove the ice or snow with warm
water. However, the water temperature shall not exceed
122°F since this may cause damage to plastic parts.
Turn off the main power supply if the machine is expected
to be left unused for more than 3 months, because the oil
heater band consumes power even if the compressor is
not in service. You are recommended to entrust
maintenance personnel to check the unit before startup.
Set the temperature properly. Set the temperature 2°F
lower than expected for heating, and set it 2°F higher than
expected for refrigeration so as to save resources.
Do not open doors and windows frequently during the
operation of air conditioner.
4. Before Operation
5. Automatic Control
This system is designed with the following features.
Note
Please keep the main power supply ON unless the
system is left unused for long. By doing so, the automatic
drainage device starts to function when the level of
accumulated water in machine exceeds the predefined
level.
Three-Minute Stop Protection
To protect the compressor, it is prevented for at least 3
minutes from functioning after its stop. The compressor
automatically gets started in 3 minutes.
Three-Minute Operation Protection
Ensure the compressor runs at least for 3 minutes (if the
compressor runs for less than 3 minutes, it can't stop
unless 3 minutes elapse even if all indoor temperatures
reach the set values). However, the compressor that
runs for less than 3 minutes can be brought out of
service with the remote control.
Oil Return Operation
When an indoor unit is out of service for more than 2
hours during refrigeration, it will run for a few minutes
automatically to prevent the detention of refrigeration oil
in the indoor unit in stopped state.
Freeze Protection during Refrigeration
When the outlet air temperature of indoor unit is
excessively low, refrigeration may be automatically
switched to air supply mode, in which the unit runs for a
period of time to avoid frosting on indoor heat
exchanger.
Cold Air Prevention
To prevent the output of cold air from indoor unit in
heating mode, the fan runs at low speed. The fan speed
is set based on outlet air temperature of indoor unit.
Control of Indoor Fan during Defrosting
The indoor fan is out of service during automatic
defrosting of outdoor unit.
Surplus Heat Output from Indoor Unit
Upon completion of heating, the indoor fan will keep on
running at low speed for approx. 2 minutes to reduce the
temperature of machine body.
Automatic Defrosting
Press "Run/Stop" key to stop heating. The outdoor unit
can automatically detect frost and automatically perform
defrosting for up to 10 minutes.
Overload Protection
Heating stops when outdoor temperature is excessively
high during heating. The heating resumes when the
outdoor temperature drops to a certain level.
Note
If the unit stops due to power breakdown, the system will
not automatically get into service even if power supply is
restored.
Please restart the unit from Step 1. The settings will not get
lost in the case of extremely short power-off time
(within 2 seconds). The system will come into operation
automatically in approx. 3 minutes.
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