AUTOMATIC CONTROLS
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6. AUTOMATIC CONTROLS
The system is equipped with the following functions.
THREE MINUTE GUARD
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.
FROST PREVENTION DURING COOLING
OPERATION
When the system is operated in a low temperature
room, the cooling operation may be changed to fan
operation for a while to avoid frost formation on the
indoor heat exchanger.
AUTOMATIC RESTART AFTER POWER
FAILURE
If the power supply is interrupted for short periods of
time (up to 2 seconds) the Remote Control switch will
retain the settings and the unit will restart when the
power is restored.
If Automatic Restart is required after periods of lost
power supply in excess of 2 seconds please contact
your distributor (optional function).
SLOW AIR CONTROL DURING HEATING
OPERATION
When the compressor is stopped while the thermostat
is OFF, or the system is performing the automatic
defrosting operation, the fan speed is set at the slow
position.
AUTOMATIC DEFROSTING CYCLE
When the heating operation is stopped by pressing
RUN/STOP switch, frosting on the outdoor unit is
checked and the defrosting operation may be
performed for the maximum of 10 minutes.
PREVENTION OF OVERLOAD OPERATION
When the outdoor temperature is too high during
heating operation, heating operation is stopped due to
activation of the outdoor thermistor until the
temperature becomes low.
HOT START DURING HEATING OPERATION
To prevent cold air discharge, the fan speed is
controlled from the slow position to the set position
according to the discharge air temperature. At this time
the lover is fixes horizontally.
7. BASIC TROUBLESHOOTING
CAUTION:
When water leakage from the indoor unit occurs, stop
the operation and contact your contractor
When you smell or white smoke occurs from the unit,
stop the system and contact your contractor.
THIS IS NOT ABNORMAL
Sound from deforming Part
During system starting or stopping, and abrading sound
might be heard. However, this is due to thermal
deformation of plastic parts. It is not abnormal.
Refrigerant Flow Sound
While the system is being started or stopping, sound
from the refrigerant flow may be heard.
Smells from Indoor Unit
Smell adheres on indoor unit after a long period of time.
Clean the air filter and panels or make a good
ventilation.
Steam from Outdoor Heat Exchanger
During defrosting operation, ice on the outdoor heat
exchanger is melted, resulting in making steam.
Dew on Air Panel
When the cooling operation continues for a long period
of time under high humidity conditions (higher than 27°C
DB/80% R.H.), dew can form on the air panel.
Dew on Cabinet
When the cooling operation continues for a long period
of timer (higher than 27°C DB/80% R.H.), dew can form
on the cabinet.
Sound for the indoor unit heat exchanger
During the cooling opertaion, a sound may be heard
from the indoor unit heat exchanger due to water
freezing or melting.
NO OPERATION
Check whether the SET TEMPERATURE is set at the
correct temperature.
NOT COOLING WELL OR HEATING WELL
Check for obstruction of air flow of the outside or inside
units.
Check if too much heat source exists in the room.
Check if the air filter is clogged with dust.
Check to see if the doors or windows are opened or not.
Check if the temperature condition is not within the
operating range.
ABNORMAL SWING LOUVER’S POSISTION
Check if the four louver’s position at the air outlet are in
same position.
IF TROUBLE STILL REMAINS...
If the trouble still remains even after checking the above
items, contact your service contractor and inform the
following data:
- Unit Model Name
- Content of Trouble
- Alarm Code no. on Liquid Crystal Display
NOTE:
Except for a long period of shutdown, keep the main
switch ON, since the oil heater is energised when the
compressor is stopped.
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