Basic Troubleshooting - Hitachi RASC UTOPIA RCI-2.0FSN1E Installations- Und Betriebshandbuch

AUTOMATIC CONTROL
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).
If your system is a Heat Pump Model also are equipped by the
following functions:

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
•
(Only for Heat Pump Models)
During defrosting operation, ice on the outdoor heat exchanger
is melted, resulting in making steam.
Dew on Air Panel (RCI and RCD Units)
•
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 (Only for RPI Units) 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.
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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.
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.
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.
PMGB0126A rev.2 - 11/2006
8