Basic Troubleshooting - Hitachi SET FREE MINI RAS-3 Manuel D'installation

7

BASIC TROUBLESHOOTING

10
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.
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.
Click sound on Outdoor Unit
When the system main switch is on, click sound may be
heard. This sound comes from electrical expansion
valve reset fuction.
Chatter sound on Outdoor unit.
During system starting, stopping or defrosting operation,
chatter sound might be heard. This is due to pressure
equalising process of piping.
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.
In case of long periode of shut down, compressor
-
insulation resistance may be less than 1M
In such case, firstable disconnect the power cable of
the compressor and power ON the unit. Cranckcase
heater will work and refrigerant temperature will
increase. After getting more than 1M
resistance connect the compressor cable again.
Ω
.
Ω
of insulation