Unical CMCS 12HI, Руководство пользователя

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8. TROUBLESHOOTING
The following table shows a series of seeming malfunctions.
Please check the following items before calling the Authorized Technical Service.
WHAT HAPPENS REASON
After a stop, the air conditioner
does not restarts immediately.
• If "OPERATION" LED on Indoor Unit lights up, it is normal that the
system does not immediately restart. A protective function (3-minutes'
delay) is active for preventing damages to the compressor every time
the operation restarts after a stop.
• If both "OPERATION" and "PRE/DEF" lamps light up, this is not a
malfunction: the compressor does not immediately restarts because of
the intervention of the anti-cold drafts protection.
Noise from the Indoor Unit or from
the Outdoor Unit
• In "COOL" mode or during a thermostatic stop, you may hear the noise
emitted by the operation of the drain pump on Indoor Unit.
• When the system stops after heating operation, the Indoor Unit emits
a creaking sound. This is normal: expansion and contraction of plastic
parts caused by temperature changes make this noise.
• During the start in "COOL" mode or after the stop of "HEAT" operation,
you may hear a gurgling sound or a hissing sound. This is the sound of
refrigerant gas flowing through both Indoor and Outdoor Units.
• When operation mode is switched from "COOL" to "HEAT", you may
hear a hissing sound coming from the refrigerant circuit. This is the noise
of refrigerant caused by flow stop or flow change.
• The tone of operating noise changes. This noise is caused by the
change of frequency.
• The Unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emits it again.
Dust comes out of the Indoor Unit.
The Indoor Unit gives off bad
smells.
• During operation in "HEAT" mode. This is because the Outdoot Unit
is carrying out the automatic defrosting.
Change into the "FAN" mode
during "COOL" mode.
• In order to prevent the frosting of indoor heat exchanger, the system
chenges into "FAN" mode automatically, and restores to the "COOL"
mode after soon.
• When the room temperature value drops to the set temperature value,
compressor stops and the Indoor Unit changes to "FAN" mode. When
temperature rises up, the compressor starts again. It is the same in
"HEAT" mode.
White mist comes out of the
Indoor Unit.
• If during operation in "COOL" mode, humidity is high and the Indoor
Unit's inside is very dirty, temperature distribution inside the room
becomes uneven. It is necessary to clean the Indoor Unit: please call
the Authorized Technical Service.
White mist comes out of the
Outdoor Unit.
• This happens if the Unit is used again after a long time. During this
time, dust has got inside the Unit.
The Outdoor Unit's fan does not
spin.
• This happens during the system's operation. The speed of the fan
is controlled in order to optimize product operation.
Following symptoms are not air conditioner's troubles