Comfort-Aire VFH 24 CA - Manual (Page 21)

Heat Controller VFH InverterFlex ® - Ceiling Cassette
19
Conditioned air might be escaping Ensure that any doors or windows
in the area being heated/cooled are
closed.
Unit will not run when turned on
There is a time delay built into the
unit to protect the compressor
Wait a few minutes after turning on
the unit for heating/cooling to
begin.
Improper temperature is set Ensure that the proper mode and
temperature is set on the unit. Try
to adjust the set point temperature
on the thermostat to a better
operating temperature.
A mist is coming out of the outlet
air louvers
This is a normal occurrence when in
cooling mode
A fine mist might be seen coming
from the air outlet louvers when
the unit is being run in cooling
mode and there is high humidity in
the room. As the humidity is
removed from the air, as a result of
the room being cooled, the mist
will go away.
Strange noises are coming from the
unit
A click sound is heard once the unit
begins to operate
This is a normal sound; it is the
opening of the expansion valve.
A hissing sound is heard
continuously
This is a normal sound, usually
when the unit is operating in
cooling mode. It is simply the
sound of the refrigerant flowing
through the system.
A hissing sound is heard when the
unit starts up or just after it has
stopped
This is a normal sound, it is coming
from the condensate drainage
pumping system or it is the sound
of the refrigerant gas flowing in the
system.
A creaking noise is heard from the
indoor unit
This is a normal sound, as the
temperature changes in the room,
the plastic cassette panel or other
components expand and contract,
creating a creaking sound.
Dust is blowing out of the louvers Unit has been sitting for a long
period of time with accumulated
dust and/or the filter/grille/louvers
need to be cleaned.
Properly clean dust from the unit as
described in the Care and Cleaning
section of the manual.
Strange Odor is coming from the
unit
The air quality of the conditioned
space is not good.
Unless the smell is a burning smell,
which is abnormal and means
service is required; all other smells
generated are normally from the
conditioned space. Odors, such as
cigarette smoke, are simply sucked
into the unit from the conditioned