Comfort-Aire VMH 36 Series - Manual (Page 11)

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Heat Controller, Inc. VMH 30/36 SERIES Owner’s Manual
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OPERATION TIPS
The following events may occur during normal operation.
1. Protection features.
Compressor protection
The unit is programmed to protect the compressor by not letting it re-start for 3 minutes
after being stopped.
Anti-cold air (Cooling and heating models only)
The unit is designed not to blow cold air on HEAT mode, when the indoor heat exchanger is in
one of the following three situations and the set temperature has not been reached.
A) When heating has just starting.
B) Defrosting.
C) Low temperature heating.
Defrosting (Cooling and heating models only)
Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is low
and humidity is high, resulting in lower heating efficiency of the air conditioner.
During this condition the air conditioner will stop heating operation and start defrosting automatically.
Defrost time may vary from 4 to 10 minutes according to the outdoor temperature and
the amount of frost build up on the outdoor unit.
2. A white mist coming out of the indoor unit
A white mist may generate due to a large temperature difference between air inlet and air outlet
on COOL mode in an indoor environment that has a high relative humidity.
A white mist may generate due to moisture generated from defrosting process when the air
conditioner restarts in HEAT mode operation after defrosting.
3. Typical sounds
You may hear a low hissing sound when the compressor is running or has just stopped running.
This sound is the sound of the refrigerant flowing or coming to a stop.
You can also hear a low "squeak" sound when the compressor is running or has just stopped
running. This is caused by heat expansion and cold contraction of the plastic parts in the unit
when the temperature is changing.
A noise may be heard due to louver restoring to its original position when power is first turned on.
4. Dust is blown out from the indoor unit.
This is a normal condition when the air conditioner has not been used for a long time or during first
use of the unit, and an accumulation of dust has formed on the unit’s outlet. Cleaning dust off of the
unit before operation may prevent this.
5. A peculiar smell comes out of the indoor unit.
This is caused by the indoor unit giving off smells permeated from building material, from furniture,
or smoke. However, a burning smell may mean something is wrong with the unit. Power off the unit
and call an authorized servicer if such smell exists.
6. Operating mode changes to fan only mode.
When indoor temperature reaches the temperature set point on air conditioner, the compressor will
stop automatically, and the air conditioner changes to FAN only mode. The compressor will start
again when the indoor temperature rises in above the set point in COOL mode or falls in below the
set point in HEAT mode.
The indoor or outdoor fan will stop running when defrosting.
CARE AND MAINTENANCE
Maintenance
Checks before placing back into operation
If you plan to store the unit for a long time, perform
the following:
(1) Operate the fan for about half a day to dry the
inside of the unit.
(2) Stop the air conditioner and disconnect power.
Remove the batteries from the remote controller.
(3) The outdoor unit requires periodic maintenance
and cleaning. Do not attempt to do this yourself.
Contact an authorized servicer.
Check that the wiring is not broken off or
disconnected.
Check that the air filter is installed.
Check if the air outlet or inlet is blocked after the
air conditioner has not been used for a long time.
Air freshening filter
Air freshening filter
1
2
4. Remove the Air Freshening Filter from its support
frame (on some models).
The removing and installation methods are slightly
different, see the pictures marked and on the left.
Clean the air freshening filter at least once a
month, and replace it every 4-5 months.
Clean it with vacuum cleaner, then dry it in cool
place.
5. Install the air freshening filter back into position.
6. Insert the upper portion of air filter back into the
unit, taking care that the left and right edges are
aligned correctly and place filter into position.
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CARE AND MAINTENANCE