Mars Comfort-Aire Century B-VMH09DU-1 User manual

OWNER’S MANUAL
Ducted Unit
Models
B-VMH09DU-1
B-VMH12DU-1
B-VMH18DU-1
B-VMH24DU-1
517.787.2100 • www.marsdelivers.com

Owner’s Manual - B-VMH09,12,18,24DU-1
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Owner’s Manual - B-VMH09,12,18,24DU-1
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Indoor Unit Parts and Major Functions .......... 6
Manual Operations.................................................... 8
Table of Contents
Owner’s Manual
SAFETY
FIRST
Safety Precautions .................................................... 5
1
2
3

Owner’s Manual - B-VMH09,12,18,24DU-1
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Care and Maintenance ............................. 9
a. Unit Maintenance ....................................... 9
b. How to Clean the Air Filter ....................... 9
c. Repairing Refrigerant Leaks ...................... 10
d.Preparation for Periods of Non-use ........ 10
Troubleshooting................................. 11
a. Common Problems ........................... 11
b.Troubleshooting Tips ......................... 12
Disposal Guidelines.................................................................................... 14
4
5
6
Warranty .................................................................................................................. 15

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Thank you for purchasing this air conditioner. This manual will provide you with information on how
to operate, maintain, and troubleshoot your air conditioner. Following the instructions will ensure the
proper function and extended lifespan of your unit.
Please pay attention to the following signs:
Safety Precautions 1
WARNING
•Ask an authorized dealer to install this air
conditioner. Inappropriate installation may
cause water leakage, electric shock, or re.
•The warranty will be voided if the unit is not
installed by professionals.
•If abnormal situation arises (like burning
smell), turn o the power supply and call
your dealer for instructions to avoid electric
shock, re or injury.
• DO NOT let the indoor unit or the remote
control get wet. It may cause electric shock
or re.
• DO NOT insert ngers, rods or other
objects into the air inlet or outlet. This may
cause injury, since the fan may be rotating
at high speeds.
• DO NOT use a ammable spray such as
hair spray, lacquer or paint near the unit.
This may cause re or combustion.
CAUTION
•DO NOTtouch the air outlet while the swing
ap is in motion. Fingers might get caught
or the unit may break down.
•DO NOT inspect the unit by yourself. Ask an
authorized dealer to perform the inspection.
• To prevent product deterioration, do not use
the air conditioner for preservation purposes
(storage of food, plants, animals, works of
art, etc.).
Failure to observe a warning may result in death. The appliance must be
installed by installers or contractors who are licensed HVAC professionals
and in compliance with all local, state and provincial laws.
.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION
• DO NOT place items that might be aected
by moisture damage under the indoor unit.
Condensation can occur at a relative
humidity of 80%.
• DO NOT
expose heat-producing appliances
to cold air or place them under the indoor
unit. This may cause incomplete combustion
or deformation of the unit due to the heat.
•After long periods of usage, check the
indoor unit to see if anything is damaged. If
the indoor unit is damaged, it may fall and
cause injury.
•If the air conditioner is used together with
other heating devices, thoroughly ventilate
the room to avoid oxygen deciency.
• DO NOT climb onto or place objects on top
of the outdoor unit.
• DO NOT operate the air conditioner when
using fumigant insecticides. The chemicals
may become layered with the unit and
endanger those who are hypersensitive to
chemicals.
• DO NOT let children play with the air
•
The air conditioner can be used by children aged
8 years and older and people with reduced
physical, sensory or mental capabilities, or lack
of experience and knowledge, if they have been
given instruction on how to properly and safely
operate the system.
• DO NOT operate the air conditioner in a wet
room (e.g. bathroom or laundry room). This
can cause electrical shock and cause the
product to deteriorate.
conditioner.
• DO NOT operate the air conditioner with
wet hands. It may cause electric shock.
• DO NOT touch the evaporator coils inside
the indoor unit. The evaporator coils are
sharp and may cause injury.

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Indoor Unit Parts And Major Functions 2
Unit Parts
Fig. 2.1
Operating Conditions
Use the system under the following temperatures for safe and eective operation. If the air
conditioner is used under dierent conditions, it may malfunction or become less ecient.
Air outlet
Air inlet
Air filter(on some models)
Drain hose
Electric control cabinet
Refrigerant connecting pipe
• An all-pole disconnection device which has at
least 3mm separation distance in all pole and
a residual current device (RCD) with the rating
of above 10mA shall be incorporated in the
xed wiring according to the national rule.
• If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualied persons in order
to avoid a hazard.
• The appliance shall be installed in accordance
with national wiring regulations.
• The indoor unit must be installed 8 ft. above
floor.
• This appliance is not intended for use by persons
(including children) with reduced physical,
sensory or mental capabilities, or lack of
experience and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a person
responsible for their safety.
• Children should be supervised to ensure that
they do not play with the appliance.
COOL mode HEAT mode DRY mode
Room Temperature 17°C - 32°C
(62°F - 90°F)
0°C - 30°C
(32°F - 86°F)
17°C - 32°C
(62°F - 90°F)

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Features
Default Setting
When the air conditioner restarts after a power
failure, it will default to the factory settings
(AUTO mode, AUTO fan, 24°C (76°F)). This
may cause inconsistencies on the remote
control and unit panel. Use your remote
control to update the status.
Auto-Restart (some models)
In case of power failure, the system will
immediately stop. When power returns, the
Operation light on the indoor unit will ash. To
restart the unit, press the ON/OFF button on
the remote control. If the system has an auto
restart function, the unit will restart using the
same settings.
Energy Saving Tips
•DO NOT set the unit to excessive temperature levels.
•While cooling, close the curtains to avoid direct sunlight.
•Doors and windows should be kept closed to keep cool or warm air in the room.
•DO NOT place objects near the air inlet and outlet of the unit.
•Set a timer and use the built-in SLEEP/ECONOMY mode if applicable.
•If you don’t plan to use the unit for a long time, remove the batteries from the remote control.
•Clean the air lter every two weeks.
•Adjust louvers properly and avoid direct airow.
Louver Angle Memory Function (Optional)
Some models are designed with a louver angle
memory function. When the unit restarts after a
power failure, the angle of the horizontal louvers
will automatically return to the previous position.
The angle of the horizontal louver should not be
set too small as condensation may form and drip
into the machine. To reset the louver, press the
manual button, which will reset the horizontal
louver settings.
Refrigerant Leak Detection System
(some models)
In the event of a refrigerant leak, the LCD screen
will display “EC” and the LED indicator light will
ash.
Closing curtains during heating also
helps keep the heat in Doors and windows should be kept closed

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Manual Operations 3
This display panel on the indoor unit can be used to operate the unit in case the wired
thermostat malfunctions.
Fig. 3.1
• MANUAL button: This button selects the mode in the following order: AUTO, FORCED COOL, OFF.
•FORCED COOL mode: In FORCED COOL mode, the Operation light flashes. The system will then
turn to AUTO after it has cooled with a high wind speed for 30 minutes. The wired remote control
will be disabled during this operation.
•OFF mode: When the panel is turned OFF, the unit turns off and the remote control is re-enabled.
Infrared receiver
Timer indicator Alarm indicator
PRE-DEF
(pre-heating/defrost)
indicator
Manual button
Operation indicator
LED display
NOTE: The display panel mounts on the unit, not in the controlled space, so has limited
access.

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1. If the unit you purchased is a rear ventilated
one, take o the lter in the directions
indicated by the arrows in the following
diagram.
Fig. 4.1
Safety Precautions
•Contact an authorized service technician for
repair or maintenance. Improper repair and
maintenance may cause water leakage,
electrical shock, or re, and may void your
warranty.
•DO NOT substitute a blown fuse with a
higher or lower amperage rating fuse, as this
may cause circuit damage or an electrical re.
•Make sure the drain hose is set up according
to the instructions. Failure to do so could
cause leakage and result in personal
property damage, re and electric shock.
•Make sure that all wires are connected
properly. Failure to connect wires according
to instructions can result in electrical shock
or re.
Unit Maintenance
BEFORE CLEANING OR
MAINTENANCE
•Always turn o your air conditioning system
and disconnect the power supply before
cleaning or maintenance.
•
DO NOT use chemicals or chemically
treated cloths to clean the unit.
•
DO NOT use benzene, paint thinner,
polishing powder or other solvents to clean
the unit. They can cause the plastic surface
to crack or deform.
•
DO NOT wash the unit under running water.
Doing so creates an electrical hazard.
•
DO NOT use water hotter than 40°C (104°F)
to clean the front panel. This can cause the
panel to become deformed or discolored.
•Clean the unit using a damp, lint-free cloth
and neutral detergent. Dry the unit with a
dry, lint-free cloth.
How To Clean The Air Filter
The lter prevents dust and other particles from
entering the indoor unit. Dust buildup can reduce
the eciency of the air conditioner. For optimum
eciency, clean the air lter every two weeks or
more frequently if you live in a dusty area.
Replace the lter with a new one if it’s heavily
clogged and cannot be cleaned.
WARNING: DO NOT REMOVE OR
CLEAN THE FILTER BY YOURSELF
Removing and cleaning the lter can be
dangerous. Removal and maintenance must be
performed by a certied technician.
NOTE: In households with animals, you will
have to periodically wipe down the grille to
prevent animal hair blocking airow.
Care And Maintenance 4

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5. Rinse the filter with clean water and allow
it to air-dry.
DO NOT let the filter dry in
direct sunlight.
6. Reinstall the filter.
Repairing Refrigerant Leaks
WARNING
•If the refrigerant leaks, turn o the air
conditioner and any combustible heating
devices, ventilate the room and call your
dealer immediately. Refrigerant is both toxic
and ammable.
DO NOT use the air
conditioner until the leak is repaired.
•When the air conditioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentration from
exceeding the safety limit in the event of
refrigerant leakage. Concentrated
refrigerant causes a severe health and safety
threat.
Refrigerant Leak Detection System (some
models)
•In the event of a refrigerant leak, the LCD
screen will display “EC” and the LED
indicator light will ash.
Preparation For Periods Of Non-Use
Maintenance after Extended Non-Use
1. Remove any obstacles blocking the vents of
both the indoor and outdoor units.
2. Clean the air lter and the front grille of the
indoor unit. Reinstall the clean, dry air lter in
its original position.
3. Turn on the main power switch at least 12
hours prior to operating the unit.
Storing the Unit While Not In Use
1. Run the appliance on FAN mode for 12 hours
in a warm room to dry it and prevent mold.
2. Turn off the appliance and unplug it.
3. Clean the air filter according to the
instructions in the previous section. Reinstall
the clean, dry filter before storing.
3. Remove the air lter.
4. Clean the air lter by vacuuming the surface
or washing it in warm water with mild
detergent.
A. If using a vacuum cleaner, the inlet side
should face the vacuum.
Fig. 4.2
B. If using water, the inlet side should face
down and away from the water stream.
Fig. 4.3