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Owner’s Manual -  

B-VMH09,12,18,24DU-1 

 

  

 

7

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 flash. 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 filter every two weeks.

Adjust louvers properly and avoid direct airflow.

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 

flash. 

Closing curtains during heating also

helps keep the heat in 

Doors and windows should be kept 

closed

Summary of Contents for Comfort-Aire Century B-VMH09DU-1

Page 1: ...OWNER S MANUAL Ducted Unit Models B VMH09DU 1 B VMH12DU 1 B VMH18DU 1 B VMH24DU 1 517 787 2100 www marsdelivers com...

Page 2: ...Owner s Manual B VMH09 12 18 24DU 1 2 THIS PAGE INTENTIONALLY LEFT BLANK...

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

Page 4: ...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 Ti...

Page 5: ...iance 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...

Page 6: ...fixed wiring according to the national rule If the supply cord is damaged it must be replaced by the manufacturer its service agent or similarly qualified persons in order to avoid a hazard The applia...

Page 7: ...he 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 ba...

Page 8: ...der 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 remote control...

Page 9: ...se 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...

Page 10: ...EC and the LED indicator light will flash 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 t...

Page 11: ...hanges its setting to prevent frost from forming on the unit Once the temperature increases the unit will start operating again The set temperature has been reached at which point the unit turns off t...

Page 12: ...on the indoor or outdoor unit is dirty Clean the affected heat exchanger The air filter is dirty Remove the filter and clean it according to instructions The air inlet or outlet of either unit is bloc...

Page 13: ...n 10 Off 10 Overload protection 1 On F0 11 Outdoor temperature sensor error 2 On F 1 12 Outdoor condenser pipe sensor error 3 On F2 13 Discharge air temperature sensor error 4 On F3 14 Outdoor EEPROM...

Page 14: ...When disposing of this appliance you have the following options Dispose of the appliance at designated municipal electronic waste collection facility When buying a new appliance the retailer will take...

Page 15: ...f of warranty period Without this proof the express warranty begins on the date of shipment from the factory Please visit www marsdelivers com to register your new product REMEDY PROVIDED BY THE LIMIT...

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