Mitsubishi Heavy Industries DXK21ZRA-W, User Manual

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At the end of the season

At the beginning of the season

Stop the unit and turn off the power source.

The unit consumes approx. 4W even when the unit is not operating. 
Turning off the power source will help saving energy consumption and cost.

Ensure that the earth wiring is not snapped nor 
disconnected.

Make sure that there are no obstacles blocking 
the airflow around the air intake and outlet 
openings of the indoor and outdoor units.

NOTE

Cooling/heating is affected by an air filter clogged up with dust etc., and the operation noise becomes louder. It 
may also use extra electricity. Please clean the air filter at appropriate intervals.

1

2

Remove batteries from the remote control.

Clean both the indoor and outdoor units.

Clean and reinstall the air filters.

Perform the fan operation for 2 to 3 hours.

Dry the inside of the unit.

3
4
5

Make sure that there is no corrosion or rust on 
the base frame of the outdoor unit.

Insert batteries in the remote control.

Turn on the power source.

3

2

1

4

5

Installing, inspecting and replacing the air-cleaning filter

1. Open the air inlet panel and remove the air filters. 

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2. Remove the filter holders, with the air-cleaning filter installed in the holders, from the 

air-conditioner.

3. Remove the allergen clear filter (Light orange) from filter holder and inspect the 

filter. Use a vacuum cleaner to remove any dust or dirt from the allergen clear filter. 
Replace the allergen clear filter if it cannot be cleaned or if it has been for about 
1 year.
(The allergen clear filter should be replaced after about 1 year of used. However, the 
actual replacement period may vary depending on the conditions in which the filter 
is used.)

Remove the photocatalytic washable deodorizing filter (orange) from the filter  holder 
and inspect the filter. Periodically, remove any dust or dirt from the photocatalytic 
washable deodorizing filter. If the photocatalytic washable deodorizing filter is 
particularly dirty, it may be washed with water. However, the filter is fragile so be sure 
to wash it installed in the filter holder to avoid damaging it. After washing the filter, 
place it in sunlight to dry. Placing the filter in sunlight restores the deodorizing effect.

(Do not dispose of the filter holders. They are reusable. )

4. Install the air-cleaning filter in the filter holders, and then install the filter 
  holders in the air-conditioner.

5. Install the air filters and close the air inlet panel. 

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NOTE

•

  The allergen clear filter and the photocatalytic washable deodorizing filter 

may be installed on either the right or left side of the air-conditioner.

•

  Install the allergen clear filter with the light orange side on front side.

•

  The heat exchanger may injure your fingers. 

•

  Stand firmly on a stepladder or other stable object when removing the air inlet panel and filters.

 Item 

Feature 

Color

For replacing the air-cleaning filter, contact your dealer.

The power of enzyme is used to eliminate allergy-
causing allergens that accumulate on the filter.

Sources of odors on the filter are broken up, resulting in 
a deodorizing effect.

Photocatalytic washable 
deodorizing filter

Orange

Allergen clear filter

Light orange

 CAUTION

Filter holder

Filter

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2016/12/08   15:44:58

2016/12/08   15:44:58