Maintenance - Mitsubishi Electric LGH-200RVXT-E1 Operating Instructions Manual

Operation (continued)
n AUTOMATIC VENTILATION setting
The automatic ventilation mode automatically provides the correct
ventilation for the conditions in the room. The following shows the
effect "By-pass" ventilation will have under various conditions.
1. Reduces cooling load
If the air outside is cooler than the air inside the building during
the cooling season (such as early morning or at night), "By-pass"
ventilation will draw in the cooler outside air and reduce the cooling
load on the system.
2. Night purge
"By-pass" ventilation can be used to release hot air from inside
the building that has accumulated in buildings a business district
during the hot summer season.

Maintenance

Remove all dust and dirt on air filters and Lossnay cores at regular
intervals in order to prevent a deterioration in the Lossnay functions.
Guideline: Clean the air filters once a year.
(or when are indicated on the remote controller)
Clean the Lossnay cores once two year.
(Clean the Lossnay cores once a year if possible.)
(Frequency should be increased depending on the extent of dirt.)
Removing the parts
1) Maintenance cover
1. Remove the black screw.
2. Slide the fix piece to out side.
3. Open hinge wire.
Maintenance cover
Fix piece
Hinge wire
2) Air filters and Lossnay cores
1. Remove the front filters from the main unit.
Air filter for RA
Air filter for OA
2. Hold the handle and draw the Lossnay cores out from the main
unit.
Lossnay core
Black screw
Main unit Maintenance stick
Maintenance stick
3. Office equipment room cooling
During cold season, fresh air can be drawn in and used as is to
cool rooms where the temperature has risen due to the use of
office equipment.
CAUTION
l In the case of "By-pass" ventilation, the supply air
temperature slightly rises more than the outside air
temperature because of the heat effect around the ducts or
the unit motors.
l When set to auto ventilation mode while using the pre-heater
function, the outdoor temperature may be detected as higher
and the mode may change to by-pass mode, even in winter.
3. For LGH-200RVXT-E and LGH-250RVXT-E, use the
maintenance stick attached to remove the third Lossnay cores.
Model Number of cores
LGH-150RVXT-E
LGH-200RVXT-E
LGH-250RVXT-E
Lossnay core
Maintenance stick
Cleaning the parts
1) Air filters
Use a vacuum cleaner to remove light dust. To remove stubborn
dirt wash in a mild solution of detergent and lukewarm water.
(under 40˚C)
Vacuum cleaner
Air filter
CAUTION
l Never wash the filters in very hot water and never wash them
by rubbing them.
l Do not dry the filters by exposing them to a flame.
2) Lossnay cores
Use a vacuum cleaner to suck up the dust and dirt on the exposed
surfaces of the Lossnay cores.
Use a soft brush only to clean exposed surface areas.
Do NOT wash in water.
Vacuum cleaner
(with brush attachment)
CAUTION
l Do not use the hard nozzle of the vacuum cleaner. It may
damage the exposed surfaces of the Lossnay cores.
l Under no circumstances should the Lossnay cores be washed
in water.
Number of filters
2 4
3 4
3 4
Lossnay core
Eng-3