Microcomputer-controlled automatic defrosting
When using the Heating mode under conditions of low outdoor air
temperature high humidity, frost may form on the outdoor unit, result-
ing in reduced operating performance. In order to prevent this kind of
reduced performance, this unit is equipped with a Microcomputer-con-
trolled automatic defrosting function. If frost forms, the air conditioner
will temporarily stop, and the defrosting circuit will operate brieﬂ y (for
about 4 to 15 minutes).
During Automatic Defrosting operation, the OPERATION indicator
lamp (green) will ﬂ ash.
Oil recovery operation
Periodically, the oil recovery operation is performed in order to return
compressor oil to the outdoor unit.
During oil recovery operation, the OPERATION indicator lamp (green)
will ﬂ ash (for about 10 minutes).
Temperature and humidity range
The temperature and humidity required for operating this product is as
shown in the following table.
Please refer to the speciﬁ cation of outdoor units.
18 to 32 °C DB
About 80% or less
If the air conditioner is operated under higher temperature conditions
than those listed, the built-in protection circuit may operate to prevent
internal circuit damage. Also, during Cooling and Dry modes, if the unit
is used under conditions of lower temperature than those listed above,
the heat-exchanger may freeze, leading to water leakage and other
If the unit is used for long periods under high-humidity conditions,
condensation may form on the surface of the indoor unit, and drip onto
the ﬂ oor or other objects underneath.
Do not use this unit for any purposes other than the Cooling, Heating,
Dehumidifying, and air-circulation of rooms in ordinary dwellings.
CLEANING AND CARE
Before cleaning the unit, be sure to stop the unit and disconnect the
Be sure the Intake Grille is installed securely.
When removing and replacing the air ﬁ lters, be sure not to touch the
heat exchanger, as personal injury may result.
Do not clean the inside of the unit by yourself. To clean the inside,
always consult authorized service personnel.
When cleaning the unit' body, do not use water hotter than 40 °C,
harsh abrasive cleansers, or volatile agents like benzene or thinner.
Do not expose the unit body to liquid insecticides or hair sprays.
Cleaning the Intake Grille
Remove the Intake Grille.
(1) Place your ﬁ ngers at both lower ends of the grille panel, and lift
forward; if the grille seems to catch partway through its movement,
continue lifting upward to remove.
(2) Pull past the intermediate catch and open the Intake Grille wide so
that it become horizontal..
10 to 30 °C DB
Clean with water.
Remove dust with a vacuum cleaner; wipe the unit with warm water, then
dry with a clean, soft cloth.
Replace the Intake Grille.
(1) Pull the knobs all the way.
(2) Hold the grille horizontal and set the left and right mounting shafts into
the bearings at the top of the panel.
(3) Press the place where the arrow on the diagram indicates and close
the Intake Grille.
Cleaning the Air Filter
Open the Intake Grille, and remove the air ﬁ lter.
Lift up the air ﬁ lter's handle, disconnect the two lower tabs, and pull out.
Air ﬁ lter handle
Hooks (two places)
Remove dust with a vacuum cleaner or by washing.
After washing, allow to dry thoroughly in a shaded place.
Replace the Air Filter and close the Intake Grille.
(1) Align the sides of the air ﬁ lter with the panel, and push in fully, making
sure the two lower tabs are returned properly to their holes in the panel.
(2) Close the Intake Grille.
(For purposes of example, the illustration shows the unit without
Intake Grille installed.)
Dust can be cleaned from the air ﬁ lter either with a vacuum cleaner,
or by washing the ﬁ lter in a solution of mild detergent and warm water.
If you wash the ﬁ lter, be sure to allow it to dry thoroughly in a shady
place before reinstalling.
If dirt is allowed to accumulate on the air ﬁ lter, airﬂ ow will be reduced,
lowering operating efﬁ ciency and increasing noise.
During periods of normal use, the Air Filters should be cleaned every
When used for extended periods, the unit may accumulate dirt
inside, reducing its performance. We recommend that the unit be
inspected regularly, in addition to your own cleaning and care. For
more information, consult authorized service personnel.
When shutting down the unit for one month or more, ﬁ rst allow the
fan mode to operate continuously for about one-half day to allow
internal parts to dry thoroughly.
Hooks (two places)