Mitsubishi Heavy Industries KX6 series Service Manual Download

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'10 • KX-SM-148

Indoor Unit

Ceiling surface

Level gauge

(inserted into the unit)

Ceiling opening

dimensions

Keep the distance between 20~24mm.
Exceeding the range of distance
may cause failure etc.

①

Before installation

③

Removing the air return grille

Accessories

Follow installation manual carefully, and install the panel properly.
Check the following items.

Accessories

Accessories holding position

Note: Accessories are laid in the position removing the corner panel.

④

Removing a corner panel

Corner panel

⑤

Orientation of the panel installation

Control box

Refrigerant pipes

Drain pipe

Caution

WARNING

Bolt

Strap

4 pieces

For panel installation

For avoiding the corner panel from falling

②

Checking the indoor unit installation position

for details.)

⑥

Attaching the panel

Stopper

Pull the corner panel toward the direction indicated by
the arrow and remove it. (Same way for all four
corner panels)

Take note that there is an orientation to install the panel.

Attach the panel with the orientation shown on the right.

CAUTION

PIPE SIDE

DRAIN

PANEL INSTALLATION MANUAL

Read this manual together with the indoor unit’s installation manual.

⑦

Electrical wiring

Unit’s hook

Panel’s fixing hanger

Hook

hanger

Screws of

Panel switch

control box cover

Refrigerant pipes

Drain pipe

Connector for louver motor (white) Clamps of unit main body

To Panel switch

CNV (red)

⑥

Attaching the panel

1. Temporary attaching

Lift up the hanger (2 places) on the panel for temporary support.
Hang the panel on the hook on the indoor unit.

2. Fix the panel on the indoor unit

Fasten the panel on the indoor unit with the four bolts supplied with the panel.

Caution

Improperly tightened hanging bolts can cause the
problems listed below, so make sure that you have
tightened them securely.

Air leakage

Air leakage along

the ceiling

Fouling

Dew condensation or dripping

Make sure no gap is left here.

Caution

Pipe Side

Drain

Horizontal 0°

Vertical airflow direction

Dimension L (mm)

Downwards 45°

It can be set between 26~43mm freely.

If it is necessary to fix the louver position manually, follow the procedure mentioned below.
1. Shut off the main power switch.
2.

⑧

Attaching a corner panel

Louver motor

Louver

Louver motor

Connector

Caution

⑩

Attaching the air return grille

To attach the air return grille, follow the procedure described in in the reverse order.
1.

③

Removing the air return grille

Closing direction

Position for hanging hinges

Caution

•

Attaching the

air return

grille from the hinge side.

Be careful in

air return

grille attaching, unstable attaching may cause grille falling.

Repair or replace the distorted, broken stopper at once, or the grille falling may occur.

PIPE SIDE

DRAIN

Stop the air conditioner and press

SET

button and

LOUVER button simultaneously

for three seconds or more.

“

”

“

”

“

”

“

”

Press

button.(selection of indoor unit)

[EXAMPLE]

“

”

⇔

“

”

⇔

“

”

⇔

“

”

Press

SET button. (determination of

indoor unit)

[EXAMPLE]

“

”

“

”

“

”

Press

button. (selection of louver No.)

[EXAMPLE]

“

”

⇔

“

”

⇔

“

”

⇔

“

”

Press

SET button. (Determination of

louver No.)

[EXAMPLE] If No.1 louver is selected,

“

”

current upper limit position

Press

button. (selection of upper limit

position)

“

” (the most horizotal)

⇔

“

”

⇔

“

”

⇔

“

”

⇔

“

”

⇔

“

” (the most downwards)

⇔

“

” (return to the default setting)

2•4•6•8

3•5•7•9

No. 4

No. 2

No. 1

No. 3

ort

Louver No.

It is possible to change the movable range of the louver on the air outlet from the wired remote controller. Once the top and bottom position

is set, the louver will swing within the range between the top and the bottom when swing operation is chosen. It is also possible to apply

different setting to each louver.

NOTICE

•

(downwards)

(horizontal)

the position of the louver

Press

SET button (Fixing of the upper

limit position)

[EXAMPLE]

Press

button (Selection of lower limit

position)

Press

SET button (Fixing of the lower limit

position)

[Example]

(displayed for two seconds)

Press

button.

ATTENTION

Lower

position

Movable

range

Upper

position

When plural remote controllers are connected, louver setting operation cannot be set by slave remote controller.

Caution

Fasten the wiring to the terminal securely and hold the cable securely so as not to apply
unexpected stress on the terminal.
Loose connection or hold will cause abnormal heat generation or fire.

Make sure the power supply is turned off when electric wiring work.
Otherwise, electric shock, malfunction and improper running may occur.

Read this manual together with the air conditioner installation manual carefully.

Check if the opening size for the indoor unit is correct with the level gauge supplied in the indoor unit.

Check if the gap between the ceiling plane and the indoor unit is correct by inserting the level gauge into the air
outlet port of the indoor unit. (See below drawing)

Adjust the installation elevation if necessary.

If there is a height difference beyond the design limit
between the installation level of the indoor unit and the
ceiling plane, the panel may be subject to excessive
stress during installation, it may cause distortion and
damage.

Align the “PIPE SIDE” mark (on the panel) with the
refrigerant pipes on the indoor unit.
Align the “DRAIN” mark (on the panel) with the drain
pipe on the indoor unit.

In case the orientation of the panel is

not correct, it will lead to air leakage

and also it is not possible to connect

the louver motor wiring.

If there is a gap remaining between the ceiling

and the decorative panel even after the

hanging bolts are tightened, adjust the

installation level of the indoor unit again.

It is possible to adjust the installation height of the indoor unit with the panel attached as long

as there is no influence on the drain pipe inclination and/or the indoor unit levelness.

To adjust finely, please turn a nut fastening the indoor unit
using a spanner or similar tool from the opening on the corner.

Make sure there is no stress given on the panel when adjusting the height of the indoor

unit to avoid unexpected distortion. It may cause the distortion of panel or failing to

close the air return grille.

1. To avoid unexpected falling of the corner panel, put the strap onto the corner panel’s pin with turning the strap up.
2. Then hang the strap of a corner panel onto the decorative panel’s pin.
3. First insert the part “a” of a corner panel into the part “A” of the decorative panel, and then engage four hooks.

For FDT type, in case the louver No to be set is uncertain, set any louver
temporarily. The louver will swing once when the setting is completed and it
is possible to confirm the louver No and the position.
After that, choose the correct louver No and set the top and bottom
position.

The louver No. to be set is confirmed and the display shows the upper limit of the movable range.

“position --” is to return to the factory setting. If you need to
change the setting to the default setting, use “position --”.

(displayed for two seconds)

(shows current setting)

⑨

How to set the airflow direction

•

After the setting is completed, the louver which was set moves
from the original position to the lower limit position, and goes
back to the original position again. (This operation is not
performed if the indoor unit and/or indoor unit fan is in operation.)

Upper limit position and lower limit position are fixed, and the set
positions are displayed for two seconds, then setting is completed.

If the upper limit position number and the lower limit position number are set to the same position, the louver is fixed at that

position auto swing does not funtion.

If you press

RESET button during settings, the display will return to previous display. If you press

button during settings, the mode will be ended and return to original display, and the settings that have not been
completed will become invalid.

Unplug the connector of the louver motor which you want to fix the position. Make sure to insulate unplugged
connectors electrically with a vinyl tape.

Adjust the louver position slowly by hand so as to be within the applicable range mentioned below table.

Any automatic control or operation from the remote controller will be disabled on the louver whose
position is fixed in the above way.
Do not set a louver beyond the specified range. Failure to observe this instruction may result in
dripping, dew condensation, the fouling of the ceiling and the malfunctioning of the unit.

Piping side

Drain hose side

•

PJF012D003A

The installation level of the indoor unit can be adjusted finely
from the opening provided on the corner, even after panel is attached.
(Refer to

Select the lower limit position of louver.
“position 1” is the most horizontal, and “position 6 ” is the most
downwards.
“position --” is to return to the factory setting. If you need to
change the setting to the default setting, use “position --”.

The upper limit position is fixed and the setting position is
displayed for two seconds. Then proceed to lower limit position
selection display.

Select the upper limit of louver movable range.
“position1” is the most horizontal, and “position 6” is the most
downward.

(the most horizontal)

(the most horizontal)
(return to the default setting)

Louver adjusting mode ends and returns to the original display.

Hang the hooks of the air return grille in the hole of the panel. (The hooks of the grille can be hanged in three side
of the panel as following.)
After the grille is hanged, close the grille while the stoppers on the grille (2 places) are kept pressed to “OPEN”
direction. When the grille comes to the original position, release the stoppers to hold the grille. Make sure to hear the
sound of “CLICK” in both stoppers.

Hold the stoppers on the air return grille (2 places) toward
OPEN direction, open the air return grille.
Remove the hooks of the air return grille from the decorative
panel while it is in the open position.

1. After removing three screws of control box, detach the cover of control box (the hatched part).
2. Connect the connector for louver motor (white 20P).

•

Hold the wiring by using the clamps of the indoor unit.

•

Hold the connector inside the control box.

3. Connect the connector for panel switch.

•

Hold the wiring by using the clamps of the indoor unit.

•

Connect CNV (red) inside the control box.

Control box

Panel switch

The grill may be