Daikin Super Multi NX FLXS25BAVMB User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Floor / Ceiling Suspended
Dual Type
2.5/3.5/5.0/6.0 kW Class
Si051261EB

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FLXS25BAVMB
FLXS35BAVMB
FLXS35BAVMB9
FLXS50BAVMB
FLXS25BVMA
FLXS35GVMA
FLXS50GVMA
FLXS60GVMA

Si051261EB
Removal Procedure 1
Table of Contents
1. Air Filters / Front Grille ............................................................................2
2. Front Panel..............................................................................................4
3. Horizontal Blade......................................................................................6
4. Signal Receiver Unit / Swing Motor.........................................................7
5. Discharge Grille.......................................................................................8
6. Drain Pan ................................................................................................9
7. PCBs / Electrical Box ............................................................................10
8. Fan Rotor / Fan Motor...........................................................................12
9. Indoor Heat Exchanger .........................................................................14
Note: The illustrations may be slightly different depending on the model.

Air Filters / Front Grille Si051261EB
2Removal Procedure
1. Air Filters / Front Grille
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the air filters.
1Pull the protrusions on
the both sides of the
front grille and open it.
2Hold the tab at the
center of the air filter
frame and pull the air
filter forward.
Installing air filters can be
done easily by sliding along
the guide.
3Pull the air filter along
the guide and remove
it.
Front grille
(R2978)
(R2981)

Si051261EB Air Filters / Front Grille
Removal Procedure 3
2. Remove the front grille.
1Remove the 2 grille
fixtures (right and left
sides), using a flat
screwdriver.
2To remove the front
grille, unfasten the 3
hooks.
3. Remove the side cover. If it is difficult to remove the
side cover from outside with
fingers, remove the front
panel first, then push the
side cover from inside to
outside.
1Remove the side cover.
Step Procedure Points
(R2982)
Grille fixture
(R17922)
Hook
Front panel
(R2985)
Side cover

Front Panel Si051261EB
4Removal Procedure
2. Front Panel
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Caution For ceiling suspended type, be careful that the front panel may fall when the hooks are
disengaged. To prevent the front panel from falling down, this work should be done by
2 persons.
Step Procedure Points
1Remove the 4 screws
of the front panel.
For the ceiling suspended
type, remove drain hose
before removing the screws.
2Remove the 3 screw
covers at the front of
the front panel.
3Remove the 3 screws.
Front
panel
(R2986)
To open the screw cover
(R17923)

Si051261EB Front Panel
Removal Procedure 5
4Unfasten the 3 hooks of
the front panel.
5Press (A) section
slightly at the center of
the front panel, and
unfasten the hook.
6Remove the front panel.
Step Procedure Points
Hook
(R2989)
(1)
(2)
(A)
(R17689)
(R2991)

Horizontal Blade Si051261EB
6Removal Procedure
3. Horizontal Blade
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Open the horizontal
blade.
2Deflect the 3 center
bearings to the left side
slightly, and release the
shafts of the horizontal
blade.
3Bend the horizontal
blade slightly to release
the shafts from the
bearings at the both
ends. (Release the left
side shaft first.)
(R2993)
(1) (2)
(R14198)

Si051261EB Signal Receiver Unit / Swing Motor
Removal Procedure 7
4. Signal Receiver Unit / Swing Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the signal
receiver unit.
1Unfasten the 2 hooks
(right and left sides) to
remove the signal
receiver unit.
2Remove the wire
harness of the signal
receiver unit from the
groove.
Rearrange the wire harness
in position as it was when
reassembling signal receiver
unit.
2. Remove the swing motor.
1Remove the 2 screws
and remove the swing
motor.
Signal receiver unit (R2995)
(R2996)
(R2997)
Swing motor
(R2998)

Discharge Grille Si051261EB
8Removal Procedure
5. Discharge Grille
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the 2 screws
on both sides.
2Unfasten the 2 hooks
(right and left sides)
and remove the
discharge grille by
pulling it forward.
Discharge grille
(R2999)
(R3000)
(R3001)

Si051261EB Drain Pan
Removal Procedure 9
6. Drain Pan
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Caution Be careful not to wet the floor with drain water.
Step Procedure Points
1Disconnect the drain
hose.
2Remove the 3 screws
securing the suction
side of the drain pan.
3Unfasten the 2 hooks
located at both sides.
4Slide the drain pan
toward the suction side
and remove it.
Drain hose
(R3002)
Drain pan
(R3003)
(R3004)
(R3005)

PCBs / Electrical Box Si051261EB
10 Removal Procedure
7. PCBs / Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the PCBs.
Clamp the harnesses and
wires with clips as they were
when reassembling.
Negligence of above
procedure may result in
catching wire with the front
panel and may cause
malfunction.
1Disconnect the earth /
ground wire and pull out
the indoor heat
exchanger thermistor.
2Cut the clamp and
disconnect the 2 relay
harnesses at the rear
side of the fan motor.
3Remove the electrical
box cover.
(Unfasten the 2 hooks.)
(R19552)
Earth / ground
wire
Indoor heat exchanger
thermistor
Fan motor
(R17690)
Clamp
(R3008)
Electrical box cover
Hook

Si051261EB PCBs / Electrical Box
Removal Procedure 11
4Remove the control
PCB.
5Disconnect the
terminals from the
terminal board.
6Remove the power
supply PCB.
2. Remove the electrical box. Slide the electrical box to the
right side first to unfasten the
hooks.
1Remove the 2 screws.
2Remove the electrical
box by sliding it to
unfasten the 2 hooks
located at the opposite
side of the electrical
box.
Step Procedure Points
Power supply PCB
(R3009)
Control
PCB
(R19553)
Terminal board
Earth / ground: green/yellow
(1): black
(2): white
(3): red
Power supply PCB
(R3013)
Hook

Fan Rotor / Fan Motor Si051261EB
12 Removal Procedure
8. Fan Rotor / Fan Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the 3 fan rotor
covers. (Securing
hooks are located at A
and B-section.)
Opposite side
2Remove the 2 screws
to remove the fan motor
fixtures.
3Remove the screw to
remove the bearing
fixture.
A-section
Fan rotor cover
(R3014)
Fan rotor
B-section
(R3015)
(R3016)
Hooks at A-section
Hooks at
B-section
Bearing fixture
(R3018)
Bearing
Fan motor fixture

Si051261EB Fan Rotor / Fan Motor
Removal Procedure 13
4Release the shaft
supporting section
using a hexagonal
wrench (for M6) to
remove the fan motor.
Step Procedure Points
(R17694)
Fan motor Fan rotor
(R3020)

Indoor Heat Exchanger Si051261EB
14 Removal Procedure
9. Indoor Heat Exchanger
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
In pump-down work, be sure to stop the compressor before disconnecting the
refrigerant pipe. If the refrigerant pipe is disconnected with the compressor operating
and the stop valve open, air may be sucked in and may generate an over-pressure in
refrigeration cycle, thus resulting in pipe rupture or accidental injury.
When removing or reinstalling the indoor heat exchanger, be sure to wear gloves or
wrap the indoor heat exchanger with cloths. (You may be injured by the fins.)
Caution Be sure to conduct pump down operation before disassembling the refrigerant pipe.
If the refrigerant leaks, repair the spot of leaking, then collect all refrigerant from the
unit. After conducting vacuum drying, recharge proper amount of refrigerant.
From the viewpoint of global environmental protection, make sure to use a vacuum
pump for air purging.
To prevent the indoor heat exchanger from falling down, the work should be done by 2
persons.
Step Procedure Points
1Disconnect the auxiliary
flexible tube.
2Remove the 2 screws
of the piping fixture.
3Remove the 2 screws
at the left side of the
indoor heat exchanger.
Auxiliary flexible tube
(R3021)
(R18218)
Piping fixture
Indoor
heat
exchanger

Si051261EB Indoor Heat Exchanger
Removal Procedure 15
4Unfasten the hook
located on the right side
behind the indoor heat
exchanger.
5Slide the indoor heat
exchanger to the right
to release the hook.
6Remove the indoor heat
exchanger.
Step Procedure Points
Move to right
Remove
(R14207)
(R3024)

Revision History
Month / Year Version Revised contents
09 / 2012 Si051261 First edition
11 / 2012 Si051261_A Model addition: FLXS25/35/50BAVMB
12 / 2013 Si051261EB Model addition: FLXS35BAVMB9

Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com
All rights reserved
c
Warning
zDaikin products are manufactured for export to numerous countries throughout the world. Prior to
purchase, please confirm with your local authorised importer, distributor and/or retailer whether this
product conforms to the applicable standards, and is suitable for use, in the region where the product
will be used. This statement does not purport to exclude, restrict or modify the application of any local
legislation.
zAsk a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
zUse only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
zRead the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
Cautions on product corrosion
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Dealer
z
Specifications, designs and other content appearing in this brochure are current as of December 2013 but subject to change without notice.
Si051261EB
12/2013 AK.B