Daikin Super Multi NX FLKS25BAVMB User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Floor / Ceiling
Suspended Dual Type
2.5/3.5/5.0/6.0 kW Class
Si051060

Service Manual
Removal Procedure
Indoor Unit
zCooling only zHeat Pump
FLKS25BAVMB FLXS25BAVMB
FLKS35BAVMB FLXS35BAVMB
FLKS50BAVMB FLXS50BAVMB
FLXS35GVMA
FLXS50GVMA
FLXS60GVMA

Si051060
Removal Procedure 1
Table of Contents
1. Removal of Air Filters / Front Grille .........................................................2
2. Removal of Front Panel ..........................................................................5
3. Removal of Horizontal Blade...................................................................7
4. Removal of Signal Receiver Unit / Swing Motor .....................................8
5. Removal of Discharge Grille ...................................................................9
6. Removal of Drain Pan ...........................................................................10
7. Removal of Electrical Box / PCBs .........................................................11
8. Removal of Fan Rotor / Fan Motor........................................................14
9. Removal of Indoor Heat Exchanger......................................................16
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filters / Front Grille Si051060
2Removal Procedure
1. Removal of Air Filters / Front Grille
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. External appearance
The illustrations are
given as the ceiling-
suspended type.
Note:
The removal procedure is the
same for the floor-mounted
type.
2. Remove the air filters.
1Pull the protrusions on
the both sides of the
front grille and open it.
(R2976)
(R2977)
TIMER lamp (yellow)
Operation lamp (green)
ON / OFF button
HOME LEAVE
lamp (red)
Front grille
(R2978)
(R2979)

Si051060 Removal of Air Filters / Front Grille
Removal Procedure 3
2Hold the tab at the
center of the air filter
frame and pull the air
filter forward.
3Pull the air filter along
the guide and remove
it.
Installing air filters can be
done easily by sliding along
the guide.
3. Remove the front grille.
1Remove the 2 grille
fixtures (right and left
sides), using a flat
screwdriver.
Step Procedure Points
Air filter
(R2980)
(R2981)
(R2982)
Grille fixture
(R2983)

Removal of Air Filters / Front Grille Si051060
4Removal Procedure
2To remove the front
grille, unfasten the
hooks at 3 locations.
4. Remove the side cover.
1Remove the side cover.
Note:
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.
Step Procedure Points
(R2984)
Front panel
(R2985)
Side cover

Si051060 Removal of Front Panel
Removal Procedure 5
2. Removal of Front Panel
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Remove the 4 screws
of the front panel.
Note:
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
(R14196)
(R2988)

Removal of Front Panel Si051060
6Removal Procedure
4Unfasten the 3 hooks of
the front panel. 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.
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)
(R14197)
(R2991)

Si051060 Removal of Horizontal Blade
Removal Procedure 7
3. Removal of Horizontal Blade
Procedure 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
bearings at the both
ends. (Release the left
side shaft first.)
Horizontal blade
(R2993)
(1) (2)
(R14198)

Removal of Signal Receiver Unit / Swing Motor Si051060
8Removal Procedure
4. Removal of Signal Receiver Unit / Swing Motor
Procedure 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.
Note:
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)

Si051060 Removal of Discharge Grille
Removal Procedure 9
5. Removal of Discharge Grille
Procedure 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.
2Unfasten the 2 hooks
(right and left sides)
and remove the
discharge grille by
pulling it forward.
Discharge grille
(R2999)
(R3000)
(R3001)

Removal of Drain Pan Si051060
10 Removal Procedure
6. Removal of Drain Pan
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Disconnect the drain
hose. Caution
Be careful not to wet the floor
with drain water.
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
(R3004)
(R3005)

Si051060 Removal of Electrical Box / PCBs
Removal Procedure 11
7. Removal of Electrical Box / PCBs
Procedure 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
wire and pull out the
indoor heat exchanger
thermistor.
2Disconnect the 2 relay
harnesses at the rear
side of the fan motor.
3Remove the electrical
box cover.
(Unfasten the 2 hooks.)
Indoor heat exchanger thermistor
Earth wire
(R3006)
Fan motor
(R3007)
(R3008)
Electrical box cover
Hook

Removal of Electrical Box / PCBs Si051060
12 Removal Procedure
4The illustration shows
the control PCB.
5Disconnect the
terminals from the
terminal board.
Step Procedure Points
Power supply PCB
(R3009)
Control
PCB
SW2
S7
S6
S24 S37
S32
S26
S21
(R2958)
(R14206)
Terminal board
earth: green/yellow
(1): black
(2): white
(3): red
Power supply PCB

Si051060 Removal of Electrical Box / PCBs
Removal Procedure 13
6The illustration shows
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.
Remove the electrical
box by sliding it to
unfasten the hooks
located at the opposite
side of the electrical
box.
Step Procedure Points
S36
FU1
V1
(R2959)
(R3013)
Hook

Removal of Fan Rotor / Fan Motor Si051060
14 Removal Procedure
8. Removal of Fan Rotor / Fan Motor
Procedure 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.)
The right illustration
shows the opposite
side.
2Disconnect the 2 relay
harnesses at the rear
side of the fan motor
and unclamp the
harness from the hook.
A-section
Fan rotor cover
(R3014)
Fan rotor
B-section
(R3015)
(R3016)
Hooks at A-section
Hooks at
B-section
Fan motor
(R3017)

Si051060 Removal of Fan Rotor / Fan Motor
Removal Procedure 15
3Remove the 2 screws
to remove the fan motor
fixtures.
4Remove the screw to
remove the bearing
fixture.
5Release the shaft
supporting section
using a hexagonal
wrench (for M6) to
remove the fan motor.
Step Procedure Points
Bearing fixture
(R3018)
Bearing
Fan motor fixture
(R3019)
(R3020)

Removal of Indoor Heat Exchanger Si051060
16 Removal Procedure
9. Removal of Indoor Heat Exchanger
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Be sure to conduct pump
down operation before
disassembling the
refrigerant pipe.
To prevent the indoor heat
exchanger from falling down,
the work should be done by
2 persons.
1Disconnect the auxiliary
flexible tube.
2Remove the 2 screws
of the piping fixture.
Caution
When removing or reinstalling
the indoor heat exchanger, be
sure to wear protective gloves
or wrap the indoor heat
exchanger with cloths. (Fins
can cut fingers.)
3Remove the 2 screws
at the left side of the
indoor heat exchanger.
Auxiliary flexible tube
(R3021)
(R3022)
Piping fixture
Heat
exchanger

Si051060 Removal of Indoor Heat Exchanger
Removal Procedure 17
4Hook is located on the
right side behind the
indoor heat exchanger.
Warning
Do not contaminate any gas
(including air) other than the
specified refrigerant (R-410A)
into refrigerating cycle.
(Contaminating of air or other
gas causes abnormal
temperature rise in
refrigerating cycle, and this
results in pipe breakage or
personal injuries.)
Warning
If gas leaks, repair the spot of
leaking, then collect all
refrigerant from the unit.
After conducting vacuum
drying, charge proper amount
of refrigerant.
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
01 / 2013 Si051060 First edition