Daikin FCQ71KVLT User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Pair Type
3/4/5/6 HP Class
Si281312E

Service Manual
Removal Procedure
Outdoor Unit
Applicable Models
zHeat Pump
FCQ71KVLT
FCQ100KVLT
FCQ125KVLT
FCQ140KVLT

Si281312E
Removal Procedure 1
Table of Contents
1. Procedure to Remove Air Filter and Suction Grille .................................2
2. Procedure to Remove Decoration Panel.................................................3
3. Procedure to Remove Horizontal Blade..................................................4
4. Procedure to Remove Swing Motor ........................................................6
5. Procedure to Remove Switch Box ..........................................................7
6. Procedure to Remove PCB.....................................................................8
7. Procedure to Remove Bell Mouth and Drain Pan ...................................9
8. Procedure to Remove Fan Motor..........................................................10
9. Procedure to Remove Drain Pump, Float Switch..................................11
10.Procedure to Remove Humidity Thermistor and
Air Temperature Thermistor ..................................................................12
11.Procedure to Remove Heat Exchanger Temperature Thermistor.........13

Procedure to Remove Air Filter and Suction Grille Si281312E
2Removal Procedure
1. Procedure to Remove Air Filter and Suction 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. Removing the air filter Clean stains off the air filter
with a vacuum cleaner or
wash them off with water.
(Do not use hot water of
50°C or more temperature
for this purpose.)
After cleaning the air filter,
press the
button on the remote
controller.
(The message “Clean Filter”
will disappear from the
remote controller display.)
1Press the 2 buttons
simultaneously and pull
the suction grille down
slowly.
2Pull down the bottom
part of the air filter
once, and then
disengage the hole (2
places) for latch from
the protrusion
respectively.
3Hold up the air filter,
and then disengage the
hole (2 places) for latch
from the protrusion
located at the top end
respectively.
2. Removing the suction
grille
1Disengage the strings
(2 places) located at the
top of the suction grille
from the panel.
2Open the suction grille
to an angle of 45
degrees, and then hold
it up to unlatch the
latches located in 3
places.
Clean stains off the suction
grill using a soft brush with
water or mild detergent.
(Do not use hot water of
50°C or more temperature
for this purpose.)
Protrusion
Top of air filter
String
Protrusion
Bottom of
air filter
Bracket
String
Latches located in 3 places
Panel latches
Suction grille
Filter Sign Reset

Si281312E Procedure to Remove Decoration Panel
Removal Procedure 3
2. Procedure to Remove Decoration Panel
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
Removing the suction
grille according to
procedure for removing
the suction grille.
Relay connector
Corner cover string
Screw fixing the decoration
panel
According to the
procedure for the removal
of PCB, remove the lid
from the switch box and
disconnect the relay
connector for the swing
motor.
1. Removing the decoration
panel
1Pull down the corner
covers on the inner side
(i.e., the suction grille
side) to remove them.
2Remove the corner
cover strings.
3Unfasten the 4 screws
that fix the decoration
panel to the extent that
the panel is loosely
fixed.
4Unlatch the 4 outer
latches (A).
(At this time, make sure
the 2 inner latches (B)
are latched.)
5While holding the
decoration panel with
both hands, unlatch the
2 inner latches (B), and
then remove the
decoration panel.
Corner cover
Corner cover
Mounting screws
Mounting
screws
Hook
Outer latch (A)
(located in 4 places)
Hook
Inner latch (B)
(located in 2 places)
Relay connector
String Corner cover
Latch
Mounting screws
Hook

Procedure to Remove Horizontal Blade Si281312E
4Removal Procedure
3. Procedure to Remove 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
Removing the decoration
panel according to
procedure for removing
the decoration panel.
1. Remove the inner frame
from the decoration panel
1Unscrew the 4 screws
from the back of the
decoration panel.
2Remove the 4 seal
parts (A) from the back
of the decoration panel.
3Unscrew the 4 screws
from the front of the
decoration panel.
4Pull out the inner frame
straight from the
decoration panel.
2. Remove parts related to
heat insulation
1Remove heat insulation
from the 4 inner frames.
2Remove heat insulation
from the 4 corners.
3Remove a total of 8
bearing mounting
plates by unscrewing
1
screw, respectively.
Screw on the back side
(located in 4 places)
Seal part (A)
(located in 4 places)
Inner frame of
decoration panel Screw on the front side
(located in 4 places)
Heat insulation of corner
(located in 4 places)
Bearing mounting plates
(located in 8 places)
Heat insulation of inner frame
(located in 4 places)

Si281312E Procedure to Remove Horizontal Blade
Removal Procedure 5
3. Removing the horizontal
blade
1Remove the horizontal
blade assembly.
2To remove the
horizontal blade, put a
screwdriver in the
connection and apply
the “principle of
leverage”.
Step Procedure Points
Horizontal blade
assembly

Procedure to Remove Swing Motor Si281312E
6Removal Procedure
4. Procedure to Remove 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
According to the
procedure for the removal
of decoration panel,
remove the decoration
panel.
1Take the anti-sweat
part from the motor
casing.
2Unscrew the 2 screws
that fix the motor
casing, and then
remove the motor
casing.
3Disconnect the relay
harness connector from
the swing motor.
4Unscrew the 2 screws
that fix the swing motor,
and then remove the
swing motor.
Anti-sweat part
Screws fixing the motor
casing
Swing motor casing
Swing motor
Screws fixing the switch motor
Relay harness
connector
Swing motor

Si281312E Procedure to Remove Switch Box
Removal Procedure 7
5. Procedure to Remove Switch Box
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
According to the
procedure for the removal
of decoration panel,
remove the decoration
panel.
1Unfasten the 2 screws
that fix the lid of the
switch box, and then
slide to remove the lid.
Disconnect every connector
while holding down the tab
beside the connector.
2Disconnect connectors
shown below from the
inside of the switch box.
·Flow switch connector
(X15A, white)
·Heat exchanger
thermistor connector
(X18A, red)
·Fan motor connector
(X20A, white)
·Drain pump connector
(X25A, white)
3Unscrew the 2 screws
that fix the switch box,
and then remove the
switch box.
Fixing screws
Switch box lid
X15AX20AX25A X18A
Fixing screws
Switch box

Procedure to Remove PCB Si281312E
8Removal Procedure
6. Procedure to Remove PCB
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
According to the
procedure for the removal
of decoration panel,
remove the decoration
panel.
1Unfasten the 2 screws
that fix the lid of the
switch box, and then
slide to remove the lid.
2Disconnect connectors
and others from the
PCB.
3Unscrew the 1 screw
that fixes the ground
cable (green).
4Press the 3 tabs to
remove the PCB.
Fixing screws
Switch box lid
Heat exchanger
thermistor
(X18A : Red)
Screw that fixes
the ground cable
Power supply
terminal block
(X27A : Black)
Float switch
(X15A : White)
Humidity thermistor
(X16A : White)
Swing motor
(X36A : Red)
Drain pump
(X25A : White)
Fan motor
(X20A : White)
Wired remote controller
(X30A : White)
A
A
Ta b
Ta b
PCB
PCB
A-A View