Daikin FDXV41NVLT User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Duct Connected Type
4.1/5.0/6.3/7.1 kW Class
Si071562E

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FDXV41NVLT
FDXV50NVLT
FDXV63NVLT
FDXV71NVLT
CDXM50PVLT
CDXM63PVLT
CDXM71PVLT

Si071562E
Removal Procedure 1
Table of Contents
1. Air Filter...................................................................................................2
2. PCB.........................................................................................................4
3. Drain Pan ................................................................................................7
4. Indoor Heat Exchanger ...........................................................................8
5. Thermistor ASSY ..................................................................................12
6. Fan Motor / Fan Rotor...........................................................................13
Note: The illustrations may be slightly different depending on the model.

Air Filter Si071562E
2Removal Procedure
1. Air Filter
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 rear suction
type air filter.
There are cases of rear
suction type and the bottom
suction type filters.
1 Appearance
2 Press the 3 upper
hooks and pull the air
filter forward.
Detail of the upper hook.
3 Pull the air filter upward
to unfasten the 3
bottom hooks and
remove the air filter.
Detail of the bottom hook.
2. Remove the bottom
suction type air filter.
1 Appearance
(R22678)
Hook
Air filter
Rear side
(R22679)
(R22680)
(R22681) (R22682)
Bottom side
(R22683)

Si071562E Air Filter
Removal Procedure 3
2 Press the 3 front hooks
to unfasten them.
3 Pull the air filter forward
to unfasten the 3 back
hooks and remove the
air filter.
Step Procedure Points
Hook
(R22684)
Hook
Air filter
(R22685)

PCB Si071562E
4Removal Procedure
2. PCB
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 electrical box
cover.
1 Remove the 2 screws.
2 Lift up the electrical box
cover to unfasten the 2
hooks and remove it.
When reassembling, make
sure that the 2 hooks are
securely fastened.
2. Remove the PCB. 1: front, Black
2: front, White
3: front, Red
4: front, Earth / ground wire:
green / yellow
1 Pull out the 4 terminals
from the terminal board.
Right side
(R22686)
Hook
Electrical box
cover
(R22687)
Terminal board 1 2 3 4
(R22688)

Si071562E PCB
Removal Procedure 5
2 Disconnect the
connectors [S1] and
[S7].
[S1], [S7]: fan motor
3 Disconnect the
connectors [S26] and
[S32].
[S26]: display PCB
[S32]: indoor heat exchanger
thermistor
4 Cut the 2 clamps.
Step Procedure Points
[S7]
[S1]
(R22689)
[S32] [S26] (R22690)
Clamp
(R22691)

PCB Si071562E
6Removal Procedure
5 Unfasten the 3 bottom
hooks.
6 Pull the lower part of
the PCB forward to
unfasten the 2 upper
hooks.
7 Remove the PCB.
Step Procedure Points
Hook (R22692)
Hook
(R22693)
PCB
(R22694)

Si071562E Drain Pan
Removal Procedure 7
3. Drain Pan
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 bottom plate. The number of screws varies
depending on the model.
Screws with ★are flocking
screws.
1 Remove the 11 screws.
2 Open the bottom plate
and slide it forward to
remove it.
2. Remove the drain pan. If the drain hose is
embedded in the wall,
disconnect the drain hose
beforehand.
Be careful not to wet the
floor with remaining drain.
1 Loosen the drain hose
screw and pull out the
drain hose.
2
3
Grip the drain socket
area with your right
hand.
Support the drain pan
with your both hands to
lower the pan and
remove it.
Place a plastic sheet under
the drain pan to prevent from
wetting the floor with
remaining drain.
There is no hook around
drain pan, be careful not to
drop it.
Bottom side
(R22695)
+
+
++
Bottom plate
(R22696)
Drain hose screw Drain hose (R22697)
Drain pan
Drain pan
socket
(R22698)

Indoor Heat Exchanger Si071562E
8Removal Procedure
4. 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.
Step Procedure Points
1. Remove the pipings.
1 Shift the 2 piping
protection sheets for
gas piping and liquid
piping.
2 Unscrew the flare nuts
for gas piping and liquid
piping.
Carry out the removal works
with 2 wrenches.
When the pipings are
disconnected, protect both
the openings of pipe and unit
from entering of moisture.
Right side Piping protection sheet
(R22699)
Gas pipe Liquid pipe
(R22700)

Si071562E Indoor Heat Exchanger
Removal Procedure 9
2. Remove the indoor heat
exchanger thermistor.
1 Cut the clamp.
2 Pull out the earth /
ground connector.
3 Remove the 4 screws
and remove the indoor
heat exchanger
supporting plate.
To prevent the indoor heat
exchanger from dropping, be
sure to support it while you
remove the screws.
There is no hook around the
indoor heat exchanger
supporting plate, be careful
not to drop it.
Step Procedure Points
Clamp
Bottom side
(R22701)
Earth / ground
connector
(R22702)
Indoor heat
exchanger
supporting plate
(R22703)

Indoor Heat Exchanger Si071562E
10 Removal Procedure
4 Cut the clamp.
5 Pull out the indoor heat
exchanger thermistor.
The position of the indoor
heat exchanger thermistor
varies depending on the
model.
Be careful not to lose the clip
of the thermistor.
3. Remove the indoor heat
exchanger.
1 Remove the 2 screws.
Step Procedure Points
Clamp
(R22704)
Indoor heat exchanger thermistor
(R22705)
Clip
(R3264)
Right side
(R22706)

Si071562E Indoor Heat Exchanger
Removal Procedure 11
2 Slide the refrigerant
pipe supporting plate
downward to unfasten
the hook and remove it.
When reassembling, make
sure that the hook is
securely fastened.
3 Make sure to support
the indoor heat
exchanger to prevent it
from dropping. Then
remove the 2 screws on
the left side.
4 Remove the indoor heat
exchanger.
Step Procedure Points
Hook
Refrigerant pipe supporting plate
(R22707)
Hook
(R22708)
Bottom side Indoor heat exchanger
(R22709)
(R22710)

Thermistor ASSY Si071562E
12 Removal Procedure
5. Thermistor ASSY
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 4 screws
and remove the
chamber cover.
2 Cut the 2 clamps and
release the thermistor
harness from the hook.
3 Pull out the thermistor
ASSY and remove it.
Chamber cover (R22711)
Hook
Thermistor
harness
Clamp
(R22712)
Thermistor ASSY
(R22713)

Si071562E Fan Motor / Fan Rotor
Removal Procedure 13
6. Fan Motor / Fan Rotor
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 chamber
cover.
You can remove the fan
rotor and fan motor without
removing the drain pan.
1 Remove the 4 screws.
2 Remove the chamber
cover.
There is no hook around
chamber cover, be careful
not to drop it.
2. Remove the fan housings. The number of the fan rotor
varies depending on the
model.
1 Press the 2 hooks at
the fan housing lower
part to unfasten them.
2
3
Open the fan housing
and pull the fan housing
lower part forward to
remove it.
Remove the other fan
housing lower parts in
the same way.
When reassembling, make
sure the hooks of fan
housings are securely
fastened.
Bottom side
(R22714)
Chamber cover (R22715)
Hook
Rear side
(R22716)
Fan housing lower part (R22717)
Hook
(R22718)

Fan Motor / Fan Rotor Si071562E
14 Removal Procedure
3. Remove the fan rotor
assembly.
1 Pull out the clamp (1)
and cut the 2 clamps
(2).
2 Shift the glass tube to
the left and cut the
clamp.
3 Disconnect the fan
motor connector.
4 Cut the 2 clamps.
Step Procedure Points
Clamp (1) Clamp (2)
(R22719)
Glass tube Clamp
(R22720)
Fan motor connector
(R22721)
Clamp
(R22722)

Si071562E Fan Motor / Fan Rotor
Removal Procedure 15
5 Shift the glass tube and
disconnect the fan
motor connector.
6 Loosen the 2 screws. There is no hook around fan
motor, always support the
fan motor to prevent it from
dropping off while loosening
the screws.
7
8
Unfasten the 2 hooks
and remove the fan
motor fixing plate.
Remove the other fan
motor fixing plate in the
same way.
When reassembling, align
the V mark on the fan motor
with the fan motor fixing
plate contacting part and
tighten the screw so that
there is no clearance left.
9 Remove the fan rotor
assembly.
Step Procedure Points
Glass tube
Fan motor connector (R22723)
(R22724)
Fan motor fixing plate Hook
Hook
(R22725)
V Mark
(R22726)
Fan rotor assembly
(R22727)

Fan Motor / Fan Rotor Si071562E
16 Removal Procedure
4. Remove the fan motor.
1 Use a hexagonal
wrench key to remove
the fan rotor fixing
screw.
2 Remove the fan rotor
from the fan rotor shaft.
3 Use a hexagonal
wrench key to remove
the fan rotor fixing
screw and remove the
fan motor.
Step Procedure Points
(R22728)
Fan rotor
Fan rotor shaft (R22729)
Fan motor (R22730)

Revision History
Month / Year Version Revised contents
01 / 2016 Si071562E First edition

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/products/ac/
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
zSpecifications, designs and other content appearing in this brochure are current as of January 2016 but subject to change without notice. Si071562E
01/2016 AK.B