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)