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.

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

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)

This manual suits for next models

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