Daikin 4MKD90BVM User manual

REMOVAL

PROCEDURE

SERVICE MANUAL

8.0/9.0 kW Class

Outdoor Unit

Inverter

Multi Type

Si12-796

Service Manual

Removal Procedure

Outdoor Unit

zCooling Only zHeat Pump

4MKD90BVM 4MXD80BVMA

4MKD90BVMA

4MKD90BVMD

Si12-796

Removal Procedure 1

Table of Contents

1. Removal of Outer Panels ........................................................................2

2. Removal of Propeller Fans......................................................................5

3. Removal of Electrical Box .......................................................................6

4. Removal of PCB....................................................................................13

5. Removal of Fan Motor...........................................................................16

6. Removal of Electronic Expansion Valve and Thermistor ......................18

7. Removal of Sound Blanket and Reactor ...............................................19

8. Removal of Shunt..................................................................................21

9. Removal of Solenoid Valve and Four Way Valve .................................22

10.Removal of Compressor .......................................................................24

Note: The illustrations may be slightly different depending on the model.

The illustrations are for heat pump models as representative.

Removal of Outer Panels Si12-796

2Removal Procedure

1. Removal of Outer Panels

Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies

before disassembling work.

Step Procedure Points

1External appearance.

Remove the piping in the

backward direction.

2Remove 11 screws of

the top panel.

Handle

(R2208)

Outdoor air

thermistor

Piping connection slot

(R2209)

(R2210)

Si12-796 Removal of Outer Panels

Removal Procedure 3

3Unscrew 3 screws of

the right panel, slide it

downwards and release

the tabs to remove.

4The figure shows the

view of piping

connections.

5Unscrew 1 screw of the

front right panel, slide it

downwards and release

the tabs to remove.

Step Procedure Points

Right panel

(Main unit side)

Tabs

(Right panel side)

(R2211)

PC board

for servicing

Servicing port

for gas pipe

Servicing port

for fluid pipe

C port

D port

A port

B port

Insects

stopper

shield

(R2212)

Front right panel

Tabs

(R2213)

Removal of Outer Panels Si12-796

4Removal Procedure

6Unscrew 3 screws of

the front panel to

remove.

7Remove 4 screws of

the discharge outlet

grille.

8Slide the discharge

outlet grille upwards

and release 6 tabs to

remove.

Step Procedure Points

(R2214)

(R2215)

Tabs

(R2216)

Si12-796 Removal of Propeller Fans

Removal Procedure 5

2. Removal of Propeller Fans

Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies

before disassembling work.

Step Procedure Points

Remove the discharge

outlet grille.

1To take off propeller

fan, remove the

washer-fitted nut M8.

2Remove the propeller

fan.

For reassembling, align the

mark of the propeller fan

with the D-cut section of

motor shaft.

Mount the propeller fan while

positioning the mark to

the top.

D cut

Washer-fitted nut M8

(R2217)

mark (R2218)

Removal of Electrical Box Si12-796

6Removal Procedure

3. Removal of Electrical Box

Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies

before disassembling work.

Step Procedure Points

Remove the outer panels

such as top and front

panels.

Match the colors of the tie

wires to A, B, C and D ports

as follows.

(1) - Black Power

(2) - White Power

(3) - Red Transmission

Wires are fixed to the

terminal board with screws.

1The figure shows the

right side view.

1. Remove the tie wire.

1Loosen the terminal

board screws, and

remove the wires at A

and B ports.

2Open the terminal

board cover, and

remove the wires at C

and D ports.

When reassembling,

reconnect the wires to C and

D ports.

PC board for servicing

Power terminal board

(L) - White

(N) - Black

Earth terminal

screw

A port B port

D port

C port

Wiring fixture

(R2219)

(R2220)

Terminal

board

cover

(R2221)

Si12-796 Removal of Electrical Box

Removal Procedure 7

3Remove the earth wire.

4Remove 1 screw of the

terminal board.

5Release the tab on the

top right of the terminal

board.

6Pull out the terminal

board and open it.

Glass tube fuse and varistor

cannot be replaced

individually because lead-

free soldering is provided.

Step Procedure Points

(R2222)

(R2223)

(R2224)

Ta b

Glass tube fuse (Soldered)

Varister

(R2225)

Removal of Electrical Box Si12-796

8Removal Procedure

2. Remove each wire harness.

1Disconnect 4

connectors of the

electronic expansion

valve lead wires.

When reconnecting, make

sure to match the wire to the

correct connector.

2Remove the four way

valve connector [S80].

The cooling only models do

not have harness for [S80].

3Remove the connector

[S93] for liquid pipe

thermistor.

Step Procedure Points

[S20]

white

[S21]

red

[S22]

blue

[S23]

yellow

(R2226)

(R2227)

Connector Electronic

expansion

valve No.

Harness

length

[S20] (White) EVA 630

[S21] (Red) EVB 730

[S22] (Blue) EVC 825

[S23]

(Yellow)

EVD 940

[S80]

(R2228)

[S93]

(R2229)

This manual suits for next models

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