Daikin 3MKS71ESG Manuale utente

REMOVAL

PROCEDURE

SERVICE MANUAL

6.8/7.1/7.5 kW Class

Outdoor Unit

Inverter

Multi Type

Si121294EA

Service Manual

Removal Procedure

Outdoor Unit

zCooling Only zHeat Pump

3MKS71ESG 3MXS68KVM

3MKS71FSG

3MKS75KVM

Si121294EA

Removal Procedure 1

Table of Contents

1. Outer Panels ...........................................................................................2

2. Electrical Box ..........................................................................................3

3. PCBs .......................................................................................................7

4. Fan Motor..............................................................................................10

5. Sound Blankets .....................................................................................11

6. Coils / Thermistors ................................................................................13

7. Four Way Valve.....................................................................................15

8. Distributor..............................................................................................16

9. Compressor...........................................................................................17

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

The illustrations are for heat pump models as representative.

Outer Panels Si121294EA

2Removal Procedure

1. Outer Panels

Warning Be sure to wait for 10 minutes or more after turning off all power supplies before

disassembling work.

Step Procedure Points

1Remove the 4 screws of

the top panel and the 6

screws of the front panel.

2Remove the 4 screws of

the discharge grille.

3Remove the screw of the

shield plate.

4Unfasten the 2 hooks

and remove the shield

plate.

5Remove the 2 screws of

the stop valve cover.

Top panel

Discharge grille Front panel

(R10351)

Shield plate

(R11204)

(R17754)

Hook

(R17931)

Stop valve

cover

Si121294EA Electrical Box

Removal Procedure 3

2. Electrical Box

Warning Be sure to wait for 10 minutes or more after turning off all power supplies before

disassembling work.

Step Procedure Points

1Disconnect the

connectors for the

electronic expansion

valve coils [S20] [S21]

[S22].

[S20]: white

[S21]: red

[S22]: blue

2Remove the connector

for the four way valve

coil [S80].

The cooling only models

have no harness for [S80].

When reassembling, insert

the clamp into the hole as

below.

3Disconnect the

connectors for the

thermistors [S90] [S92]

[S93] and the connector

for the overload

protector [S40].

[S90]: thermistors

(outdoor temperature,

outdoor heat exchanger,

discharge pipe)

[S92]: gas pipe thermistors

[S93]: liquid pipe thermistors

When reassembling, insert

the clamp of the thermistor

ASSY harness into the hole

as below.

When reassembling, insert

the clamp of the electronic

expansion valve coil harness

into the hole as below.

4Disconnect the relay

connector of the

compressor.

[S20] [S21] [S22]

(R16025)

(R11729)

[S80]

Clamp

(R17397)

[S40]

(R2168)

[S90] [S92] [S93]

Thermistor ASSY harness

(R17797)

for [S92]

for [S93]

Electronic expansion

valve coil harness

(R17798)

(R2169)

Electrical Box Si121294EA

4Removal Procedure

5Release the clamp with

pliers.

6Disconnect the reactor

lead wires.

When reassembling, insert

each clamp into the holes as

below.

When reassembling, the

thermistor harness should

be placed between the

electrical box and the reactor

harness as below.

7Remove the screws

and disconnect the

connecting wires,

power supply wires,

and earth wires.

8Remove the 2 screws

of the wire fixture.

Step Procedure Points

(R17066)

Reactor

(R2170)

Reactor

harness

Thermistor

ASSY

(R17884)

Reactor harness

Thermistor

ASSY

harness

(R17800)

Power supply wire

Earth wire

Connecting

wire

Connecting

wire

(R17791)

Wire fixture

Si121294EA Electrical Box

Removal Procedure 5

9Remove the screw of

the electrical box.

10 Remove the screw of

the electrical box.

11 Remove the drip proof

cover.

Step Procedure Points

(R17792)

(R2173)

Drip

proof

cover

(R2174)

Electrical Box Si121294EA

6Removal Procedure

12 Disconnect the

connector for the fan

motor [S70] from the

inverter PCB.

13 Lift up the electrical box

and remove it.

Step Procedure Points

Inverter PCB

[S70]

(R2175)

(R2176)

Electrical box

Si121294EA PCBs

Removal Procedure 7

3. PCBs

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 service

monitor PCB and the

main PCB.

1Remove the screw of

the main PCB and

release the 2 hooks.

2Remove the screw and

release the hook of the

terminal board, and

open the terminal

board.

3Disconnect each

connector on the back

of the terminal board.

(1) white (10) black

(2) blue (11) white

(3) black (12) yellow

(4) brown (13) black

(5) green / yellow (14) black

(6) brown (15) white

(7) red (16) blue

(8) white (17) white

(9) black

Main PCB

Base bar

(R2177)

(R11731)

Terminal board

Hook

(R6575)

(3) (4) (5) (6) (7) (8) (9)

(10)(11)(12)

(13)

(2)

(1)

(17)

(16)

(15) (14)

(R17885)

PCBs Si121294EA

8Removal Procedure

4Detach the fixing tape

for the drip proof plate.

5Remove the drip proof

plate.

6Disconnect the

connectors [S52]

[S102] from the service

monitor PCB.

7Release the 2 hooks to

remove the service

monitor PCB.

8Remove the service

monitor PCB.

9Lift up the main PCB.

Step Procedure Points

(R17794)

Drip proof plate

Fixing tape

(R6578)

[S102]

[S52]

Service

monitor PCB

(R6579)

Hook

Main PCB

(R17795)

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