Daikin Si12-992 User manual

REMOVAL

PROCEDURE

SERVICE MANUAL

Outdoor Unit

Inverter

Multi Type

4.0/5.0 kW Class

Si12-992

Service Manual

Removal Procedure

Outdoor Unit

zHeat Pump

2MXU40GV1B

2MXU50GV1B

Si12-992

Removal Procedure 1

Table of Contents

1. Removal of Humidifier Unit .....................................................................2

2. Removal of Heater ASSY / Humidifying Rotor

(Moisture Adsorption Element) / Humidifying Rotor Motor......................5

3. Removal of Damper Motor ......................................................................9

4. Removal of Limit Switch / Humidifying Thermistor................................11

5. Removal of Fan-valve-duct ASSY.........................................................14

6. Removal of Hygroscopic Fan Rotor / Hygroscopic Fan Motor ..............16

7. Removal of Panels and Plates ..............................................................17

8. Removal of Electrical Box .....................................................................20

9. Removal of PCB....................................................................................25

10.Removal of Sound Blankets..................................................................31

11.Removal of Propeller Fan / Fan Motor ..................................................34

12.Removal of Thermistors ........................................................................37

13.Removal of Compressor .......................................................................39

14.Removal of Four Way Valve / Electronic Expansion Valve...................41

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

Removal of Humidifier Unit Si12-992

2Removal Procedure

1. Removal of Humidifier Unit

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

before disassembling work.

Step Procedure Points

1. External appearance

2. Removal of the humidifier

unit

1Remove the 4 screws

and lift up the top panel

to remove.

}

(R9880)

Humidifier unit

Air outlet

(R9881)

Air inlet

(R9882)

Top panel

Si12-992 Removal of Humidifier Unit

Removal Procedure 3

2Remove the screw,

and the hose cover.

3Take out the

humidifying hoses.

4The figure shows the

arrangement of the

relay harness.

Be sure to wait 10 minutes

or more after turning off the

power supply before

disconnecting the

connectors.

Step Procedure Points

(R9883)

Hose cover

(R9884)

Humidifying hose

(R9885)

Removal of Humidifier Unit Si12-992

4Removal Procedure

5Disconnect the 4 relay

connectors.

Do not pull the harnesses

from the outdoor unit

strongly so as not to loose

the hook of the mounting

plate.

(See the illustration below

on this page for the

mounting plate.)

6Disconnect the

connector for humidifier

fan motor.

Be sure to wait 10 minutes

or more after turning off the

power supply before

disconnecting the

connectors.

Pull out the connector while

pushing up the hook on the

bottom side.

When lifting up the

humidifier unit, be careful

not to pull the relay

harnesses forcibly.

When reassembling the

humidifier unit, make sure

the mounting plate is

hooked (refer to page 21)

and do not forget to connect

the relay connectors.

7Remove the 4 screws

of the humidifier unit

and lift it up to remove.

Step Procedure Points

(R9886)

Relay connectors

(R9887)

Humidifier

fan motor

(R5796)

}

(R9888)

Humidifier unit

Mounting plate

Hook

Si12-992 Removal of Heater ASSY / Humidifying Rotor (Moisture Adsorption Element) / Humidifying Rotor Motor

Removal Procedure 5

2. Removal of Heater ASSY / Humidifying Rotor

(Moisture Adsorption Element) / Humidifying

Rotor Motor

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

before disassembling work.

Step Procedure Points

Internal structure of the

humidifier unit

Preparation

Remove the top panel

according to "Removal of

Humidifier Unit".

The humidifying rotor is

located under the heater

ASSY and the duct.

1. Removal of the heater

ASSY

1Remove the 4 screws

of the duct on

adsorption side.

(R9889)

Duct (adsorption side)

Heater

ASSY

Humidifying

rotor motor

Harness ASSY

Limit switch

Damper

motor

Humidifying thermistor

Fan-valve-duct ASSY

(R9890)

Removal of Heater ASSY / Humidifying Rotor (Moisture Adsorption Element) / Humidifying Rotor Motor Si12-992

6Removal Procedure

2Detach the harness for

heater from the groove.

3Remove the duct.

4Release the lead wire

for humidifying rotor

motor from 2 hooks.

Step Procedure Points

(R9891)

(R9892)

Duct (adsorption side)

(R9893)

Si12-992 Removal of Heater ASSY / Humidifying Rotor (Moisture Adsorption Element) / Humidifying Rotor Motor

Removal Procedure 7

5Remove the 2 screws

to remove the heater

ASSY.

Do not dismount the heater

ASSY.

2. Removal of the

humidifying rotor.

1Detach the lead wire

for fan motor from the

groove.

2Remove the bell mouth

on adsorption side.

Step Procedure Points

(R9894)

(R9898)

Fan motor lead wire

(R9899)

Bell mouth

Removal of Heater ASSY / Humidifying Rotor (Moisture Adsorption Element) / Humidifying Rotor Motor Si12-992

8Removal Procedure

3Lift the humidifying

rotor up to remove.

A heat catalyst (black) is

applied on the upper side.

3. Removal of the

humidifying rotor motor

1Disconnect the

connector for the

humidifying rotor

motor.

2Remove the 2 screws

of the humidifying rotor

motor.

Step Procedure Points

(R9900)

Humidifying rotor

(R9901)

(R9902)

Humidifying rotor

motor

Rotor driving

part

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