Daikin RXR28EV1B8 User manual

REMOVAL

PROCEDURE

SERVICE MANUAL

Outdoor Unit

Inverter

Pair Type

2.8/4.2/5.0 kW Class

Si001275

Service Manual

Removal Procedure

Outdoor Unit

zHeat Pump

RXR28EV1B8

RXR42EV1B8

RXR50EV1B8

Si001275

Removal Procedure 1

Table of Contents

1. Humidifier Unit.........................................................................................2

2. Heater Assembly / Humidifying Rotor / Humidifying Rotor Motor ...........3

3. Humidifying Fan Assembly / Damper Assembly .....................................5

4. Hygroscopic Fan Motor...........................................................................7

5. Outdoor Fan / Fan Motor.........................................................................8

6. Humidifying Duct ...................................................................................12

7. Electrical Box ........................................................................................13

8. PCB.......................................................................................................15

9. Sound Blankets .....................................................................................17

10.Thermistor Assembly ............................................................................19

11.Reactor / Partition Plate ........................................................................21

12.Four Way Valve.....................................................................................22

13.Electronic Expansion Valve...................................................................24

14.Compressor...........................................................................................26

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

Humidifier Unit Si001275

2Removal Procedure

1. Humidifier Unit

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

and remove the top

panel.

2Disconnect the 5 relay

connectors.

3Disconnect the

connector for the

humidifier fan motor.

Pull out the connector while

pushing up the hook on the

bottom side.

When installing the

humidifier unit, do not forget

to connect the relay

connectors.

4Remove the 4 screws

and remove the

humidifier unit.

(R13982)

Top panel

(R5792)

(R13983)

Humidifier fan motor

(R5796)

(R13984)

Humidifier unit

Si001275 Heater Assembly / Humidifying Rotor / Humidifying Rotor Motor

Removal Procedure 3

2. Heater Assembly / Humidifying Rotor /

Humidifying Rotor Motor

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 heater

assembly.

1Remove the 4 screws

and remove the duct on

adsorption side.

2Release the lead wire

for the humidifying

rotor motor from the

hooks.

3Remove the 2 screws

and remove the heater

assembly.

The heater assembly should

be replaced as an assembly

set. (Disassembling of the

assembly may cause

malfunction.)

2. Remove the humidifying

rotor.

1Release the fan motor

lead wire from the

hooks.

(R18766)

Duct on adsorption side

Heater assembly

(R18767)

Humidifying rotor motor

(R5800)

(R18768)

Fan motor lead wire

Hook

Heater Assembly / Humidifying Rotor / Humidifying Rotor Motor Si001275

4Removal Procedure

2Remove the bell mouth

on adsorption side.

3Remove the

humidifying rotor.

A heat catalyst (black) is

applied on the upper side.

3. Remove the humidifying

rotor motor.

1Remove the 2 screws

and remove the

humidifying rotor

motor.

Step Procedure Points

Bell mouth

(R13988)

Humidifying rotor

(Moisture adsorption

element)

(R13989)

(R18769)

Humidifying rotor

motor

Rotor driving part

(R5809)

Si001275 Humidifying Fan Assembly / Damper Assembly

Removal Procedure 5

3. Humidifying Fan Assembly / Damper Assembly

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 humidifying

fan assembly.

1Peel off the 2 tapes.

Remove the 5 screws

of the humidifying fan

assembly.

Unfasten the 2 hooks

while bending the right

side panel.

4Remove the

humidifying fan

assembly.

The humidifying fan

assembly should be

replaced as an assembly

set. (Disassembling of the

assembly can cause a

noise.)

5Peel the seal material

and pull out the

humidifying thermistor.

Inside of the upper part of

the humidifying fan

assembly

(R13990)

Humidifying thermistor

Humidifying fan assembly

(R18365)

Hook

(R5813)

(R5814)

(R5815)

Humidifying Fan Assembly / Damper Assembly Si001275

6Removal Procedure

2. Remove the damper

assembly.

1Remove the 3 screws.

2Remove the damper

assembly.

Remove the screw and

remove the damper

motor.

Disconnect the limit

switch.

Step Procedure Points

(R18770)

Damper assembly

Damper motor

(R13992)

Limit switch

(R5819)

Si001275 Hygroscopic Fan Motor

Removal Procedure 7

4. Hygroscopic Fan Motor

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

disassembling work.

Step Procedure Points

1Remove the nut and

remove the

hygroscopic fan.

Nut size: M6

When reassembling, align

the mark of the fan with

the D-cut section of the

motor shaft.

2Remove the 3 screws

of the motor cover.

3Remove the motor

cover and the

hygroscopic fan motor.

Nut

Hygroscopic

fan

(R13993)

10 mm

(R17216)

(R5822)

Hygroscopic

fan motor

Motor cover

(R13994)

Outdoor Fan / Fan Motor Si001275

8Removal Procedure

5. Outdoor Fan / Fan Motor

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 shield plate. Be careful not to forget to

install, not to lose, and not

to break the shield plate and

the electrical box cover.

1Remove the screw.

2Release the

harnesses.

3Remove the shield

plate.

2. Remove the electrical box

cover.

Remove the screw.

Remove the electrical

box cover.

Shield plate

(R13995)

(R5826)

(R13996)

(R18366)

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