Daikin RXZ25NV1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.5/3.5/5.0 kW Class
Si001362E

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RXZ25NV1B
RXZ35NV1B
RXZ50NV1B

Si001362E
Removal Procedure 1
Table of Contents
1. Humidifier Unit.........................................................................................2
2. Heater Assembly.....................................................................................4
3. Humidifying Rotor Motor .........................................................................6
4. Hygroscopic Fan Motor...........................................................................7
5. Humidifier Fan Assembly / Damper Assembly........................................8
6. Discharge Grille / Suction Grilles ..........................................................10
7. Outer Panels / Outdoor Fan / Fan Motor...............................................11
8. Duct Assembly / Right Side Panel ........................................................14
9. Electrical Box ........................................................................................16
10. PCB......................................................................................................19
11. Reactor / Thermistor Assembly / Partition Plate ..................................21
12. Sound Blankets ....................................................................................24
13. Four Way Valve / Electronic Expansion Valve .....................................25
14. Compressor..........................................................................................28
Note: The illustrations may be slightly different depending on the model.

Humidifier Unit Si001362E
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
1. Appearance Features
2. Remove the top panel and
the stop valve cover.
1
2
3
Remove the 4 screws
and remove the top
panel.
Remove the screw of
the stop valve cover.
Slide the stop valve
cover down and remove
it.
(R19564)
Humidifier unit discharge
air outlet (front)
Humidifier unit
air inlet (front)
Humidifier
unit
(R19565)
Gas piping
Suction grille
(adsorption side)
Outdoor
temperature
thermistor
Suction grille
(humidifier side)
Humidifying
hose
Liquid
piping
Top panel
Hook
Hook
Stop valve cover
(R19566)

Si001362E Humidifier Unit
Removal Procedure 3
3. Remove the humidifier
unit.
1 Disconnect the relay
connectors of each
harness.
2 Remove the 4 screws
and remove the
humidifier unit.
When reassembling the
humidifier unit, do not forget
to connect the relay
connectors.
When reassembling the
humidifier unit, make sure to
connect the duct assembly
and the lower damper case
inside the humidifier unit.
Step Procedure Points
Relay connector
(R19568)
(R19569)
Humidifier unit
Duct assembly
(R19570)
Relay connector
Lower damper case

Heater Assembly Si001362E
4Removal Procedure
2. Heater Assembly
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Inner structure of the
humidifier unit
2. Remove the heater
assembly.
1
2
Release the harnesses
from the hook.
Remove the 3 screws
and remove the duct
(adsorption side).
3 Release the harnesses
from the 3 hooks.
When reassembling, these
harnesses must be fit in the
following hooks.
• Humidifying rotor motor
•Damper motor
•Limit switch
•Humidifying thermistor
→Hook (a) and hook (b)
•Hygroscopic fan motor
→Hook (b) and hook (c)
•Heater
→ Hook (c) only
Hook
Duct
(adsorption side)
Hygroscopic fan
motor harness
Heater
assembly
Humidifier
fan motor
Humidifying
rotor motor
Damper
motor
Humidifying
thermistor
(R19571)
Hook
Duct
(adsorption side)
(R19572)
Hook (a)
Hook (c) Hook (b)
(R19573)

Si001362E Heater Assembly
Removal Procedure 5
4 Remove the 2 screws
and remove the heater
assembly.
5 Unfasten the projection
of the heater assembly
from the slit on the
support plate.
When reassembling, insert
the projection of the heater
assembly to the slit on the
support plate.
Step Procedure Points
Heater assembly
(R19574)
Support plate
(R19575)

Humidifying Rotor Motor Si001362E
6Removal Procedure
3. 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 humidifying
rotor.
1Release the
hygroscopic fan motor
lead wire from the hook.
2Remove the bell mouth.
3Remove the
humidifying rotor.
2. Remove the humidifying
rotor motor.
1
2
Disconnect the
humidifying rotor motor
lead wire.
Remove the 2 screws
and remove the
humidifying rotor motor.
Hook Hygroscopic fan motor
lead wire (R19576)
Bell mouth
(R19577)
(R19578)
Humidifying
rotor
(R19579)
Humidifying
rotor motor
Humidifying rotor
motor lead wire

Si001362E 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
1. Remove the hygroscopic
fan.
Nut size: M6
When reassembling, align
the mark of the fan with
the D-cut section of the
motor shaft.
1 Remove the nut and
remove the hygroscopic
fan.
2. Remove the hygroscopic
fan motor.
1 Remove the 3 screws
and remove the
hygroscopic fan motor
cover.
2 Remove the
hygroscopic fan motor.
Nut
(R19580)
Hygroscopic fan 10 mm
(0.39 inch)
(R18954)
(R19581)
Hygroscopic fan motor cover
(R19582)
Hygroscopis fan motor

Humidifier Fan Assembly / Damper Assembly Si001362E
8Removal Procedure
5. Humidifier 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 6 screws.
2Unfasten the 2 hooks
while bending the right
side panel.
3Remove the humidifier
fan assembly (front)
with the damper
assembly (back)
attached.
(R19583)
Hook
Hook
(R19584)
(R19585)
Humidifier fan assembly (front)
with damper assembly (back)