Daikin RX09N5VL User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
9000/12000 Btu/h Class
Si001418E

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RX09N5VL
RX12N5VL

Si001418E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box / PCB ................................................................................6
4. Thermistor ASSY ..................................................................................11
5. Sound Blankets .....................................................................................15
6. Reactor / Electronic Expansion Valve Coil / Partition Plate ..................16
7. Four Way Valve.....................................................................................18
8. Compressor...........................................................................................20
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001418E
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
1 Remove the 3 screws
and remove the top
panel.
2 Remove the 4 screws
of the front panel.
3
4
Unfasten the 3 left side
hooks, and then the 2
right side hooks.
Remove the front panel.
Top panel
(R20815)
Front panel
(R20816)
Hook
Front panel
Hook
(R20817)

Si001418E Outer Panels
Removal Procedure 3
5
6
Rotate the discharge
grille to the left to
unfasten the 6 hooks.
Remove the discharge
grille.
Step Procedure Points
Discharge grille
(R20818)

Outdoor Fan / Fan Motor Si001418E
4Removal Procedure
2. 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 Disconnect the
connector [S70] and
pull out the clamp.
[S70]: fan motor
2 Release the fan motor
lead wire from the
groove.
3
4
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
Nut size: M6
Align the mark of the
outdoor fan with the D-cut
section of the motor shaft
when reassembling.
Clamp
[S70]
(R20819)
Fan motor lead wireGroove
(R20820)
Outdoor fan
Nut
(R20821)
10 mm
(0.39 inch)
(R18954)

Si001418E Outdoor Fan / Fan Motor
Removal Procedure 5
5 Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the
lower hooks into the bottom
frame.
6 Open the 3 hooks and
release the fan motor
lead wire.
7 Remove the 3 screws
from the fan motor.
8 Remove the fan motor.
Step Procedure Points
Fan motor fixing frame
(R20822)
Hook (R20823)
Hook
(R20824)
Fan motor
(R20825)
(R20826)

Electrical Box / PCB Si001418E
6Removal Procedure
3. Electrical Box / PCB
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 electrical box. 1: black, front
2: white, front
3: red, front
1 Disconnect the 3
connectors from the
terminal board.
2 Remove the screw and
detach the earth /
ground wire.
3 Disconnect the
connector [S80].
[S80]: four way valve coil
Connector
(R20827)
Earth / ground wire
(R20829)
[S80]
(R20830)

Si001418E Electrical Box / PCB
Removal Procedure 7
4 Disconnect the 2
connectors from the
reactor.
When reassembling, you
can reconnect the 2
connectors for the reactor in
either way regardless of the
color.
5 Disconnect the
connector [S30].
[S30]: compressor motor
6 Disconnect the
connector [S40].
[S40]: overload protector
Step Procedure Points
Connector
Reactor (R20831)
[S30]
(R20832)
[S40]
(R20833)

Electrical Box / PCB Si001418E
8Removal Procedure
7 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
8 Disconnect the
connector [S90].
[S90]: thermistors
9 Pull out the clamp.
Step Procedure Points
[S20] (R20834)
[S90] (R20835)
Clamp (R20836)

Si001418E Electrical Box / PCB
Removal Procedure 9
10 Remove the screw of
the electrical box.
11 Slide the electrical box
to the right and lift up to
remove it.
There are 2 hooks at the
bottom and the top back of
the electrical box.
2. Remove the PCB.
1 Remove earth / ground
screw.
Step Procedure Points
Electrical box
(R20837)
(R20838)
Hook (R20839)
Earth / ground screw (R20840)

Electrical Box / PCB Si001418E
10 Removal Procedure
2
3
Remove the 3 screws
of the PCB.
Unfasten the 2 spacers
and the 2 hooks from
the PCB.
4 Remove the PCB.
Step Procedure Points
Hook
Spacer
Hook
(R20841)
PCB
(R20842)

Si001418E Thermistor ASSY
Removal Procedure 11
4. Thermistor ASSY
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 screw.
2 Slide the stop valve
cover downward and
remove it.
When reassembling, make
sure to fit the 3 hooks.
(R20843)
Stop valve
cover
(R20844)
Hook
(R20845)

Thermistor ASSY Si001418E
12 Removal Procedure
3 Remove the 3 screws
and remove the wire
fixture.
4 Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and the
power supply wire.
5 Remove the 3 screws
of the right side panel.
Step Procedure Points
Wire fixture
(R20846)
Terminal
board
Power supply wireConnecting wire
(R20847)
Right side
panel
(R20848)

Si001418E Thermistor ASSY
Removal Procedure 13
6
7
Pull out the outdoor
temperature thermistor
holder.
Slide upward the right
side panel to unfasten
the hook.
8 Remove the right side
panel.
9
10
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
Step Procedure Points
Hook
Outdoor temperature thermistor holder
(R20849)
Right side panel
(R20850)
Outdoor heat
exchanger thermistor
Clamp
(R20851)
(R20852)
Cilp

Thermistor ASSY Si001418E
14 Removal Procedure
11 Pull out the discharge
pipe temperature
thermistor and remove
the thermistor ASSY.
Be careful not to lose the
fixture for the thermistor.
Step Procedure Points
Discharge pipe
temperature
thermistor
(R20853)
Thermistor ASSY
(R20855)
(R20854)
Fixture

Si001418E Sound Blankets
Removal Procedure 15
5. Sound Blankets
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 sound
blanket (top).
The design of sound blanket
varies depending on the
model.
Since the piping ports on the
sound blanket are torn
easily, remove the blanket
carefully.
2 Detach the fastener and
pull out the sound
blanket (outer).
3 Pull out the sound
blanket (inner).
Sound blanket (top)
(R20856)
Sound blanket
(outer)
(R20857)
Sound blanket
(inner)
(R20858)

Reactor / Electronic Expansion Valve Coil / Partition Plate Si001418E
16 Removal Procedure
6. Reactor / Electronic Expansion Valve Coil /
Partition Plate
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 2 screws
of the reactor.
2 Slide upward the
reactor and remove it.
3Pull out the electronic
expansion valve coil.
Reactor
(R20859)
Reactor
(R20860)
Electronic
expansion
valve coil
(R20861)

Si001418E Reactor / Electronic Expansion Valve Coil / Partition Plate
Removal Procedure 17
4 Remove the 2 screws
of the partition plate.
5 Lift up the partition plate
and remove it.
When reassembling, fit the
hook on the bottom frame.
Step Procedure Points
Partition plate
(R20862)
Partition plate
(R20863)
Hook
(R20864)

Four Way Valve Si001418E
18 Removal Procedure
7. Four Way Valve
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by
the gas brazing machine.
If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is
exposed to flames, toxic gas may be generated.)
Caution From the viewpoint of global environment protection, do not discharge the refrigerant
gas in the atmosphere. Make sure to collect all the refrigerant gas.
Restore the piping by non-oxidation brazing.
Note Before working, make sure that the refrigerant gas is empty in the circuit.
Be sure to apply nitrogen replacement when heating up the brazed part.
Do not use a metal saw for cutting pipes by all means because the sawdust comes into
the circuit.
When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes
may get deformed.
Provide a protective sheet or a steel plate so that the brazing flame cannot influence
peripheries.
Be careful so as not to burn the compressor terminals, the name plate, the outdoor
heat exchanger fin.
In case of difficulty with gas brazing machine.
1. Disconnect the brazed part where is easy to disconnect and restore.
2. Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect.
Step Procedure Points
1 Remove the screw and
remove the four way
valve coil.
Four way valve
Four way valve coil
(R20865)