Daikin RKN18NMVJU User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
18000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001556E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKN18NMVJU

Si001556E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................7
4. PCB.......................................................................................................10
5. Thermistor ASSY / Partition Plate .........................................................12
6. Sound Blankets .....................................................................................16
7. Electronic Expansion Valve Coil / Compressor.....................................17

Outer Panels Si001556E
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 6 screws
and remove the top
panel.
2 Remove the 8 screws
of the front panel.
3 Slide the fan motor
fixing frame to the left
and unfasten the 2
hooks.
Top panel
(R21871)
Front panel
(R21872)
Fan motor fixing frame
Hook
(R21873)

Si001556E Outer Panels
Removal Procedure 3
4
5
Unfasten the 2 hooks
on the right side.
Remove the front panel.
6 Remove the 4 screws
of the discharge grille.
7 Unfasten the 2 hooks
and remove the
discharge grille.
Step Procedure Points
Hook
Front panel
(R21874)
Discharge grille
(R20906)
Hook
Discharge grille
(R21875)

Outdoor Fan / Fan Motor Si001556E
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 Remove the drip proof
cover.
2
3
Disconnect the
connector [S71].
Pull out the bottom
clamp of the fan motor
lead wire.
[S71]: fan motor
4 Release the fan motor
lead wire from the
groove.
Drip proof cover
(R21876)
[S71]
Clamp
Fan motor
lead wire
(R21877)
Groove
(R21878)

Si001556E Outdoor Fan / Fan Motor
Removal Procedure 5
5 Remove the nut and
remove the outdoor fan.
Nut size : M8
Align the mark of the
outdoor fan with the D-cut
section of the motor shaft
when reassembling.
When reassembling, put the
fan motor lead wire through
the back of the fan motor so
as not to be entangled with
the outdoor fan.
6 Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
Step Procedure Points
Nut Outdoor fan
(R21879)
13 mm
(0.51 inch)
(R18965)
Lead wire Outdoor fan
(R3249)
Fan motor fixing frame
(R21880)
Hook (R20916)

Outdoor Fan / Fan Motor Si001556E
6Removal Procedure
7 Unfasten the 3 hooks
on the fan motor fixing
frame and release the
fan motor lead wire.
8 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
Fan motor lead wire
Hook
(R21881)
Fan motor
(R21882)

Si001556E Electrical Box
Removal Procedure 7
3. Electrical Box
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 terminal cover.
2
3
Open the terminal cover
and pull down to
unfasten the 2 hooks.
Remove the terminal
cover.
4
5
6
Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
Loosen the 2 lock nuts
and remove the 2
conduits.
Remove the connecting
wire and power supply
wire.
Terminal cover
(R21883)
Hook
(R21884)
123
Connecting wire Power supply wire
Lock nut
Conduit
Terminal board
(R21885)

Electrical Box Si001556E
8Removal Procedure
7 Remove the 2 screws
and remove the conduit
mounting plate.
When reassembling, be sure
to fit the 2 hooks on the
conduit mounting plate to the
right side panel.
8 Remove the 2 screws.
9 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
10 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.
Step Procedure Points
Conduit
mounting
plate
(R21886)
(R21918)
Hook
(R21887)
[S20]
(R21888)
Connector Reactor
(R21889)