Daikin RK18NMVJU User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
15000/18000/24000 Btu/h Class
Si001555EC

Service Manual
Removal Procedure
Outdoor Unit
Cooling Only Heat Pump
RK18NMVJU RX18NMVJU
RK24NMVJU RX24NMVJU
RKN24NMVJU RX15QMVJU
RX18QMVJU
RX15RMVJU
RX18RMVJU
RX18RMVJU9
RX24RMVJU
RXN18NMVJU
RXN24NMVJU
RXL15QMVJU

Si001555EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................7
4. PCB.......................................................................................................11
5. Thermistor ASSY / Partition Plate .........................................................14
6. Sound Blankets .....................................................................................17
7. Electronic Expansion Valve / Four Way Valve......................................19
8. Compressor...........................................................................................22
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001555EC
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
(R21947)
Front panel
(R21948)
Hook
Fan motor fixing frame
(R21949)

Si001555EC 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
(R21950)
Discharge grille (R21951)
(R21952)

Outdoor Fan / Fan Motor Si001555EC
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 Remove the 2 screws
of the terminal cover.
3
4
Open the terminal cover
and pull down to
unfasten the 2 hooks.
Remove the terminal
cover.
Drip proof cover
(R21953)
Terminal cover
(R21954)
Hook
(R21955)

Si001555EC Outdoor Fan / Fan Motor
Removal Procedure 5
5 Disconnect the
connector [S70].
[S70]: fan motor
6 Pull out the clamp of the
fan motor lead wire (on
the outer side of the
electrical box).
7 Release the fan motor
lead wire from the
groove and unfasten
the 2 hooks.
When reassembling, fit the
fan motor lead wire into the
slit at the back of the fan
motor fixing frame.
Step Procedure Points
[S70]
(R21956)
Top view
Clamp
Fan motor
lead wire
Clamp
(R21957)
Hook Fan motor lead wireGroove
(R21958)
Fan motor fixing frame Slit
(R21959)

Outdoor Fan / Fan Motor Si001555EC
6Removal Procedure
8 Remove the nut and
remove the outdoor fan.
Nut size : M8
9 Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
10 Unfasten the 3 hooks
on the fan motor fixing
frame and release the
fan motor lead wire.
11 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
Outdoor fan
Nut (R21960)
13 mm
(0.51 inch)
(R18965)
Fan motor fixing frame
(R21961)
Hook
(R20916)
Hook
Fan motor lead wire
(R21962)
Fan motor
(R21963)

Si001555EC 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
2
Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
Loosen the 2 nuts of the
conduits and remove
the connecting wire and
power supply wire.
3 Remove the 2 screws
and remove the conduit
mounting plate.
When reassembling, fit the 2
hooks of the conduit
mounting plate to the right
side panel.
4 Remove the 2 screws.
Power
supply
wire
Connecting wire
Nut
Conduit
Terminal board
(R21964)
Conduit
mounting
plate
(R21965)
Hook
Right side
panel
(R21966)
(R20921)

Electrical Box Si001555EC
8Removal Procedure
5 Disconnect the
connector [S80] and
pull out the clamp (Hole
No.1).
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
When reassembling,
connect the connectors in
the following order. Be sure
to insert the wiring clamps of
lead wires into the
appropriate holes.
(1) [S90]: Hole No.15, 14,
13, 7, 3
(2) [S40]: Hole No.16, 2
(3) [S20]: Hole No.11
(4) [S80]: Hole No.1
6 Disconnect the
connector [S20] and
pull out the clamp (Hole
No.11).
[S20]: electronic expansion
valve coil
7
8
Pull out the clamp (Hole
No.16) and disconnect
the connector [S40].
Pull out the clamp (Hole
No.2).
Step Procedure Points
[S80]
Clamp (R21967)
14
151617
13
Hole No. for wiring clamps
1 3 5 7 9 11
2 4 6 8 10 12
(R21996)
[S20]
Clamp
(R21968)
Clamp
Clamp
[S40]
(R21998)
[S40]: overload protector