Daikin RX18N5VL User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
18000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001419E

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RX18N5VL

Si001419E
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 Coil / Four Way Valve...............................18
8. Compressor...........................................................................................21

Outer Panels Si001419E
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
1Remove the 6 screws
and remove the top
panel.
2Remove the 8 screws
of the front panel.
3Slide the fan motor
fixing plate to the left
and unfasten the 2
hooks.
Top panel
(R20902)
Front panel
(R20903)
Hook
Fan motor fixing plate
(R20904)

Si001419E Outer Panels
Removal Procedure 3
4
5
Unfasten the 2 hooks
on the right side.
Remove the front panel.
6Remove the 4 screws
of the discharge grille.
7Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
Hook
Front panel
(R20905)
Discharge grille
(R20906)
Discharge grille
(R20907)

Outdoor Fan / Fan Motor Si001419E
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
1Remove the drip proof
cover.
2Remove 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
(R20908)
Terminal
cover
(R20909)
Hook
Terminal cover
(R20910)

Si001419E Outdoor Fan / Fan Motor
Removal Procedure 5
5Disconnect the
connector [S70].
[S70]: fan motor
6Unfasten the clamp of
the fan motor lead wire
(on the outer side of the
electrical box).
7Release the fan motor
lead wire from the
groove and unfasten
the 2 hooks.
Step Procedure Points
[S70]
(R20911)
Fan motor
lead wire
Clamp
(R20912)
Top view
Fan motor lead wireGrooveHook
(R20913)

Outdoor Fan / Fan Motor Si001419E
6Removal Procedure
8Remove the nut and
remove the outdoor fan.
Nut size : M8
9Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the
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
Nut Outdoor fan (R20914)
13 mm
(0.51 inch)
(R18965)
Fan motor fixing frame
(R20915)
Hook (R20916)
Hook
Fan motor lead wire
(R20917)
Fan motor (R20918)

Si001419E 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
1Remove the 3 screws
and remove the wire
fixture.
2Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
3Remove the 2 screws.
Wire fixture
(R20919)
Connecting wire Power supply wire
Terminal board
(R20920)
(R20921)

Electrical Box Si001419E
8Removal Procedure
4Disconnect the
connector [S80] and
pull out the clamp (Hole
No.5).
[S80]: four way valve coil
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.10
(4) [S80]: Hole No.5
5Disconnect the
connector [S20] and
pull out the clamp (Hole
No.10).
Step Procedure Points
[S80]
Clamp
(R20922)
14
1516
13
Hole No. for wiring clamps
135 7 911
2 4 6 8 10 12
(R20993)
[S20]
Clamp
(R20923)
[S20]: electronic expansion
valve coil