Daikin RX15FVJU User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
15000/18000/24000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si00-976

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RX15FVJU
RX18FVJU
RX24FVJU
RXS15DVJU
RXS18DVJU
RXS24DVJU

Si00-976
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Outdoor Fan / Fan Motor .....................................................6
3. Removal of PCBs / Electrical Box .........................................................10
4. Removal of Reactor ..............................................................................17
5. Removal of Sound Blankets..................................................................19
6. Removal of Electronic Expansion Valve ...............................................21
7. Removal of Compressor .......................................................................22
Note: The illustrations may be slightly different depending on the model.

Removal of Outer Panels Si00-976
2Removal Procedure
1. Removal of Outer Panels
Procedure 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 panels.
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
1Remove the 4 screws
and lift the top panel.
2Remove the 4 screws
and remove the
discharge grille.
Slide the discharge grille
upward and remove it.
Top panel
(R16425)
(R16426)
Discharge grille (R16559)

Si00-976 Removal of Outer Panels
Removal Procedure 3
The discharge grille has 4
hooks.
3Remove the 6 screws
of the front panel.
4Push the front panel
and lift the shield plate
to unfasten the hooks.
Step Procedure Points
(R2679)
Front panel
(R2680)
Shield plate
(R16560)
(1) Push the
front panel.
(2) Lift the shield
plate upwards.

Removal of Outer Panels Si00-976
4Removal Procedure
5Unfasten the left side
hooks, and then the
right side hook.
Remove the front panel.
Lift the front panel while
pushing the left side panel
inward.
Lift the front panel and
unfasten the right side hook.
When reassembling the
front panel, fit the right side
hook first.
Step Procedure Points
(R5249)
(R5250)
(R5251)

Si00-976 Removal of Outer Panels
Removal Procedure 5
2. Remove the stop valve
cover.
1Remove the screw of
the stop valve cover.
2Pull the stop valve
cover downward to
unfasten the hooks and
remove it.
The stop valve cover has 6
hooks.
Step Procedure Points
Stop valve cover
(R5252)
(R16679)
(R16680)

Removal of Outdoor Fan / Fan Motor Si00-976
6Removal Procedure
2. Removal of Outdoor Fan / Fan Motor
Procedure 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
cover.
Preparation
Remove the top panel and
the front panel according to
the “Removal of Outer
Panels”.
This procedure is not
necessary to remove the
outdoor fan only.
1Remove the screw of
the shield plate.
2Unfasten the 2 hooks
and remove the shield
plate.
3Release the 4 hooks of
the electrical box cover
and remove it.
(R16429)
Shield plate
Claws
(R17063)
Electrical
box cover
(R2690)

Si00-976 Removal of Outdoor Fan / Fan Motor
Removal Procedure 7
2. Remove the fan motor.
1Disconnect the
connector for the fan
motor [S70].
2The illustration shows
arrangement of the fan
motor lead wire.
Step Procedure Points
(R16431)
[S70]
(R2692)
Fan motor lead wire (R2693)

Removal of Outdoor Fan / Fan Motor Si00-976
8Removal Procedure
3Remove the nut of the
outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
4Remove the 2 lower
screws from the fan
motor first.
Be sure to remove the lower
screws first. If the top
screws are removed first,
the fan motor may tilt down
or fall and cause injury
because its center of gravity
is shifted to the front.
5Then, remove the 2
upper screws.
Step Procedure Points
Outdoor fan
(R2694)
10 mm
(R12236)
(R2695)
Fan motor
(R2696)

Si00-976 Removal of Outdoor Fan / Fan Motor
Removal Procedure 9
6Release the fan motor
lead wire from the 2
hooks and pull the fan
motor out.
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.
Step Procedure Points
(R2697)

Removal of PCBs / Electrical Box Si00-976
10 Removal Procedure
3. Removal of PCBs / Electrical Box
Procedure 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 right side
panel.
Preparation
Remove the top panel and
the front panel according to
the “Removal of Outer
Panels”.
Colors of the connection
wires are as follows.
(1) black
(2) white
(3) red
( ) yellow / green
1
2
Remove the 4 screws
and disconnect the
connection wire and the
power supply wire.
Remove the 2 screws
and detach the earth /
ground wires.
3Remove the 3 screws
of the right side panel.
4Remove the screw of
the electrical box.
(R18591)
Terminal board
Connection
wire
Power supply
wire
Earth /
ground wire
(R16506)
Right side
panel
(R16507)

Si00-976 Removal of PCBs / Electrical Box
Removal Procedure 11
5Unfasten the hooks and
remove the right side
panel.
When reassembling, insert
the upper hook and the 2
lower hooks back into place.
2. Remove the service
monitor PCB.
1Release the harness
from the hook.
2Disconnect the
connectors [S52]
[S102] from the service
monitor PCB.
3Remove the service
monitor PCB.
4Remove the screw of
the terminal board.
3. Remove the main PCB.
1Unfasten the hook to
release the terminal
board.
Open the terminal
board.
Step Procedure Points
(
R7028
)
Hook
(R7026)
Hook
(R17064)
Terminal board
Hook
[S52]
Service monitor PCB
[S102]
(R2705)

Removal of PCBs / Electrical Box Si00-976
12 Removal Procedure
2Disconnect the
harnesses from the
power supply PCB.
power supply PCB
[HL] (black): terminal board
[HE2] (yellow/green): earth /
ground
[HAC1] (black): main PCB
(AC1)
[HE1] (yellow/green): main PCB
(E)
3Disconnect the
connectors of the front
side.
[S20]: electronic expansion
valve
[S40]: overload protector
[S90]: thermistors
When reassembling, insert
each clamp into the holes.
When reassembling, the
thermistor harness should
be placed between the
electrical box and the
reactor harness as below.
Step Procedure Points
(R2706)
HE1 V3 (varistor)
HE2 HL (R17032)
(R16458)
[S20]
[S40] [S90]
Reactor
harness
Thermistor
ASSY
(R17093)
Reactor harness
Thermistor
ASSY

Si00-976 Removal of PCBs / Electrical Box
Removal Procedure 13
4Remove the screw of
the main PCB.
5Unfasten the 2 hooks
and release the main
PCB from the ditch of
the front side.
6Disconnect the
harnesses [S10] [AC2]
while lifting the main
PCB.
7Disconnect the
connectors [S51]
[S101].
Step Procedure Points
Main PCB
Ditch
(R2709)
[S10] [AC2] (white)
(R2710)
[S10] [AC2]: terminal board
(R2711)
[S101] [S51]
[S51] [S101]: service monitor
PCB

Removal of PCBs / Electrical Box Si00-976
14 Removal Procedure
8Disconnect the
connectors and remove
the main PCB.
[S10]: terminal board
[S20]: electronic expansion
valve
[S31]: CN14 on SPM
[S32]: CN11 on SPM
[S33]: [S34] on MID
[S40]: overload protector
[S51]: [S52] on service monitor
PCB
[S71]: [S72] on MID
[S90]: thermistors
[S91]: radiation fin thermistor
[S101]: [S102] on service
monitor PCB
[H1] [H2]: diode bridge
9Disconnect the relay
connector for the
compressor.
Step Procedure Points
[S91]
[S31] [S71] [S33] [S32] [H2]
(blue)
[H1]
(yellow)
(R2712)
[S10]
[S51] [S101] [S20] [S90] [S40] [S91]
[S31]
[S33]
[S32]
[S71]
(R16933)
(R17065)

Si00-976 Removal of PCBs / Electrical Box
Removal Procedure 15
10 Release the clamp with
pliers.
11 Disconnect the 2
connectors for the
reactor.
Step Procedure Points
(R17066)
(R17067)

Removal of PCBs / Electrical Box Si00-976
16 Removal Procedure
12 Pull the clamp and draw
the thermistor harness
out from the back of the
electrical box.
13 Remove the screw of
the electrical box.
14 Lift up and remove the
electrical box.
Step Procedure Points
(R2717)
(R2718)
(R17068)
Electrical box
(R16438)

Si00-976 Removal of Reactor
Removal Procedure 17
4. Removal of Reactor
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Release the clamp with
pliers.
2Remove the 2 screws
of the partition plate.
The partition plate is fixed to
the bottom frame with a
hook.
(R16508)
(R16509)
Partition plate
(R16439)
Hook

Removal of Reactor Si00-976
18 Removal Procedure
3Lift up the partition plate
and remove it.
4Remove the screw.
Slide the reactor
upward and remove it
from the partition plate.
Step Procedure Points
(R16459)
(R2726)
Reactor