Daikin 4MXS115HV2C User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Multi Type
11.5 kW Class
Si12-996

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
4MXS115HV2C

Si12-996
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Fan Motor...........................................................................12
3. Removal of Electrical Box .....................................................................14
4. Removal of PCBs..................................................................................18
5. Removal of Coils / Thermistors .............................................................23
6. Removal of Sound Blanket....................................................................27
7. Removal of Compressor .......................................................................30

Removal of Outer Panels Si12-996
2Removal Procedure
1. Removal of Outer Panels
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
External appearance
1. Removal of the suction
grille
The hooks are secured in
the clearances of the heat
exchanger fins.
1Release the 3 hooks at
the upper first, and
then, 3 hooks at the
middle.
2Release the 3 hooks at
the bottom.
2. Removal of the top panel
1Remove the 7 screws
and remove the top
panel.
(R9585)
(R9586)
Suction grille
(R9587)
(R9588)
Top panel

Si12-996 Removal of Outer Panels
Removal Procedure 3
3. Removal of the right side
panel
1Remove the 5 screws.
2Slide the right side
panel downward to
release 2 hooks on the
back side.
3Remove the right side
panel.
Step Procedure Points
(R9589)
Right side panel
(R11051)
Hook Holes
Hooks
Hook Holes
(R11052)
(R11053)

Removal of Outer Panels Si12-996
4Removal Procedure
4. Removal of the front
panel (2)
+M5×20
1Remove the 2 screws.
2Slide the front panel (2)
downward to release
the 3 hooks.
Step Procedure Points
(R11054)
Front panel (2)
++
(R11055)
(R9594)

Si12-996 Removal of Outer Panels
Removal Procedure 5
3Remove the front panel
(2).
The insulation sheet is
inserted between the front
panel (2) and the electrical
box.
5. Removal of the front
panel (1)
Remove the discharge grille
and outdoor fan first to
remove the front panel (1).
1Remove the 4 screws
on the discharge grille.
2Pull the bottom of the
discharge grille toward
yourself.
Step Procedure Points
(R11056)
Insulation sheet
(R11057)
Discharge grille
Front panel (1)
(R11058)

Removal of Outer Panels Si12-996
6Removal Procedure
3Remove the fixing nut
and remove the outdoor
fan.
Fan fixing nut : M8
4Remove the 2 screws
on the partition plate
(1).
5Remove the 2 screws
at the bottom left of the
front.
Step Procedure Points
(R11059)
Outdoor fan
Partition plate (1)
(R11060)
(R11061)

Si12-996 Removal of Outer Panels
Removal Procedure 7
6Remove the screw at
the bottom of the left
side.
7Remove the screw at
the bottom of the back
side.
8The front panel (1) is
provided with a hook on
its front. Lift the front
panel (1) off position to
remove it.
Step Procedure Points
(R11062)
(R11063)
Hook
(R18409)

Removal of Outer Panels Si12-996
8Removal Procedure
9Remove the front panel
(1).
6. Removal of the rear panel
1Remove the 2 screws
on the partition plate
(2).
2Lift up slightly and
remove the partition
plate (2).
3Remove the 2 screws
on the wire fixing plate.
Step Procedure Points
(R11065)
Partition plate (2)
(R11066)
(R11067)
Wire fixing plate

Si12-996 Removal of Outer Panels
Removal Procedure 9
4Remove the wire fixing
plate.
5Remove the 4 screws
on the rear panel.
6Remove the screw from
the bottom frame.
Step Procedure Points
(R11068)
(R11069)
(R11070)

Removal of Outer Panels Si12-996
10 Removal Procedure
7Remove the screw from
the stop valve mounting
plate.
Peel off a half of the
insulation material.
8Lift the rear panel
upward to release the 2
hooks.
9Push the hooks of the
outdoor temperature
thermistor holder from
inner-side.
Step Procedure Points
(R11071)
Insulation material
Stop valve
mounting
plate
(R11072)
Hooks
(R11073)

Si12-996 Removal of Outer Panels
Removal Procedure 11
10 The outdoor
temperature thermistor
holder is now released.
11 Remove the rear panel.
Step Procedure Points
Outdoor temperature thermistor holder
(R11074)
(R11075)
Rear panel

Removal of Fan Motor Si12-996
12 Removal Procedure
2. Removal of Fan Motor
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1Disconnect the
connector for fan motor
[S70] and release the
ferrite core attached to
the electrical box with
clamp.
When reassembling, insert
the clamp into the small
hole.
2The illustration shows
arrangement of the fan
motor lead wire.
Fix the ferrite core at where
the tension does not pull the
PCB ASSY when connecting
the connectors.
3 Cut the clamps at 2
locations.
[S70]
Ferrite core
(R11082)
(R11084)
Fan motor lead wire
(R9630)

Si12-996 Removal of Fan Motor
Removal Procedure 13
4
5
Remove the 2 screws
at the bottom first.
Next, remove the 2 top
screws.
Be sure to remove the
bottom screws first. If the top
screws are removed first, the
fan motor, the center of
gravity of which is toward the
front, may tilt down or fall,
getting you injured.
6 Remove the fan motor. When reassembling, be sure
to place the wire harness
lower.
Step Procedure Points
(R11076)
2
1
(R11077)
Fan motor
(R11078)
Harness

Removal of Electrical Box Si12-996
14 Removal Procedure
3. Removal of Electrical Box
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1 Remove the screw from
the stop valve mounting
plate.
2 Remove the 2 screws
to detach the earth
wires.
3 Remove the screw on
the partition plate.
(R11079)
Stop valve mounting plate
(R11081)
Earth wires
(R11080)
Partition plate

Si12-996 Removal of Electrical Box
Removal Procedure 15
4Disconnect the
connector for fan motor
[S70] and release the
ferrite core attached to
the electrical box with
clamp.
When reassembling, insert
the clamp into the hole.
5The illustration shows
arrangement of the fan
motor lead wire.
Fix the ferrite core at where
the tension does not pull the
PCB ASSY when connecting
the connectors.
6Disconnect the 4
connectors for
electronic expansion
valve coil and detach
the clamp.
[S20]: room A (blue)
[S21]: room B (yellow)
[S22]: room C (white)
[S23]: room D (red)
When reassembling, insert
the clamp into the hole.
7Disconnect the
connector for four way
valve coil [S80].
Step Procedure Points
[S70]
Ferrite core
(R11082)
(R11083)
Fixing position for ferrite
core of fan motor
(R11084)
Fan motor lead wire
[S20] [S21] [S22] [S23]
(R11085)
(R11086)
Fixing position for
electronic expansion valve
coil connectors
(R11087)
[S80]

Removal of Electrical Box Si12-996
16 Removal Procedure
8Disconnect the 2
connectors and detach
the 2 clamps.
[S92]: gas pipe
thermistor connector
[S93]: liquid pipe
thermistor connector
When reassembling, insert
the clamp into the hole.
9Disconnect the
connector for thermistor
[S90] and detach the
clamp.
[S90]: thermistor
connector (outdoor
temperature, outdoor
heat exchanger,
discharge pipe)
10 The wire harness is
hooked under the
electrical box.
Unhook it and pull out
the clamp.
11 The wire harness for
the compressor is
attached to the partition
plate (1) by the clamp.
Step Procedure Points
[S93][S92]
(R11088)
(R11089)
gas pipe
thermistor connector
liquid pipe
thermistor connector
thermistor
connector
[S90]
(R11090)
(R11091)
Hook
Clamp
When reassembling, insert
the clamp into the small
hole.
(R11092)
Clamp

Si12-996 Removal of Electrical Box
Removal Procedure 17
12 Pull out the clamp. Detach the clamp.
13 Disconnect the relay
connector of the
overload protector [OL]
and the compressor.
14 Slide the electrical box
leftward to release the
hook on the right side of
the box.
15 Lift up the electrical box
to remove it.
Step Procedure Points
(R9624)
Clamp
(R11093)
(R11094)
Electrical box
Hook
(R11095)

Removal of PCBs Si12-996
18 Removal Procedure
4. Removal of PCBs
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
Remove the electrical
box.
1. Removal of the PCB
1Turn over the insulation
sheet.
Peel off the filament
tape.
2Unhook the 4 hooks
and remove the
electrical box cover.
3Disconnect the
connectors [S52]
[S102] from the service
monitor PCB.
(R11096)
Insulation sheet
Filament type
(R11097)
Electrical box cover
[S102]
(R11098)
[S52]
Service
monitor
PCB