Daikin 5MKS90E7V3B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Multi Type
8.0/9.0/10.0 kW Class
Si12-794

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
5MKS90E7V3B 4MXS80E7V3B
5MXS90E7V3B
4MKS80ESG
3MXS90EVLT
3MKS90EVLT 4MXS100EVLT
4MKS100EVLT
4MXS80EVMA
4MKS90EVMA

Si12-794
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Electrical Box .....................................................................16
3. Removal of PCBs..................................................................................22
4. Removal of Fan Motor...........................................................................26
5. Removal of Coils / Thermistors .............................................................27
6. Removal of Sound Blankets..................................................................32
7. Removal of Compressor .......................................................................35
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Removal of Outer Panels Si12-794
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
Appearance features
1. Remove the suction grille. The hooks are secured in
the clearances of the
outdoor heat exchanger fins.
1Unfasten the 2 hooks at
the bottom first.
(
R6368
)
Hook
Rear side
(R14612)
Suction grille
(R6370)

Si12-794 Removal of Outer Panels
Removal Procedure 3
2Slide the suction grille
downward to unfasten
the 3 top hooks.
3Remove the suction
grille.
2. Remove the top panel.
1Remove the 4 screws
on the back and the
screw on the left side
panel.
Step Procedure Points
Hook
(
R14613
)
(R6372)
Top panel
Left side panel
(R6373)

Removal of Outer Panels Si12-794
4Removal Procedure
2Remove the 2 screws
on the front and the
screw on the right side
panel.
3Lift the top panel and
remove it.
3. Remove the right side
panel.
1Remove the 5 screws.
Step Procedure Points
(R6374)
Right side
panel
(R6375)
(R6376)
Right side panel

Si12-794 Removal of Outer Panels
Removal Procedure 5
2Slide the right side
panel downward to
unfasten the 2 hooks on
the back side.
Step Procedure Points
(R6377)
Hook
(R14614)
Hook
(R14615)

Removal of Outer Panels Si12-794
6Removal Procedure
3Remove the right side
panel.
4. Remove the front panel
(2). This screw is M5 × 16
1Remove the 2 screws.
2Slide the front panel (2)
downward to unfasten
the hook.
Step Procedure Points
(R10441)
(R10629)
+
+
Front Panel (2)
Front
Panel (1)
(R10374)

Si12-794 Removal of Outer Panels
Removal Procedure 7
3Remove the front panel
(2).
5. Remove 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.
Step Procedure Points
(R6383)
(R10375)
(R10376)
Front
Panel (1)
Discharge grille
(R10377)

Removal of Outer Panels Si12-794
8Removal Procedure
3Slide the discharge
grille downward to
unfasten the 2 hooks at
the top.
4Remove the discharge
grille.
5Remove the nut and
remove the outdoor fan.
Nut size : M8
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
Step Procedure Points
(R17173)
Hook
(R10380)
(R10381)
Outdoor fan
13 mm
(R12301)

Si12-794 Removal of Outer Panels
Removal Procedure 9
6Remove the 2 screws
on the partition plate
(1).
7Remove the screw at
the bottom left of the
front panel (1).
8Remove the screw at
the bottom of the left
side.
Step Procedure Points
(R10382)
Partition plate (1)
(R10383)
(R6393)

Removal of Outer Panels Si12-794
10 Removal Procedure
9Remove the screw at
the bottom of the back
side.
10 The front panel (1) has
a hook. Lift the front
panel (1).
11 Remove the front panel
(1).
Be sure to detach the front
panel (1) carefully so as not
to deform it.
Step Procedure Points
(R6394)
(R17174)
Hook
(R10385)
(R6396)

Si12-794 Removal of Outer Panels
Removal Procedure 11
6. Remove the rear panel.
1Remove the screw on
the partition plate (2).
2Slide the partition plate
(2) to the left and
remove it.
Step Procedure Points
(R11209)
Rear panel
Partition plate (2)
(R11211)

Removal of Outer Panels Si12-794
12 Removal Procedure
3Remove the 5 screws
on the wire fixing plate
(upper).
4Remove the wire fixing
plate (upper).
5Remove the 3 screws
on the wire fixing plate
(lower).
Step Procedure Points
(R11210)
Wire fixing
plate (upper)
(R11213)
(R11214)
Wire fixing
plate (lower)

Si12-794 Removal of Outer Panels
Removal Procedure 13
6Remove the wire fixing
plate (lower).
7Pull out the holder of
the outdoor
temperature thermistor.
The holder is secured in the
clearances of the outdoor
heat exchanger fins.
8Release the thermistor
wire from the groove
Step Procedure Points
(R11215)
(R10388)
Outdoor temperature thermistor
Groove
(R10389)

Removal of Outer Panels Si12-794
14 Removal Procedure
9Remove the 3 screws
on the rear panel.
10 Remove the screw on
the bottom frame.
11 Remove the screw on
the stop valve mounting
plate.
Step Procedure Points
(R10390)
(R10391)
(R10392)
Stop valve
mounting
plate

Si12-794 Removal of Outer Panels
Removal Procedure 15
12 Lift the rear panel
upward to unfasten the
2 hooks.
13 Remove the rear panel.
Step Procedure Points
HookHook
(R12918)
(R10394)

Removal of Electrical Box Si12-794
16 Removal Procedure
2. Removal of 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
1Remove the 2 screws
to detach the earth
wires.
2Disconnect the
connector for the fan
motor [S70].
3Release the fan motor
lead wire.
+: When reassembling, do not
use these 2 hooks.
(R10396)
[S70]
(R10397)
(R17268)
Fan motor lead wire
+

Si12-794 Removal of Electrical Box
Removal Procedure 17
4Disconnect the
connector for the four
way valve coil [S80].
The cooling only models do
not have the harness for
[S80].
Pull out the clamp.
5Disconnect the
connectors for the
electronic expansion
valve coil.
[S20] (white): room A
[S21] (red): room B
[S22] (blue): room C
[S23] (yellow): room D
Pull out the clamp.
The 3-room models have no
harness for [S23].
The 5-room models have
[S24] (green) for room E.
When reassembling, insert
each clamp into the small
hole.
6Disconnect the
connector for the liquid
pipe thermistor [S93].
Pull out the clamp.
Step Procedure Points
[S80]
Clamp
(R11187)
ABCD
Clamp
(R11188)
For the electronic
expansion valve coil
[S93]
(R17266)
Clamp
[S93]
(R10400)

Removal of Electrical Box Si12-794
18 Removal Procedure
7Disconnect the
connector for the gas
pipe thermistor [S92].
Pull out the clamp.
When reassembling, insert
the clamp into the small
hole.
8Disconnect the
connector for the
thermistors [S90].
Pull out the clamp.
When reassembling, insert
the clamp of the thermistor
ASSY into the hole as
below.
9The wire harness of the
thermistor is hooked
under the electrical box.
Unhook it and pull out
the clamp.
Step Procedure Points
[S92]
(R10537)
Clamp
[S92]
(R17267)
[S90]
Clamp
(R10538)
Thermistor ASSY
(R17142)
Clamp
Hook
(R6420)
Fixing position for the
thermistor harness
When reassembling, insert
the clamp into the small hole.