Daikin 4MKS80ESG User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Multi Type
8.0/9.0/10.0 kW Class
Si121292EC

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
4MKS80ESG 4MXS80KVM
4MXS100KVM
4MKS80FSG
4MXS80LVMA
4MKS80KVM 4MXS80LVMA9
4MKS100KVM
4MXS80E3V3B
4MKS80LVMA 5MXS90E3V3B
4MKS80LVMA9

Si121292EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Electrical Box ..........................................................................................6
3. PCBs .....................................................................................................11
4. Fan Motor..............................................................................................14
5. Coils / Thermistors ................................................................................15
6. Sound Blankets .....................................................................................18
7. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si121292EC
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 suction grille.
1
2
Unfasten the 5 hooks.
Remove the suction
grille.
2. Remove the top panel.
1
2
Remove the 8 screws.
Lift the top panel and
remove it.
3. Remove the right side
panel.
1Remove the 5 screws.
(R17585)
Hook
Hook
Suction grille
(R18781)
Top panel
(R17071)
Right side panel

Si121292EC Outer Panels
Removal Procedure 3
2Remove the right side
panel.
Slide the right side panel
downward to unfasten the 2
hooks on the rear side.
4. Remove the front panel
(2).
+: This screw is M5(3) × 16
Slide the front panel (2)
downward to unfasten the
hook.
1Remove the 2 screws
and remove the front
panel (2).
5. Remove the front panel
(1).
Remove the discharge grille
and the outdoor fan before
removing the front panel (1).
1
2
Remove the 4 screws
on the discharge grille.
Unfasten the 2 hooks at
the top and remove the
discharge grille.
Step Procedure Points
(R18911)
Hook
Front Panel (2)
+
Hook
(R18782)
(R18784)
Discharge grille
Front
Panel (1)
Hook

Outer Panels Si121292EC
4Removal Procedure
3Remove 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.
4Remove the 5 screws.
5Release the hook and
remove the front panel
(1).
6. Remove the rear panel. Disconnect the connecting
wires and power supply
wires.
1Remove the screw on
the partition plate (2).
2Slide the partition plate
(2) to the left and
remove it.
Step Procedure Points
Outdoor fan
(R16736)
13 mm
(0.51 inch)
(R18965)
(R18785)
(R17716)
(R17801)
Rear panel
Partition plate (2)
LN
Room A Room B Power supply
Room C Room D
44
44
4P
(R17903)

Si121292EC Outer Panels
Removal Procedure 5
3Remove the 5 screws
on the wire fixture
(upper).
4Remove the wire fixture
(upper).
5Remove the 3 screws
on the wire fixture
(lower).
6Remove the wire fixture
(lower).
7Release the holder and
harness of the outdoor
temperature thermistor.
8Remove the 5 screws.
9Unfasten the 2 hooks
and remove the rear
panel.
Step Procedure Points
(R17902)
Wire fixture
(upper)
(R17936)
Wire fixture
(lower)
Holder
(R17717)
Outdoor
temperature
thermistor
Hook
(R17718)

Electrical Box Si121292EC
6Removal Procedure
2. 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 2 screws
to detach the earth /
ground wires.
2Disconnect the
connector [S70].
[S70]: fan motor
3Release the fan motor
lead wire from the 5
hooks.
+: When reassembling, do not
use these 2 hooks.
(R20764)
Earth /
ground
wire
[S70]
(R10397)
(R17268)
Fan motor lead wire
+

Si121292EC Electrical Box
Removal Procedure 7
4Disconnect the
connector [S80] and
pull out the clamp.
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
5Disconnect the 4
connectors for the
electronic expansion
valve coil and pull out
the clamp.
[S20] (white): room A
[S21] (red): room B
[S22] (blue): room C
[S23] (yellow): room D
5-room models also have
[S24] (green) for room E.
When reassembling, insert
each clamp into the hole.
6Disconnect the
connector [S93] and
pull out the clamp.
[S93]: liquid pipe thermistor
Step Procedure Points
[S80]
Clamp
(R11187)
[S20] [S21] [S22] [S23]
Clamp
(R20765)
For the electronic
expansion valve coil
For [S93]
(R17904)
Clamp
[S93]
(R10400)

Electrical Box Si121292EC
8Removal Procedure
7Disconnect the
connector [S92] and
pull out the clamp.
[S92]: gas pipe thermistor
When reassembling, insert
the clamp into the hole.
8Disconnect the
connector [S90] and
pull out the clamp.
[S90]: thermistor ASSY
When reassembling, insert
the clamp into the hole.
9
10
Release the thermistor
harness from the hook
at the bottom of
electrical box.
Pull out the clamp of the
thermistor harness from
the hole of the electrical
box.
Step Procedure Points
[S92]
(R10537)
Clamp
For [S92]
(R17905)
[S90]
Clamp
(R10538)
For thermistor ASSY
(R17906)
Clamp
Hook
(R6420)
Fixing position for the
thermistor harness
When reassembling, insert
the clamp into the hole.