Daikin 3MWKS80LV1 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
80 kW Class
Outdoor Unit
Inverter
Multi Type
Si121557E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
3MWKS80LV1
zWater Heater
TUL-55KVM
TUL-75KVM
TUL-100KVM
TUR-55KVM
TUR-75KVM
TUR-100KVM

Si121557E
Removal Procedure 1
Table of Contents
1. Outdoor Unit............................................................................................2
1.1 Outer Panels / Outdoor Fan .....................................................................2
1.2 Fan Motor ...............................................................................................10
1.3 Electrical Box..........................................................................................12
1.4 PCBs ......................................................................................................18
1.5 Reactor...................................................................................................24
1.6 Coils / Thermistors .................................................................................25
1.7 Sound Blankets ......................................................................................27
1.8 Compressor............................................................................................29
2. Water Heater.........................................................................................31
Note: The illustrations may be slightly different depending on the model.

Outdoor Unit Si121557E
2Removal Procedure
1. Outdoor Unit
1.1 Outer Panels / Outdoor Fan
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. The hooks are secured in
the clearances of the
outdoor heat exchanger fins.
1
2
Unfasten the 5 hooks.
Remove the suction
grille.
2. Remove the top panel.
1
2
Remove the 8 screws.
Lift up the top panel and
remove it.
3. Remove the front panel
(2).
This screw is M5 × 16.
1 Remove the 5 screws.
(R17585)
Hook
Hook
Suction grille
(R22022)
Top panel
+
Front Panel (2)
Front
Panel (1)
(R13637)

Si121557E Outdoor Unit
Removal Procedure 3
2 Slide the front panel (2)
downward to release
the hook.
3 Remove the front panel
(2).
4. Remove the right side
panel.
1 Remove the 2 screws.
Step Procedure Points
(R21942)
Hook
(R13639)
Right side panel (R13640)

Outdoor Unit Si121557E
4Removal Procedure
2 Slide the right side
panel downward to
unfasten the 2 hooks on
the back side.
Step Procedure Points
(R13645)
Hook
(R6378)
Hook
(R13646)

Si121557E Outdoor Unit
Removal Procedure 5
5. Remove the outdoor fan
and the front panel (1).
Remove the discharge grille
and outdoor fan first to
remove the front panel (1).
1 Remove the 4 screws
on the discharge grille.
2
3
Slide the discharge
grille downward to
unfasten the 2 hooks at
the top.
Remove the discharge
grille.
4 Remove 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
(R13641)
Discharge grille
Front
Panel (1)
(R21943)
Hook
(R13644)
Outdoor fan
13 mm
(0.51 inch)
(R18965)

Outdoor Unit Si121557E
6Removal Procedure
5 Remove the 5 screws
on the front panel (1).
6 Release the hook and
remove the front panel
(1).
6. Remove the rear panel.
1 Remove the screw on
the partition plate (2)
and remove the
partition plate (2).
Step Procedure Points
(R18785)
(R17716)
(R13650)
Partition
plate (2)
Rear panel

Si121557E Outdoor Unit
Removal Procedure 7
2 Remove the 5 screws
and remove the wire
fixture.
3 Disconnect the
connecting wires.
4 Disconnect the
connector [S402].
[S402]: water heater thermistor
Step Procedure Points
(R21944)
Wire fixture
(R13652)
[S402]
(R22025)

Outdoor Unit Si121557E
8Removal Procedure
5 Remove the screw of
the resin clamp.
When reassembling, attach
the resin clamp as below.
6 Remove the water
heater thermistor.
7 Pull out the holder of
the outdoor
temperature thermistor.
The holder is secured in the
clearances of the outdoor
heat exchanger fins.
Step Procedure Points
(R13654)
Resin
clamp
<Correct>
<Wrong>
(R22023)
(R15740)
Water
heater
thermistor
(R10388)
Outdoor temperature thermistor

Si121557E Outdoor Unit
Removal Procedure 9
8 Release the thermistor
wire from the groove.
9 Remove the 5 screws.
10
11
Lift the rear panel
upward to unfasten the
2 hooks.
Remove the rear panel.
Step Procedure Points
Groove
(R10389)
Rear panel
(R21945)
(R21946)

Outdoor Unit Si121557E
10 Removal Procedure
1.2 Fan Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Cut the 2 clamps.
2 Disconnect the
connector [S70].
[S70]: fan motor
3 Release the fan motor
lead wire from the 5
hooks.
★: When reassembling, do not
use these 2 hooks.
Clamp
(R13661)
[S70]
(R13662)
(R13663)
Fan motor
lead wire
+

Si121557E Outdoor Unit
Removal Procedure 11
4
5
Remove the 2 lower
screws of the fan motor.
Remove the 2 upper
screws.
Be sure to remove the lower
screws first. If the upper
screws are removed first, the
fan motor may tilt or fall
because its centre of gravity
shifts to the front.
It may cause injuries.
6 Remove the fan motor. When reassembling, make
sure that the wire harness is
facing downward.
Step Procedure Points
2
1
(R13664)
Fan motor
(R13665)
(R6444)
Harness

Outdoor Unit Si121557E
12 Removal Procedure
1.3 Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Disconnect the
connector [S70].
[S70]: fan motor
2 Release the fan motor
lead wire from the 5
hooks.
★: When reassembling, do not
use these 2 hooks.
3 Disconnect the
connectors for the
electronic expansion
valve coils [S20], [S21],
[S22].
Pull out the clamp.
[S20] (white): room A
[S21] (red) : room B
[S22] (blue) : room C
When reassembling, insert
the clamps into the small
holes as below.
[S70]
(R13662)
(R13663)
Fan motor
lead wire
+
[S20] [S21] [S22]
(R15741)
Clamp
(R13762)
Electronic expansion
valve coils
Gas pipe thermistors
Thermistor
ASSY
Overload protector
and high pressure
switch

Si121557E Outdoor Unit
Removal Procedure 13
4 Disconnect the
connector [S80].
Pull out the clamp.
[S80]: four way valve coil
5 Disconnect the
connector [S92].
Pull out the clamp.
[S92]: gas pipe thermistors
(each room, water heater)
6 Disconnect the
connector [S90].
Pull out the clamp.
[S90]: thermistor ASSY
Step Procedure Points
Clamp
[S80]
(R13667)
[S92] Clamp
(R13668)
[S90]
Clamp
(R13669)

Outdoor Unit Si121557E
14 Removal Procedure
7 Release the harnesses
of the thermistor ASSY
from the hook on the
bottom of the electrical
box.
Pull out the clamp.
8 Disconnect the
connector [S40].
Pull out the clamp.
[S40]: overload protector / high
pressure switch
9 Disconnect the relay
connector for the
compressor.
10 Pinch the clamp with
pliers and pull out the
clamp.
Step Procedure Points
Hook
Clamp (R13670)
(R13671)
[S40] Clamp
(R13672)
Clamp (R13673)

Si121557E Outdoor Unit
Removal Procedure 15
11 Remove the screw on
the stop valve mounting
plate.
12 Remove the screw on
the partition plate (1).
13 Remove the 2 screws
to detach the earth /
ground wires.
Step Procedure Points
Stop valve
mounting plate
(R13674)
Partition plate (1) (R13675)
(R13676)

Outdoor Unit Si121557E
16 Removal Procedure
14 Cut the clamp.
15 Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
Step Procedure Points
(R13677)
(R13678)
Outdoor heat exchanger
thermistor
Clip
(R13763)

Si121557E Outdoor Unit
Removal Procedure 17
16 Release the discharge
pipe thermistor under
the sound blanket (top
upper).
Be careful not to lose the clip
for the thermistor.
17 Lift up the electrical box
and remove it.
Step Procedure Points
(R13679)
Sound blanket
(top upper)
Discharge pipe thermistor
(R13764)
Clip
Electrical box
(R13680)

Outdoor Unit Si121557E
18 Removal Procedure
1.4 PCBs
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.
1 Peel off the filament
tape.
2 Unfasten the 4 hooks
and remove the
electrical box cover.
The hooks are marked with
▼.
2. Remove the filter PCB. [S401]: to main PCB
1 Disconnect the
connector [S401].
Filament tape
(R13681)
Hook
Hook
(R13682)
(R6427)
123
123123
A
LN
POWER
SUPPLY
BC
[S401] (R13683)