Daikin MKM24PV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
5.6/6.2/6.5/7.5/8.0/9.0 kW Class
24000/28000 Btu/h Class
Outdoor Unit
Inverter / Hybrid
Multi Type
Si121561E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
MKM24PV2S 2MXM56PVLT
MKM28PV2S 2MXM75PVLT
MKM65PV14 3MXM90PVLT
MKM80PV14
MKM65PV1G
MKM80PV1G
MV62PV1G

Si121561E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Rear Plate ASSY / Electrical Box............................................................6
4. PCBs .....................................................................................................11
5. Partition Plate / Sound Blankets............................................................15
6. Electronic Expansion Valve Coil ASSY / Thermistor ASSYs ................18
7. Four Way Valve.....................................................................................21
8. Compressor...........................................................................................23
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si121561E
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 6 screws
and remove the top
panel.
2 Remove the 5 screws
of the right side panel.
The right side panel can be
removed without removing
the top panel.
3
4
Slide the right side
panel downward to
unfasten the 2 hooks on
the left of the right side
panel.
Unfasten the 2 hooks at
the back and remove
the right side panel.
When reassembling, make
sure that the 4 hooks are
securely fastened.
Top panel
(R22446)
Right side panel
(R22447)
Hook
(R22448)

Si121561E Outer Panels
Removal Procedure 3
5 Remove the 6 screws
of the front panel.
6
7
Unfasten the 3 hooks
on the left side.
Remove the front panel.
When reassembling, make
sure that the 3 hooks are
securely fastened.
8 Remove the 4 screws
of the discharge grille.
9 Unfasten the 5 hooks
and remove the
discharge grille.
Step Procedure Points
Front panel (R22449)
Hook
(R22450)
Discharge grille
(R22451)
Hook
Hook
(R22452)

Outdoor Fan / Fan Motor Si121561E
4Removal Procedure
2. Outdoor Fan / 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 Remove the drip proof
cover.
2 Disconnect the
connector [S70].
[S70]: fan motor
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.
3 Release the fan motor
lead wire from the slit
and the groove.
Drip proof cover
(R22453)
[S70]
(R22454)
Lead wire Outdoor fan
(R3249)
SlitGroove
Fan motor
lead wire
(R22455)

Si121561E Outdoor Fan / Fan Motor
Removal Procedure 5
4 Remove the nut and
remove the outdoor fan.
Nut size : M8
When reassembling, align
the mark of the fan rotor
with the D-cut section of the
motor shaft.
5 Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
6 Unfasten the 3 hooks
on the fan motor fixing
frame and release the
fan motor lead wire.
7 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
D-cut
Nut
Outdoor fan
(R22456)
13 mm
(0.51 inch)
(R18965)
Fan motor fixing frame
(R22457)
Hook (R22212)
Hook
Fan motor lead wire
(R22458)
Fan motor
(R22459)

Rear Plate ASSY / Electrical Box Si121561E
6Removal Procedure
3. Rear Plate ASSY / 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. Remove the rear plate
ASSY.
1
2
Remove the 15 screws
on the 4 terminal
boards and disconnect
the 3 connecting wires
(Room A, B, C) and
power supply wire.
Remove the 2 screws
and remove the wire
fixture together with the
3 connecting wires
(Room A, B, C) and
power supply wire.
3
4
Remove the 2 screws.
Tilt the partition plate
(2) upward and pull
forward to unfasten the
2 hooks and remove it.
When reassembling, make
sure that the 2 hooks are
securely fastened.
5
6
Release the outdoor
temperature thermistor
from the slit.
Remove the 5 screws
of the rear plate ASSY.
Terminal board
Power supply
wire
Wire fixture
Connecting wire
(Room C)
Connecting wire
(Room A)
Connecting wire
(Room B)
(R22460)
Partition
plate (2)
(R22461)
Hook (R22462)
Slit
Rear plate ASSY
Outdoor
temperature
thermistor
(R22463)
The number of the terminal
boards varies depending on
the models.

Si121561E Rear Plate ASSY / Electrical Box
Removal Procedure 7
7 Unfasten the 2 hooks
and remove the rear
plate ASSY.
When reassembling, make
sure that the 2 hooks are
securely fastened.
2. Remove the electrical
box.
Be careful not to lose the clip
for the thermistor.
When reassembling, insert
the thermistor harness
through the heat exchanger
pipes.
1 Cut the clamp and pull
out the outdoor heat
exchanger thermistor.
2 Disconnect the
connector [S80] and
pull out the clamp.
[S80]: four way valve
Cooling only models have no
harness for [S80].
Step Procedure Points
Hook
Rear plate ASSY
(R22464)
Clamp
Outdoor heat exchanger thermistor (R22465)
Clip
(R3264)
[S80] Clamp
(R22466)

Rear Plate ASSY / Electrical Box Si121561E
8Removal Procedure
3 Disconnect the
connector [S92] and 3
connectors for
electronic expansion
valve coil.
[S20] (white): room A
[S21] (red): room B
[S22] (blue): room C
[S92]: gas pipe thermistor
The 2-room models do not
have [S22].
The 4-room models have
[S23] (yellow) for room D.
4 Disconnect the
connector [S93].
[S93]: liquid pipe thermistor
5 Disconnect the
connector [S40].
[S40]: overload protector
When reassembling,
connect the connectors in
the reverse order.
Step Procedure Points
[S20]
[S21]
[S22] [S92]
(R22467)
[S93]
(R22468)
[S40]
(R22469)

Si121561E Rear Plate ASSY / Electrical Box
Removal Procedure 9
6 Disconnect the relay
connector for
compressor.
7 Pull out the 2 clamps.
8 Open the sound blanket
(top outer) and detach
the discharge pipe
thermistor.
Be careful not to lose the
fixture for the thermistor.
Step Procedure Points
Relay connector (R22470)
Clamp (R22471)
Discharge pipe thermistor
Sound blanket (top outer)
(R22472)
Fixture
(R22559)

Rear Plate ASSY / Electrical Box Si121561E
10 Removal Procedure
9 Remove the 2 screws.
10 Remove the electrical
box.
Step Procedure Points
(R22473)
Electrical box
(R22474)

Si121561E PCBs
Removal Procedure 11
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 service
monitor PCB.
1 Remove the screw of
the service monitor
PCB cover.
2 Unfasten the 3 hooks
and remove the service
monitor PCB cover.
When reassembling, make
sure that the 3 hooks are
securely fastened.
3 Disconnect the 2
connectors [S501] and
[S502] from the service
monitor PCB.
[S501], [S502]: to main PCB
Service monitor PCB cover
(R22475)
Hook
(R22476)
Service monitor PCB
[S501] [S502]
(R22477)

PCBs Si121561E
12 Removal Procedure
4 Cut the clamp.
5 Unfasten the 4
projections and remove
the service monitor
PCB.
2. Remove the terminal
board mounting plate.
1 Remove the earth /
ground screw.
Step Procedure Points
Clamp
(R22478)
Projection
Projection
Service
monitor PCB
(R22479)
Earth / ground
screw
(R22480)

Si121561E PCBs
Removal Procedure 13
2 Pull out the 4 clamps.
3 Disconnect the
connector [S90] and the
3 terminals for power
supply.
[S90]: thermistors
[HL1], [HN1], [S]: to terminal
board
4 Remove the 4 screws
of the terminal board
mounting plate.
Step Procedure Points
Bottom view
Clamp
Clamp (R22481)
[S90]
[S]
[HL1] [HN1] (R22482)
Terminal board
mounting plate
(R22483)

PCBs Si121561E
14 Removal Procedure
5 Slide the terminal board
mounting plate up to
unfasten the hook and
remove it.
When reassembling, make
sure to fasten the hook with
the notch.
3. Remove the main PCB.
1
2
Remove the 9 screws.
Unfasten the 3 hooks
and remove the main
PCB.
Step Procedure Points
Hook
Terminal board
mounting plate
(R22484)
Hook (R22485)
Main PCB
(R22486)

Si121561E Partition Plate / Sound Blankets
Removal Procedure 15
5. Partition Plate / Sound Blankets
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 partition
plate.
When reassembling, fit the
lower hook into the bottom
frame.
1
2
Remove the 2 screws.
Lift up the partition plate
and remove it.
2. Remove the sound
blankets.
1 Remove the sound
blanket (top outer).
2 Release the 2 Velcro
tapes (front) and the
Velcro tape (right) on
sound blanket (outer).
Partition plate (R22487) Hook
(R22488)
Sound blanket
(top outer)
(R22489)
Front Right
Sound blanket
(outer)
Velcro tape
(right)
Velcro tape
(front)
(R22490)

Partition Plate / Sound Blankets Si121561E
16 Removal Procedure
3 Remove the sound
blanket (outer).
Since the piping ports are
torn easily, remove the
sound blanket carefully.
4 Remove the sound
blanket (top inner (1)).
When reassembling, put the
sound blanket (top inner (1))
and sound blanket (top inner
(2)) as the position below.
5 Remove the sound
blanket (top inner (2)).
Some models do not have
the sound blanket (top inner
(2)).
Step Procedure Points
Sound blanket (outer) (R22491)
Sound blanket
(top inner (1))
(R22492) Sound blanket (top inner (1))
Sound blanket (top inner (2))
(R22493)
Sound blanket
(top inner (2))
(R22494)

Si121561E Partition Plate / Sound Blankets
Removal Procedure 17
6 Remove the sound
blanket (inner).
7 Remove the sound
blanket (bottom).
Some models do not have
the sound blanket (bottom).
Step Procedure Points
Sound blanket (inner) (R22495)
Sound blanket (bottom)
(R22496)

Electronic Expansion Valve Coil ASSY / Thermistor ASSYs Si121561E
18 Removal Procedure
6. Electronic Expansion Valve Coil ASSY /
Thermistor ASSYs
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by
the gas brazing machine.
If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is
exposed to flames, toxic gas may be generated.)
Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet
cloth so as to extinguish fire immediately.
Caution From the viewpoint of global environment protection, do not discharge the refrigerant
gas in the atmosphere. Make sure to collect all the refrigerant gas.
Restore the piping by non-oxidation brazing.
Note Before working, make sure that the refrigerant gas is empty in the circuit.
Be sure to apply nitrogen replacement when heating up the brazed part.
Do not use a metal saw for cutting pipes by all means because the sawdust comes into
the circuit.
When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes
may get deformed.
Provide a protective sheet or a steel plate so that the brazing flame cannot influence
peripheries.
Be careful so as not to burn the compressor terminals, the name plate, the outdoor
heat exchanger fin.
In case of difficulty with gas brazing machine
1. Disconnect the brazed part where is easy to disconnect and restore.
2. Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect.
Step Procedure Points
1. Remove the electronic
expansion valve coil
ASSY.
1 Cut the heat resistant
clamp and pull out the
clamp. Clamp
Heat resistant clamp
(R22497)