Daikin 2AMK40FV1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
4.0/5.0 kW Class
Outdoor Unit
Inverter
Multi Type
Si12-891

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
2AMK40FV1B 2AMX40F2V1B
2AMK50FV1B 2AMX50F2V1B
2AMX40FV1B
2MKS40FV1B 2AMX50FV1B
2MKS50FV1B
2MXS40FV1B
2MKS40G2V1B 2MXS50FV1B
2MKS50G2V1B
2MKS40GV1B 2MXS40G2V1B
2MKS50GV1B 2MXS50G2V1B
2MXS40GV1B
2MXS50GV1B
2MXS50GVLT

Si12-891
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Electrical Box .......................................................................4
3. Removal of PCB......................................................................................9
4. Removal of Sound Blankets..................................................................14
5. Removal of Outdoor Fan / Fan Motor ...................................................16
6. Removal of Thermistors ........................................................................19
7. Removal of Four Way Valve / Outdoor Electronic Expansion Valves ...21
8. Removal of Compressor .......................................................................24
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Removal of Outer Panels Si12-891
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
1External appearance
2Remove the 2 screws
and remove the top
panel.
The front panel has 4 hooks.
3Remove the 8 screws
and remove the front
panel.
(R7570)
Room A
Room B
}
Liquid side
Gas side
(R7571)
(R12527)
Top panel
Hooks
Discharge grille Front panel
Hooks

Si12-891 Removal of Outer Panels
Removal Procedure 3
4Remove the 4 screws
and remove the
discharge grille.
When reassembling, make
sure to fit the 4 hooks.
5Remove the 2 screws
and remove the stop
valve cover.
When reassembling, make
sure to fit the 4 hooks.
Step Procedure Points
(R12767)
(R7699)
Stop
valve
cover
(R7701)

Removal of Electrical Box Si12-891
4Removal 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
1. Disconnect the
connecting wires.
When reassembling, fasten
the wires with screws on the
terminal board.
1Remove the 2 screws
of earth wires.
Remove the 2 screws
and remove the wiring
fixture.
Then remove all the
screws to disconnect
the power supply
cables and the
connecting wires.
2. Remove the electrical
box.
1Release the outdoor
temperature thermistor.
2Lift up the guard net
and remove it.
44P
Room A Room B
Power supply
(R7573)
Screw of
earth wire
Wiring
fixture
(R7208)
Outdoor temperature thermistor
Guard net
(R7209)

Si12-891 Removal of Electrical Box
Removal Procedure 5
3Disconnect the
connector for the fan
motor [S70].
4Release the fan motor
lead wire.
5Disconnect the
connector for the gas
pipe thermistor [S91]
and for the liquid pipe
thermistor [S92].
[S91]: gas pipe thermistor
(white)
[S92]: liquid pipe thermistor
(red)
6Disconnect the
connector for the
overload protector
[S40].
[S40]: overload protector
Step Procedure Points
[S70]
(R12529)
(R7579)
[S92] [S91]
(R12530)
[S40]
(R12531)

Removal of Electrical Box Si12-891
6Removal Procedure
7Disconnect the
connectors [S20],
[S21], [S80].
The cooling only models do
not have the harness for
[S80].
[S20]: outdoor electronic
expansion valve coil for
room A (white)
[S21]: outdoor electronic
expansion valve coil for
room B (red)
[S80]: four way valve coil
8Pull out the clamp from
the electrical box.
The clamp is push-mount
type.
9Disconnect the relay
connector for the
compressor.
10 Disconnect the 2
connectors for the
reactor.
Step Procedure Points
[S20] [S21] [S80]
(R12532)
(R7583)
(R12533)
(R12534)

Si12-891 Removal of Electrical Box
Removal Procedure 7
11 Release the discharge
pipe thermistor.
Meet the edge of the
thermistor and the clip.
Be careful not to lose the clip
for the thermistor.
12 Disconnect the
connector for the
thermistors [S90].
[S90]: thermistors (outdoor
temperature, outdoor
heat exchanger,
discharge pipe)
13 Detach the clamp for
the thermistors from the
electrical box.
14 Remove the screw on
the right side of the
electrical box.
Step Procedure Points
Discharge pipe thermistor
(R12535)
[S90]
(R7587)
Clamp
(R12771)
(R12536)

Removal of Electrical Box Si12-891
8Removal Procedure
15 Loosen the screw in
front of the electrical
box.
16 Lift and remove the
electrical box.
Step Procedure Points
(R7590)
(R12537)

Si12-891 Removal of PCB
Removal Procedure 9
3. Removal of PCB
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 screw and
remove the electrical
box cover.
Preparation
Remove the panels
according to the “Removal of
Outer Panels”.
Remove the electrical box
according to the “Removal of
Electrical Box”.
2Detach the insulation
sheet.
The trimmed part goes front.
3Remove the 2 screws
and remove the
terminal boards.
The thermal fuse is united
with terminal board.
(R12538)
Electrical box cover
M4 × 12
(R12539)
(R12772)
Insulation
sheet
Terminal
board

Removal of PCB Si12-891
10 Removal Procedure
4Release the earth wire
from the hook.
5Remove the 2 screws
and detach the clip to
remove the radiation
shield plate.
Step Procedure Points
(R12541)
Temperature fuse harness
Radiation shield plate Clip (R7600)
Clip
Hole
(R7596)
Compressor
harness
(R12565)

Si12-891 Removal of PCB
Removal Procedure 11
6Cut the clamp and
release the wire
harnesses.
7Remove the 7 screws in
total to remove the
PCB.
8Lift up the back side of
the electrical box
slightly and unfasten
the hooks of the front.
When reassembling, make
sure that the hooks of the
electrical box are placed on
the PCB.
Step Procedure Points
(R7597)
(R7598)
(R7602)
(R7603)

Removal of PCB Si12-891
12 Removal Procedure
9Release the lead wires
from the hooks and
remove the terminal
boards.
10 Lift up the PCB.
11 Remove the PCB.
Step Procedure Points
Terminal board
(R7604)
(R7605)
(R7606)

Si12-891 Removal of PCB
Removal Procedure 13
12 Disconnect the
connectors from the
terminal board.
[S20]: outdoor electronic
expansion valve coil for
room A
[S21]: outdoor electronic
expansion valve coil for
room B
[S40]: overload protector
[S70]: fan motor
[S80]: four way valve coil
[S90]: thermistors
[S91]: gas pipe thermistor
[S92]: liquid pipe thermistor
13 Remove the 2 screws
and remove the
radiation fin.
Step Procedure Points
[S70] [S40] [S92] [S91] [S20] [S21]
[S90] [S80]
(R12566)
(R7608)
(R7609)

Removal of Sound Blankets Si12-891
14 Removal Procedure
4. Removal of Sound Blankets
Procedure 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 right side
panel.
Preparation
Remove the panels
according to the “Removal of
Outer Panels”.
Remove the electrical box
according to the “Removal of
Electrical Box”.
1Remove the 6 screws
and remove the right
side panel.
2. Remove the partition
plate.
When reassembling, fit the
lower hooks into the bottom
frame.
1Remove the 2 screws.
2The partition plate has
2 hooks on the lower
side. Lift and pull the
partition plate and
remove it.
(R12567)
Right side
panel
(R7611)
Partition plate
(R7612)
Remove the screw to
remove the reactor.

Si12-891 Removal of Sound Blankets
Removal Procedure 15
3. Remove the sound
blankets.
1Release the strings,
open the sound blanket
(outer) and pull it out.
2Remove the sound
blanket (top).
Since the piping ports are
torn easily, remove the
sound blanket carefully.
3Open the sound blanket
(inner) and pull it out.
4Pull out the sound
blanket (bottom).
Step Procedure Points
(R7613)
Sound blanket (outer)
(R7614)
Sound blanket (top)
(R7617)
(R7615)
Sound blanket (inner)
(R7616)
Sound blanket (bottom)

Removal of Outdoor Fan / Fan Motor Si12-891
16 Removal Procedure
5. Removal of Outdoor Fan / Fan Motor
Procedure 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 outdoor fan. Nut size: M6
1Remove the washer
fitted nut.
2Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
2. Remove the fan motor.
1Disconnect the
connector for the fan
motor [S70].
(R7618)
10 mm
(R12236)
(R7619)
(R7620)
[S70]
(R7621)

Si12-891 Removal of Outdoor Fan / Fan Motor
Removal Procedure 17
2Release the fan motor
lead wire.
3Remove the screw of
the fan motor fixing
frame.
4Remove the fan motor
fixing frame.
Step Procedure Points
(R7579)
(R7623)
Fan motor
fixing frame
(R7624)
(R7625)

Removal of Outdoor Fan / Fan Motor Si12-891
18 Removal Procedure
5Turn the fan motor
fixing frame backward
and open the 2 hooks of
the fan motor lead wire.
6Release the fan motor
lead wire.
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.
7Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
(R7626)
(R7627)
Lead wire Outdoor fan
(R12215)
(R7628)
(R12773)