Daikin 2AMX40G3V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
4.0/5.0 kW Class
Outdoor Unit
Inverter
Multi Type
Si121295

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
2AMX40G3V1B
2AMX50G3V1B
2MXS40H3V1B
2MXS50H3V1B

Si121295
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................3
3. Electrical Box ..........................................................................................5
4. PCB.........................................................................................................9
5. Sound Blankets .....................................................................................12
6. Thermistors ...........................................................................................14
7. Four Way Valve / Outdoor Electronic Expansion Valves ......................16
8. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si121295
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
1Remove the 2 screws
and remove the top
panel.
The front panel has 4 hooks.
2Remove the 8 screws
and remove the front
panel.
3Remove the 4 screws
and remove the
discharge grille.
4Remove the 2 screws
and remove the stop
valve cover.
When reassembling, make
sure to fit the 4 hooks.
(R18653)
Top panel
Hook
Discharge grille Front panel
Hook
(R12767)
When reassembling, make
sure to fit the 4 hooks.
(R7699)
Stop
valve
cover
(R7701)

Si121295 Outdoor Fan / Fan Motor
Removal Procedure 3
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
1Remove the nut and
remove the outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
2Disconnect the
connector [S70]. [S70]: fan motor
3Release the fan motor
lead wire.
4Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower 2 hooks into the
bottom frame.
(R18756)
Nut
10 mm
(R17216)
[S70]
(R7621)
(R7579)
(R7623)
Fan motor
fixing frame
(R18757)

Outdoor Fan / Fan Motor Si121295
4Removal Procedure
5Turn the fan motor
fixing frame backward
and open the 2 hooks to
release the fan motor
lead wire.
6Remove the 4 screws
and remove the 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.
Step Procedure Points
(R7626)
(R18758)
Screw
Screw
Lead wire Outdoor fan
(R12215)

Si121295 Electrical Box
Removal Procedure 5
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
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 wire
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.
3Disconnect the
connector [S70].
[S70]: fan motor
44P
Room A Room B
Power supply
(R18561)
Screw of
earth wire
Wire
fixture
(R7208)
Outdoor temperature thermistor
Guard net
(R7209)
[S70]
(R12529)

Electrical Box Si121295
6Removal Procedure
4Release the fan motor
lead wire.
5Disconnect the
connectors [S91] [S92].
[S91]: gas pipe thermistor
(white)
[S92]: liquid pipe thermistor
(red)
6Disconnect the
connector [S40].
[S40]: overload protector
7Disconnect the
connectors [S20] [S21]
[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
Step Procedure Points
(R7579)
[S92] [S91]
(R12530)
[S40]
(R12531)
[S20] [S21] [S80]
(R12532)

Si121295 Electrical Box
Removal Procedure 7
8Disconnect the relay
connector for the
compressor.
9Disconnect the 2
connectors for the
reactor.
10 Release the discharge
pipe thermistor.
Meet the edge of the
thermistor and the fixture.
Be careful not to lose the
fixture for the thermistor.
11 Disconnect the
connector [S90].
[S90]: thermistors (outdoor
temperature, outdoor
heat exchanger,
discharge pipe)
Step Procedure Points
(R12533)
(R12534)
Discharge pipe thermistor
(R12535)
[S90]
(R7587)

Electrical Box Si121295
8Removal Procedure
12 Detach the clamp for
the thermistors from the
electrical box.
13 Remove the screw on
the right side of the
electrical box.
14 Loosen the screw at the
front of the electrical
box.
15 Lift and remove the
electrical box.
Step Procedure Points
Clamp
(R12771)
(R12536)
(R7590)
(R12537)