Daikin 2MXS18NMVJU Service Manual
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Daikin 2MXS18NMVJU Service Manual

Removal procedure of 18000/24000/36000 btu/h class
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Table of Contents

Si121558EA
REMOVAL
PROCEDURE
S E R V I C E
M A N U A L
18000/24000/36000 Btu/h Class
Outdoor Unit
Inverter
Multi Type

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Summary of Contents for Daikin 2MXS18NMVJU

  • Page 1 Si121558EA REMOVAL PROCEDURE S E R V I C E M A N U A L 18000/24000/36000 Btu/h Class Outdoor Unit Inverter Multi Type...
  • Page 2 Service Manual Removal Procedure Outdoor Unit Heat Pump 2MXS18NMVJU 3MXS24NMVJU 4MXS36NMVJU 2MXL18QMVJU 3MXL24QMVJU...

  • Page 3: Table Of Contents

    Si121558EA Table of Contents 1. Outer Panels ...................2 2. Outdoor Fan / Fan Motor.................4 3. Right Side Panel / Electrical Box.............6 4. PCBs .....................11 5. Thermistor ASSYs.................16 6. Electronic Expansion Valve Coil ASSY..........18 7. Partition Plate / Sound Blankets............19 8. Four Way Valve..................21 9.

  • Page 4: Outer Panels

    Outer Panels Si121558EA 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 Remove the 6 screws Top panel and remove the top panel. (R22351) Remove the 8 screws of the front panel.
  • Page 5 Si121558EA Outer Panels Step Procedure Points Unfasten the 2 hooks When reassembling, make on the right side. sure that the 2 hooks are Front panel securely fastened. Remove the front panel. Hook (R22280) Remove the 4 screws of the discharge grille. Discharge grille (R22281) Unfasten the 2 hooks...

  • Page 6: Outdoor Fan / Fan Motor

    Outdoor Fan / Fan Motor Si121558EA 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 Remove the drip proof Drip proof cover cover.
  • Page 7 Si121558EA Outdoor Fan / Fan Motor Step Procedure Points Remove the nut and Nut size: M8 remove the outdoor fan. D-cut 13 mm (0.51 inch) (R18965) When reassembling, align mark of the fan rotor with the D-cut section of the motor shaft.

  • Page 8: Right Side Panel / Electrical Box

    Right Side Panel / Electrical Box Si121558EA 3. Right Side Panel / 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 terminal Terminal cover cover.
  • Page 9 Si121558EA Right Side Panel / Electrical Box Step Procedure Points Remove the 19 screws Terminal board on the 5 terminal boards and disconnect the 4 connecting wires (Room A, B, C, D) and Room A Room B Power supply power supply wire. wire power supply Connecting wire...
  • Page 10 Right Side Panel / Electrical Box Si121558EA Step Procedure Points Remove the 4 screws. (R22298) Release the outdoor Some models do not have a Slit Outdoor temperature thermistor slit for outdoor temperature temperature from the slit. thermistor harness. thermistor Remove the 3 screws. When reassembling, make sure that the 2 hooks are Unfasten the 2 hooks...
  • Page 11 Si121558EA Right Side Panel / Electrical Box Step Procedure Points Disconnect the 4 [S20] (white): room A [S22] [S23] connectors for [S21] (red): room B electronic expansion [S22] (blue): room C [S21] valve coil. [S23] (yellow): room D [S20] 2-room model does not have [S22], [S23].
  • Page 12 Right Side Panel / Electrical Box Si121558EA Step Procedure Points Pull out the clamp (1) Clamp (2) and cut the clamp (2). Clamp (1) (R23006) Pull out the clamp at the back of the electrical box. Clamp (R23007) Remove the screw and remove the electrical Electrical box.

  • Page 13: Pcbs

    Si121558EA PCBs 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 When reassembling, make Switch cover monitor PCB. sure that the 2 hooks are securely fastened.
  • Page 14 PCBs Si121558EA Step Procedure Points Unfasten the 4 Projection projections and remove the service monitor PCB. Service monitor PCB Projection (R22314) 2. Remove the main PCB. Remove the 2 screws. (R22315) Turn over the terminal Before pulling out the Terminal for power supply mounting plate.
  • Page 15 Si121558EA PCBs Step Procedure Points Cut the clamp and Before pulling out the Black Clamp disconnect the 2 terminals, confirm the White terminals for room B terminal locations. (black and white). Black White (R22319) (R22318) Pull out the 3 clamps. Clamp Clamp (R23008)
  • Page 16 PCBs Si121558EA Step Procedure Points Disconnect the [S]: to terminal board connector [S]. (R22322) Cut the clamp. Clamp (R22323) Pull out the 4 clamps. Clamp Clamp (R22324) Removal Procedure...
  • Page 17 Si121558EA PCBs Step Procedure Points 10 Remove the 8 screws. (R23078) 11 Unfasten the 4 hooks and remove the main PCB. Hook (R22326) Main PCB (R22327) Removal Procedure...

  • Page 18: Thermistor Assys

    Thermistor ASSYs Si121558EA 5. Thermistor ASSYs 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 thermistor Be careful not to lose the clip ASSY. for the thermistor.
  • Page 19 Si121558EA Thermistor ASSYs Step Procedure Points 2. Remove the gas pipe The number of the gas pipe thermistors ASSY. thermistors varies depending on the model. Cut the 4 clamps and pull out the 4 gas pipe Be careful not to lose the clip thermistors.

  • Page 20: Electronic Expansion Valve Coil Assy

    Electronic Expansion Valve Coil ASSY Si121558EA 6. Electronic Expansion Valve Coil ASSY 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.

  • Page 21: Partition Plate / Sound Blankets

    Si121558EA Partition Plate / Sound Blankets 7. 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 When reassembling, fit the plate.
  • Page 22 Partition Plate / Sound Blankets Si121558EA Step Procedure Points Remove the sound Since the piping ports are blanket (outer). torn easily, remove the sound blanket carefully. Sound blanket (outer) (R22344) Remove the sound blanket (inner top). Sound blanket (inner top) (R22345) Remove the sound blanket (inner).

  • Page 23: Four Way Valve

    Si121558EA Four Way Valve 8. Four Way Valve 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.
  • Page 24 Four Way Valve Si121558EA Step Procedure Points Remove the terminal cover. Terminal cover (R22348) Remove the protection Overload Protection bushing U (red) bushing. protector Disconnect the compressor lead wires and the overload protector. V (yellow) W (blue) (R20954) Heat up the 4 brazed Four way valve Brazed part parts and remove the...

  • Page 25: Compressor

    Si121558EA Compressor 9. Compressor 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.
  • Page 26 Compressor Si121558EA Step Procedure Points Remove the terminal cover. Terminal cover (R22348) Remove the protection Overload Protection bushing U (red) bushing. protector Disconnect the compressor lead wires and the overload protector. V (yellow) W (blue) (R20954) Remove the putty. Brazed part of the Brazed part of the discharge side pipe suction side pipe...
  • Page 27 Revision History Month / Year Version Revised contents 08 / 2015 Si121558E First edition 02 / 2016 Si121558EA Model Addition: 2MXL18QMVJU, 3MXL24QMVJU...
  • Page 28 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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