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Daikin RKN18NMVJU Service Manual
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Daikin RKN18NMVJU Service Manual

18000 btu/h class
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Si001556E
REMOVAL
PROCEDURE
S E R V I C E
M A N U A L
18000 Btu/h Class
Outdoor Unit
Inverter
Pair Type

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Summary of Contents for Daikin RKN18NMVJU

  • Page 1 Si001556E REMOVAL PROCEDURE S E R V I C E M A N U A L 18000 Btu/h Class Outdoor Unit Inverter Pair Type...
  • Page 2 Service Manual Removal Procedure Outdoor Unit Cooling Only RKN18NMVJU...

  • Page 3: Table Of Contents

    Si001556E Table of Contents 1. Outer Panels ...................2 2. Outdoor Fan / Fan Motor.................4 3. Electrical Box ..................7 4. PCB.......................10 5. Thermistor ASSY / Partition Plate ............12 6. Sound Blankets ..................16 7. Electronic Expansion Valve Coil / Compressor........17 Removal Procedure...

  • Page 4: Outer Panels

    Outer Panels Si001556E 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. (R21871) Remove the 8 screws Front panel of the front panel.
  • Page 5 Si001556E Outer Panels Step Procedure Points Unfasten the 2 hooks on the right side. Front panel Remove the front panel. Hook (R21874) Remove the 4 screws Discharge grille of the discharge grille. (R20906) Unfasten the 2 hooks and remove the discharge grille.

  • Page 6: Outdoor Fan / Fan Motor

    Outdoor Fan / Fan Motor Si001556E 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 Si001556E Outdoor Fan / Fan Motor Step Procedure Points Remove the nut and Nut size : M8 remove the outdoor fan. 13 mm (0.51 inch) (R18965) Align the mark of the outdoor fan with the D-cut section of the motor shaft when reassembling.
  • Page 8 Outdoor Fan / Fan Motor Si001556E Step Procedure Points Unfasten the 3 hooks Fan motor lead wire on the fan motor fixing frame and release the fan motor lead wire. Hook (R21881) Remove the 4 screws and remove the fan motor.

  • Page 9: Electrical Box

    Si001556E Electrical Box 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 Remove the 2 screws of the terminal cover. Terminal cover (R21883) Open the terminal cover Hook and pull down to unfasten the 2 hooks.
  • Page 10 Electrical Box Si001556E Step Procedure Points Remove the 2 screws When reassembling, be sure and remove the conduit to fit the 2 hooks on the mounting plate. conduit mounting plate to the right side panel. Conduit mounting plate Hook (R21886) (R21918) Remove the 2 screws.
  • Page 11 Si001556E Electrical Box Step Procedure Points 11 Disconnect the [S40]: overload protector connector [S40]. [S40] (R21890) 12 Disconnect the [S30]: compressor motor connector [S30]. [S30] (R21891) 13 Disconnect the [S90]: thermistors connector [S90] and pull out the clamp. [S90] Clamp (R21892) 14 Remove the screw and remove the electrical...

  • Page 12: Pcb

    Si001556E 4. PCB Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw of Terminal board the terminal board. (R21894) Remove the earth / Clamp Terminal board mounting plate ground screw and pull out the clamp from the...
  • Page 13 Si001556E Step Procedure Points Remove the 3 screws A long screwdriver is Spacer Hook of the PCB. necessary for removing these screws. Unfasten the 2 spacers and the 2 hooks to remove the PCB. Spacer Hook (R21897) (R21898) Removal Procedure...

  • Page 14: Thermistor Assy / Partition Plate

    Thermistor ASSY / Partition Plate Si001556E 5. Thermistor ASSY / Partition Plate Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw of the stop valve cover. Stop valve cover (R21899)
  • Page 15 Si001556E Thermistor ASSY / Partition Plate Step Procedure Points Remove the 4 screws of the right side panel. Right side panel (R21903) Unfasten the 4 hooks When reassembling, make Hook and remove the right sure to fit all the hooks. side panel.
  • Page 16 Thermistor ASSY / Partition Plate Si001556E Step Procedure Points Open the sound blanket Be careful not to lose the Sound blanket (top) (top) and detach the fixture for the thermistor. discharge pipe thermistor. Fixture (R20999) Discharge pipe thermistor (R21906) Remove the thermistor Thermistor ASSY ASSY.
  • Page 17 Si001556E Thermistor ASSY / Partition Plate Step Procedure Points 13 Remove the 2 screws When reassembling, fit the and remove the lower hook into the bottom Partition plate partition plate. frame. Hook Bottom frame (R20947) (R21910) Removal Procedure...

  • Page 18: Sound Blankets

    Sound Blankets Si001556E 6. Sound Blankets Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound Since the piping ports on the blanket (top). sound blanket are torn easily, remove the blanket carefully.

  • Page 19: Electronic Expansion Valve Coil / Compressor

    Si001556E Electronic Expansion Valve Coil / Compressor 7. Electronic Expansion Valve Coil / 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 20 Electronic Expansion Valve Coil / Compressor Si001556E Step Procedure Points Remove the terminal cover. Terminal cover (R21915) Remove the protection Overload protector Protection bushing U (red) bushing. Disconnect the compressor lead wires and the overload protector. V (yellow) W (blue) (R21916) Heat up the brazed part Brazed part of the...
  • Page 21 Revision History Month / Year Version Revised contents 07 / 2015 Si001556E First edition...
  • Page 22 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.