Daikin 4MKD90BVM Service Manual
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Daikin 4MKD90BVM Service Manual

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Si12-796
REMOVAL
PROCEDURE
S E R V I C E
M A N U A L
8.0/9.0 kW Class
Outdoor Unit
Inverter
Multi Type

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Summary of Contents for Daikin 4MKD90BVM

  • Page 1 Si12-796 REMOVAL PROCEDURE S E R V I C E M A N U A L 8.0/9.0 kW Class Outdoor Unit Inverter Multi Type...
  • Page 2 Service Manual Removal Procedure Outdoor Unit Cooling Only Heat Pump 4MKD90BVM 4MXD80BVMA 4MKD90BVMA 4MKD90BVMD...

  • Page 3: Table Of Contents

    Si12-796 Table of Contents 1. Removal of Outer Panels ................2 2. Removal of Propeller Fans..............5 3. Removal of Electrical Box ...............6 4. Removal of PCB..................13 5. Removal of Fan Motor................16 6. Removal of Electronic Expansion Valve and Thermistor ......18 7. Removal of Sound Blanket and Reactor ..........19 8.

  • Page 4: Removal Of Outer Panels

    Removal of Outer Panels Si12-796 1. Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step External appearance. Handle (R2208) Remove the piping in the backward direction.
  • Page 5 Si12-796 Removal of Outer Panels Step Procedure Points Unscrew 3 screws of the right panel, slide it downwards and release the tabs to remove. Right panel (Main unit side) Tabs (Right panel side) (R2211) The figure shows the view of piping PC board connections.
  • Page 6 Removal of Outer Panels Si12-796 Step Procedure Points Unscrew 3 screws of the front panel to remove. (R2214) Remove 4 screws of the discharge outlet grille. (R2215) Slide the discharge outlet grille upwards and release 6 tabs to Tabs remove. Tabs (R2216) Removal Procedure...

  • Page 7: Removal Of Propeller Fans

    Si12-796 Removal of Propeller Fans 2. Removal of Propeller Fans Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the discharge outlet grille. To take off propeller fan, remove the washer-fitted nut M8.

  • Page 8: Removal Of Electrical Box

    Removal of Electrical Box Si12-796 3. Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the outer panels Match the colors of the tie such as top and front wires to A, B, C and D ports Power terminal board...
  • Page 9 Si12-796 Removal of Electrical Box Step Procedure Points Remove the earth wire. (R2222) Remove 1 screw of the terminal board. (R2223) Release the tab on the top right of the terminal board. (R2224) Pull out the terminal Glass tube fuse and varistor Glass tube fuse (Soldered) board and open it.
  • Page 10 Removal of Electrical Box Si12-796 Step Procedure Points 2. Remove each wire harness. Disconnect 4 [S20] [S21] [S22] [S23] connectors of the white blue yellow electronic expansion Connector Electronic Harness expansion length valve lead wires. valve No. [S20] (White) [S21] (Red) [S22] (Blue) [S23] (Yellow) When reconnecting, make...
  • Page 11 Si12-796 Removal of Electrical Box Step Procedure Points Remove the connector [S92] for gas pipe thermistor. [S92] (R2230) Remove the connector [S90] for thermistor. Outdoor air thermistor (Blue) Discharge pipe [S90] thermistor (Black) Heat exchanger thermistor (Gray) (R2231) Remove the overload relay connector [S40].
  • Page 12 Removal of Electrical Box Si12-796 Step Procedure Points Remove the relay connector for compressor. Relay connector for compressor (R2234) Remove the electrical box cover. Electrical box cover (R3060) Disconnect the fan motor connector. [S70] (R2236) Remove the discharge pipe thermistor. (R2237) Removal Procedure...
  • Page 13 Si12-796 Removal of Electrical Box Step Procedure Points Take off the thermistor Place the thermistor so that Thermistor presser spring presser spring, and its end comes up to the end remove the thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.
  • Page 14 Removal of Electrical Box Si12-796 Step Procedure Points Remove the outdoor air thermistor lead wire from the groove. (R2241) Remove each wire Electrical box harness, and dismount the electrical box by lifting it. (R3061) Removal Procedure...

  • Page 15: Removal Of Pcb

    Si12-796 Removal of PCB 4. Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the controller PCB. Release the tab of the electrical box, and open the terminal board.
  • Page 16 Removal of PCB Si12-796 Step Procedure Points Lift the PCB at the terminal board side. (R2247) Disconnect each wire harness connector linked to the inverter PCB. (R2248) Removal Procedure...
  • Page 17 Si12-796 Removal of PCB Step Procedure Points The figure shows the [S20]:Electronic expansion controller PCB. valve coil A port [S93] [S92] [S90] [S21]:Electronic expansion [S80] valve coil B port [S22]:Electronic expansion valve coil C port [S23]:Electronic expansion valve coil D port [S23] [S31]:To CN14 (Pin 9) [S22]...

  • Page 18: Removal Of Fan Motor

    Removal of Fan Motor Si12-796 5. Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the outer panels. Remove the fan motor lead wire connector [S70].
  • Page 19 Si12-796 Removal of Fan Motor Step Procedure Points Remove 4 screws of the fan motor. (R2254) Cut the wrapper fixing the lead wire. When reassembling, fix the lead wire to avoid contact with the propeller fan. (R2255) Remove the fan motor. Mount the fan motor so as to position the mark on the...

  • Page 20: Removal Of Electronic Expansion Valve And Thermistor

    Removal of Electronic Expansion Valve and Thermistor Si12-796 6. Removal of Electronic Expansion Valve and Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove each wire Place the thermistor so that harness.

  • Page 21: Removal Of Sound Blanket And Reactor

    Si12-796 Removal of Sound Blanket and Reactor 7. Removal of Sound Blanket and Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Release the clip fixing the compressor lead wire.
  • Page 22 Removal of Sound Blanket and Reactor Si12-796 Step Procedure Points Remove the sound Carefully remove the sound blanket (top). blanket, which is easily torn in the piping section. Sound blanket (top) (R4767) Remove the sound blanket (inner). Sound blanket (inner) (R4768) Remove the screw of the reactor.

  • Page 23: Removal Of Shunt

    Si12-796 Removal of Shunt 8. Removal of Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove 6 screws of Fasten the rubber packing the tie wire presser with double-faced adhesive plate.

  • Page 24: Removal Of Solenoid Valve And Four Way Valve

    Removal of Solenoid Valve and Four Way Valve Si12-796 9. Removal of Solenoid Valve and Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the outer panels.
  • Page 25 Si12-796 Removal of Solenoid Valve and Four Way Valve Step Procedure Points Before taking this Reassembling precautions procedure, make sure 1. Use non-oxidizing brazing there is no refrigerant gas method. If nitrogen gas is not left in the refrigerant available, braze the parts pipes.

  • Page 26: Removal Of Compressor

    Removal of Compressor Si12-796 10.Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the terminal cover. U(red) (brown) Terminal cover W(blue) V(yellow) (R2274) Disconnect the terminals of the (R2275)
  • Page 27 Si12-796 Removal of Compressor Step Procedure Points Make sure there is no refrigerant gas left inside Warning the refrigerant pipes The compressor's refrigerating before starting the job. Putty machine oil may catch fire. Have When heating up the wet cloth at hand for quickly brazed parts, make sure putting out the fire.
  • Page 28 Revision History Month / Year Version Revised contents 07 / 2013 Si12-796 First edition...
  • Page 29 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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