Daikin 2MXU40GV1B, Service Manual Removal Procedure

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Multi Type 4 0 5 0 kW Class Si121091...

Page 2: ...Service Manual Removal Procedure Outdoor Unit zHeat Pump 2MXU40GV1B 2MXU50GV1B...

Page 3: ...tor 11 5 Removal of Fan valve duct ASSY 14 6 Removal of Hygroscopic Fan Rotor Hygroscopic Fan Motor 16 7 Removal of Panels and Plates 17 8 Removal of Electrical Box 20 9 Removal of PCB 25 10 Removal o...

Page 4: ...ng Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 External appearance 2 Removal of the humidifier unit 1 Remove the 4 screws...

Page 5: ...the hose cover 3 Take out the humidifying hoses 4 The figure shows the arrangement of the relay harness Be sure to wait 10 minutes or more after turning off the power supply before disconnecting the...

Page 6: ...f the power supply before disconnecting the connectors Pull out the connector while pushing up the hook on the bottom side When lifting up the humidifier unit be careful not to pull the relay harnesse...

Page 7: ...ff all power supplies before disassembling work Step Procedure Points Internal structure of the humidifier unit Preparation Remove the top panel according to Removal of Humidifier Unit The humidifying...

Page 8: ...ion Element Humidifying Rotor Motor Si121091 6 Removal Procedure 2 Detach the harness for heater from the groove 3 Remove the duct 4 Release the lead wire for humidifying rotor motor from 2 hooks Step...

Page 9: ...Removal Procedure 7 5 Remove the 2 screws to remove the heater ASSY Do not dismount the heater ASSY 2 Removal of the humidifying rotor 1 Detach the lead wire for fan motor from the groove 2 Remove the...

Page 10: ...umidifying rotor up to remove A heat catalyst black is applied on the upper side 3 Removal of the humidifying rotor motor 1 Disconnect the connector for the humidifying rotor motor 2 Remove the 2 scre...

Page 11: ...minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Removal of the damper motor Disconnect the connector for the humidifying rotor motor Refer to pa...

Page 12: ...Removal of Damper Motor Si121091 10 Removal Procedure 2 Remove the 2 screws 3 Remove the damper motor Step Procedure Points R0233 R0234...

Page 13: ...1 4 Removal of Limit Switch Humidifying Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Removal o...

Page 14: ...rmistor Si121091 12 Removal Procedure 2 Push up the limit switch with a flat screwdriver 3 Disconnect the terminals 4 Release the harness from the hooks and remove the harness ASSY Step Procedure Poin...

Page 15: ...humidifying thermistor When replacing the humidifying thermistor order a seal material together 1 Peel off the seal material 2 Pull out the humidifying thermistor When reassembling put the harness thr...

Page 16: ...embling work Step Procedure Points Preparation Remove the heater ASSY and the humidifying rotor The humidifying rotor is located under the heater ASSY and the duct 1 Remove the 7 screws of the fan val...

Page 17: ...lve duct ASSY Removal Procedure 15 2 Release the 2 hooks on the right side Release the hooks while bending the right side panel 3 Lift up the fan valve duct ASSY to remove Step Procedure Points R0243...

Page 18: ...ccording to Removal of Humidifying Rotor 1 Disconnect the connector for fan motor and remove the bell mouth on adsorption side 2 Unscrew the fan fixing nut M6 of the hygroscopic fan rotor ASSY sirocco...

Page 19: ...l power supplies before disassembling work Step Procedure Points 1 External appearance Remove the humidifying unit Do not release the mounting plate at this point 2 Remove the 8 screws to remove the f...

Page 20: ...emove the 4 screws of the discharge grille 4 Release the 4 hooks and remove the discharge grille When reassembling make sure to fit the 4 hooks 5 Remove the 2 screws of the stop valve cover and remove...

Page 21: ...Si121091 Removal of Panels and Plates Removal Procedure 19 When reassembling the stop valve cover make sure to fit the 4 hooks Step Procedure Points R9934...

Page 22: ...screws on the terminal board The terminal board is united resin formation 1 Remove the 2 grounding screws Remove the 2 screws to remove the wiring fixture Then remove the all screws for the connectors...

Page 23: ...g plate 4 Disconnect the connector for the fan motor S70 5 Release the lead wire for the fan motor from the hooks 6 Disconnect the connector for the gas pipe thermistor S91 and for the liquid pipe the...

Page 24: ...isconnect the connectors S20 S21 and S80 S20 white Electronic expansion valve coil for room A S21 red Electronic expansion valve coil for room B S80 Four way valve coil 9 Disconnect the connector for...

Page 25: ...e discharge pipe thermistor 12 Disconnect the connector for the thermistor ASSY S90 S90 Thermistor ASSY Outdoor air Heat exchanger Discharge pipe 13 Undo the wire clamp for the thermistor ASSY under t...

Page 26: ...ove the screw on the right side of the electrical box 16 Remove the grounding screws of earth wires 17 Remove the screw in front of the electrical box 18 Lift up the electrical box to remove Step Proc...

Page 27: ...ion Remove the panels plates and electrical box according to the removal procedure The control PCB is adopted upside down The lead free solder PbF is used on PCB When exchange use exclusive solder and...

Page 28: ...re 3 Remove the 2 screws of the terminal boards 4 Release the outdoor air thermistor from the hook 5 Remove the 2 screws and detach the 1 clip to remove the radiation shield plate Step Procedure Point...

Page 29: ...91 Removal of PCB Removal Procedure 27 The clip is push mount type 6 Cut off the clamps at 2 locations and disconnect the wire harnesses Step Procedure Points R9961 Compressor harness Clip Hole R9962...

Page 30: ...t up the back side slightly and release the hooks of the front When reassembling make sure that the hooks of the electrical box are placed on the PCB 9 Release the lead wires from the hook and remove...

Page 31: ...Si121091 Removal of PCB Removal Procedure 29 10 Lift up the control PCB to remove Step Procedure Points R9967 R9968 Control PCB...

Page 32: ...tor S70 DC Fan motor S72 Humidifying fan motor S80 Four way valve coil S90 Discharge pipe Heat exchanger Outdoor air 12 Remove the 2 screws of the radiation fin thermistor S91 Gas pipe thermistor S92...

Page 33: ...the electrical box beforehand 1 Remove the 6 screws to remove the right side panel 2 Removal of the partition plate When reassembling make sure to catch the lower hook of the partition plate 1 Remove...

Page 34: ...and pull it out 2 Lift up the sound blanket top to remove Since the piping ports are torn easily remove the blanket carefully 3 Lift up the sound blanket inside top to remove The sound blanket inside...

Page 35: ...al of Sound Blanket Removal Procedure 33 4 Open the sound blanket inside sleeve and pull it out 5 Pull out the sound blanket bottom Step Procedure Points R9975 Sound blanket inside sleeve R9976 Sound...

Page 36: ...isassembling work Step Procedure Points 1 Removal of the propeller fan Spanner size 10mm 1 Unscrew the washer fitted nut M6 by an open ended spanner to remove the propeller fan When reassembling align...

Page 37: ...ad wire 3 Remove the 1 screw to remove the fan motor fixing plate When reassembling make sure the z mark of the fan motor goes down When reassembling fit the 2 lower hooks into the bottom frame 4 Remo...

Page 38: ...g hooks of the lead wire 6 Release the fan motor lead wire When reassembling put the lead wire through the back of the motor so as not to be entangled with the propeller fan 7 Remove the 4 screws and...

Page 39: ...r 1 Undo the clip and remove the discharge pipe thermistor 2 Cut off the clamp to pull out the heat exchanger thermistor Be careful not to lose the clips for each thermistor 3 The outdoor air discharg...

Page 40: ...A Black Room B Gray S92 Liquid pipe thermistor Room A Black Room B Gray 4 The figure shows the arrangement of the assembly of the liquid gas thermistors When reassembling meet the edge of the thermist...

Page 41: ...Procedure Points 1 Remove the terminal cover Be careful so as not to burn the compressor terminals or the name plate 2 Disconnect the flag shaped terminals 3 Detach the terminals by long nose pliers...

Page 42: ...ich were heated up by a gas brazing machine so as not to get burnt your hands Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make su...

Page 43: ...brazing machine so as not to get burnt your hands Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to recover the refrigera...

Page 44: ...y to disconnect and restore 2 Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect Note Do not use a metal saw for cutting pipes by all means because the...

Page 45: ...Revision History Month Year Version Revised contents 01 2013 Si121091 First edition...

Page 46: ...ies 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 acces...