Daikin 4MXL36TVJU User Manual Download | Manualshive

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REMOVAL

PROCEDURE

S E R V I C E M A N U A L

Outdoor Unit

Inverter

Multi Type

36000/48000 Btu/h Class

Si121858E

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Summary of Contents for 4MXL36TVJU

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Multi Type 36000 48000 Btu h Class Si121858E ...

Page 2: ...Service Manual Removal Procedure Outdoor Unit Heat Pump 4MXL36TVJU 5MXS48TVJU ...

Page 3: ...ansion Valve Coil for Bypass Circuit Four Way Valve Coil 12 5 Electrical Box Partition Plate Sound Blankets 16 6 Gas Liquid Pipe Thermistor ASSY 18 7 Electronic Expansion Valve 19 8 Four Way Valve Electronic Expansion Valve for Bypass Circuit 21 9 Compressor 23 Note The illustrations may be slightly different depending on the model ...

Page 4: ...lies before disassembling work Step Procedure Points 1 Remove the 10 screws and remove the top panel 2 Remove the 6 screws and remove the right side panel When reassembling make sure that the 2 hooks are securely fastened 3 Remove the screw and remove the front panel 2 Top panel R25751 Right side panel R25752 R25753 Front panel 2 R25754 ...

Page 5: ...move the 8 screws of the front panel 1 5 Slide the fan motor fixing frame to the left and unfasten the 2 hooks 6 Unfasten the hook and remove the front panel 1 Step Procedure Points Front panel 1 R25755 Hook Fan motor fixing frame R25756 Hook R25757 ...

Page 6: ...cedure 7 Remove the 4 screws of the discharge grille 8 Unfasten the 4 hooks and remove the discharge grille When reassembling make sure that the 4 hooks are securely fastened Step Procedure Points Discharge grille R25758 Hook Hook R25759 ...

Page 7: ... 2 Remove the 2 screws Slide upward and remove the shield plate 3 4 Disconnect the connector S70 Cut the clamp S70 fan motor 5 6 Release the fan motor lead wire from the 6 hooks and the groove Detach the wire clamp material from the fan motor lead wire When reassembling wrap around with the wire clamp material 2 times or more around the fan motor lead wire at the position of the clamp Shield plate...

Page 8: ... with the D cut section of the motor shaft 8 Remove the 4 screws and remove the fan motor When reassembling put the fan motor lead wire through the hole of the fan motor mounting plate so as not to be entangled with the outdoor fan Step Procedure Points D cut Outdoor fan Washer Nut Mark R25765 13 mm 1 2 inch R18965 Fan motor R25766 Lead wire Outdoor fan R3249 ...

Page 9: ... the connector S70 and release the fan motor lead wire Remove the screw and unfasten the 2 hooks of the fan motor fixing frame 5 6 Remove the 2 screws at the bottom from the top Pull out the fan motor fixing frame and outdoor fan from the top Use a long screwdriver or a jig For easy access to the bottom part top part of the fan motor fixing frame can be removed by removing 4 screws Step Procedure ...

Page 10: ...onnectors for electronic expansion valves Disconnect the 3 connectors S20 white room A S21 red room B S22 blue room C S23 yellow room D S24 white room E 5 room model only S40 overload protector S201 S202 service monitor PCB 4 Disconnect the 4 connectors S25 red electronic expansion valve for bypass circuit S90 thermistor ASSY S92 gas pipe thermistors S93 liquid pipe thermistors Refrigerant pipe fi...

Page 11: ...y connector for compressor S70 fan motor S80 four way valve coil 9 Release the wires from the 6 hooks 10 Remove the 13 screws and lift up the main PCB When unscrewing make sure to support the PCB not to drop Make sure not to deform the refrigerant pipe Be careful the silicone grease not to adhere the peripheral Step Procedure Points E1 S10 S HL1 HN1 E2 E3 R25772 Relay connector for compressor S70 ...

Page 12: ...92 gas pipe thermistors S93 liquid pipe thermistors S201 S202 service monitor PCB 2 Remove the service monitor PCB When reassembling make sure that the 2 hooks are securely fastened 1 Remove the 2 screws and remove the shield plate right 2 Remove the screw and remove the switch cover When reassembling make sure that the 2 hooks are securely fastened Step Procedure Points E3 E2 HN1 HL1 E1 S10 S202 ...

Page 13: ... that the 4 hooks are securely fastened 4 5 Disconnect the 2 connectors S501 and S502 from the service monitor PCB Detach the 4 projections and remove the service monitor PCB S501 S502 to main PCB Step Procedure Points Service monitor PCB cover R25780 R22312 Back view Projection S502 S501 Service monitor PCB Projection R25781 ...

Page 14: ...Y rear plate has to be removed If the conduit mounting plate can be unhooked the rear plate can be removed without removing connecting wires 4 room model does not have the terminal block for Room E 1 Remove the screws on the terminal blocks earth ground screws and disconnect the 5 connecting wires Room A B C D E and power supply wire 2 Loosen the lock nuts and remove conduits together with the 5 c...

Page 15: ... thermistor holder 2 Unfasten the 2 hooks to open the holder and pull out the outdoor temperature thermistor 3 4 Pull out the outdoor temperature thermistor through the hole Cut the 2 clamps and pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor Step Procedure Points Hook Rear plate Conduit mounting plate Hook R25785 Hook Holder R25786 Hook Hook Outdo...

Page 16: ... sound blanket outer 6 Detach the velcro tape and release the discharge pipe thermistor lead wire 7 Pull out the discharge pipe thermistor Be careful not to lose the clip for the thermistor Step Procedure Points Sound blanket outer R25788 Discharge pipe thermistor lead wire Velcro tape R25791 Discharge pipe thermistor R25790 Clip R25789 ...

Page 17: ...tronic expansion valve coil for bypass circuit 1 Pull out the clamp and remove the electronic expansion valve coil for bypass circuit 5 Remove the four way valve coil Insert a long screwdriver from the hole near the terminal blocks 1 Remove the screw and remove the four way valve coil Step Procedure Points Clamp B Hook Clamp A R25792 Thermistor ASSY R25793 Clamp Electronic expansion valve coil for...

Page 18: ...rical box When reassembling make sure that the 3 hooks are securely fastened 1 2 3 Pull out the 3 clamps Remove the 4 screws Lift up and remove the electrical box 2 Remove the partition plate When reassembling fit the hook on the partition plate to the notch of the outdoor heat exchanger plate 1 Remove the 2 screws and remove the partition plate Clamp Electrical box R25797 Hook Terminal block side...

Page 19: ...ck of the retainer of overload protector When replacing the compressor be sure to replace the radiation sheet 3 Put in the harness of overload protector through the window of the sound blanket inner If the overload protector needs to be replaced release the 2 hooks and remove the overload protector 4 Remove the sound blanket inner Step Procedure Points Sound blanket top R25802 Sound blanket outer ...

Page 20: ...careful not to lose the clip of the thermistor 1 2 Cut the 5 clamps Pull out the 5 gas pipe thermistors and remove the gas pipe thermistor ASSY 2 Remove the liquid pipe thermistor ASSY 4 room model has 4 liquid pipe thermistors 1 Remove the putties 2 Pull out the 5 liquid pipe thermistors and remove the liquid pipe thermistor ASSY The number of the liquid pipe thermistors varies depending on the m...

Page 21: ... refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when heating up the brazed part Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence per...

Page 22: ...ion valve Cover the peripheries with protection sheet not to burn 1 2 3 Remove the putties Heat up the 2 brazed parts and remove the electronic expansion valve Remove other electronic expansion valves in the same way Step Procedure Points Brazed part Putty Electronic expansion valve R25814 ...

Page 23: ...ation of the gaskets affected by heat Keep below 120 C 248 F For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry Note Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when heating up the brazed part Do not use a metal saw for cutting pipes by all means because the sawdust comes i...

Page 24: ...t to be heated up with protection sheet 2 Remove the electronic expansion valve for bypass circuit The fusible plug melts at 70 C 158 F Make sure to cover the fusible plug not to be heated up with protection sheet 1 Heat up the 2 brazed parts and remove the electronic expansion valve for bypass circuit Step Procedure Points Protection bushing U red V yellow W blue R25816 Four way valve Brazed part...

Page 25: ...itrogen replacement when heating up the brazed part Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to burn the compressor termin...

Page 26: ...nd disconnect it Heat up the brazed part of the suction side pipe and disconnect it Remove the 3 nuts Lift up the compressor and remove it Cover the peripheries with protection sheet not to burn Step Procedure Points Nut Brazed part of the suction side pipe Brazed part of the discharge side pipe Compressor Putty R25821 ...

Page 27: ...Revision History Month Year Version Revised contents 02 2019 Si121858E First edition ...

Page 28: ...sories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion Read the user s manual carefully before using this product The user s manual provides important safety instructi...

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