Daikin RXMQ4PVE, Service Manual

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Multi Type 4 5 6 HP Class Si341211 ...

Page 2: ...Service Manual Removal Procedure Outdoor Unit Applicable Models zCooling Only RXMQ4PVE RXMQ5PVE RXMQ6PVE RXMQ4PVEE RXMQ5PVEE RXMQ6PVEE zHeat Pump RXYMQ4PVE RXYMQ5PVE RXYMQ6PVE ...

Page 3: ...cedure to Remove PCB and Electrical Component Box 5 3 Procedure to Remove Propeller Fan and Fan Motor 12 4 Procedure to Remove Thermistor 14 5 Procedure to Remove Electronic Expansion Valve and Peripheral Equipment 15 6 Procedure to Remove Four Way Valve 19 7 Procedure to Remove Compressor 20 ...

Page 4: ... front panel 2 and then remove the panel after pushing it downward to release the hook To remove the front panel for piping cover remove its 1 screw To remove the side panel for piping cover remove 4 screws of the side panel To remove the side panel remove its 6 screws after removing the outdoor air thermistor It is possible to remove only the front panel without removing the top panel Hook Top pa...

Page 5: ...ill after removing its 4 screws and releasing its 4 hooks On the rear side of the front panel 1 a reinforce plate is attached Be careful not to lose it while removing the front panel 1 7 Remove the front panel 1 after removing its 7 screws and pushing it upward Front panel 1 Discharge grill Hook Reinforce plate ...

Page 6: ... Procedure Points 8 Remove the heat exchanger cover after releasing its 3 hooks with a minus driver 9 Remove the outdoor air thermistor after pulling it to the near side and sliding to the right 10 The figure in the right is of rear side view Outdoor air thermistor R1T ...

Page 7: ...fter turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 2 fixing screws M5 of terminal block mounting plate Preliminary preparation Remove the top front and side panels according to the Procedure to Remove Outside Panels 2 Remove the fixing screw M5 above the electrical component 3 Release the hook of the resin stay from the terminal block mounting plate ...

Page 8: ...to Remove PCB and Electrical Component Box Si341211 6 Removal Procedure Step Procedure Points 4 Cut off the wiring clamp materials 3 places 5 Disconnect the connector set for the reactor lead wire from each other ...

Page 9: ...ocedure 7 Step Procedure Points 6 Pull off the connector for the motor lead wires and then release the wire from the hook of resin casing 7 Remove the wire harnesses of the solenoid valve and the four way valve from the fixing plate and then remove the electrical component ...

Page 10: ...M4 of insulation sheet and then release the lead wires to the compressor blue red and white colors and the lead wires A1P to A3P red and blue colors from the hook of resin casing 9 Remove the 2 securing screws M4 and with spring washers for the lead wires A1P to A3P red and blue colors and the condenser lead wires orange and ash colors ...

Page 11: ...rials for fixing the compressor lead wires 2 places and the lead wires A3P to X11 red blue and green colors 1 place Clamps 2 places for the compressor lead wires Clamps for the lead wires A3P to X11 11 Fold the hooks 2 places and slide the resin casing to the right to remove the casing from the electrical component assembly Hooks ...

Page 12: ...s X66A X81A and X5A 13 Pull off the reactor lead wire connectors compressor lead wire one and lead wire ones X22A X21A X13A X11A X12A X18A X17A X32A X25A X26A X27A and X28A by pulling them X66A X81A X5A X66A X81A X5A X22A X21A X13A X11A X18A X17A X32A X25A X26A X27A X28A X12A Compressor lead wire connector Reactor lead wire connectors ...

Page 13: ... the top of the PCB assembly 15 Release the locking engaging hook 2 places at the rear side 16 The figures in the right are PCB assembly Hook Fixing plate for the PCB The electrical component mounting plate The electrical component mounting plate Main PCB A1P for control PCB for cool heat selector A4P Service PCB A2P Noise filter PCB A3P ...

Page 14: ...inutes or more after turning off all power supplies before disassembling work Step Procedure Points Preliminary preparation Remove the discharge grill front panel and front panel for piping cover according to the Procedure to Remove Outside Panels 1 Remove the nuts with a washer which fixing the propeller fan Front panel 1 Discharge grill Propeller fan Nut with a washer ...

Page 15: ...e motor If the motor lead wires are not fixed by using the clamp material it may always damage the lead wire because the lead wires twined around the fan When mounting the propeller fan make the D cut correspond to the hole of the fan 3 Remove the 4 fixing screws for fan motor and then remove the fan motor Earth wire Clamp material D cut Mount the fan motor with its mark z positioned toward the bo...

Page 16: ...hermistor for suction pipe 2 after inclining the mounting spring outward 4 Pull out the subcooling thermistor and thermistor for liquid pipe after inclining the mounting spring outward 5 6 Pull out the thermistor for heat exchanger after pulling the fixing metal part Pull out the thermistor for liquid pipe after inclining the mounting spring outward When passing the thermistor for outdoor air temp...

Page 17: ...es before disassembling work Step Procedure Points 1 Pull out the coils of electronic expansion valve 2 places 2 Remove the pressure sensors 2 places When removing the sensor be sure to use 2 spanners as the left figure shows The pressure sensor is equipped with a gauge joint having a check valve Therefore when loosing the fixing nut of sensor a refrigerant leak is stopped Coil of main electronic ...

Page 18: ...l Procedure Step Procedure Points 3 Pull off the lead wire of high pressure switch 4 Remove the coil of solenoid valves 2 portions Loosen the fixing bolt above the coil of solenoid valve and then remove the coil Unloading solenoid valve Y3S High pressure switch Solenoid valve for hot gas Y2S ...

Page 19: ...g part of main body at pressure switch at its soldered portion Be careful not to crash the piping by over pressing it with a plier when pulling out it In case it is difficult to cut off by a gas welder and remove it 1 Remove any point of the piping connections brazing portions which is easy to remove or mount 2 Make it easy to remove it by cutting the piping etc of the body with a small copper pip...

Page 20: ... to keep wet Keeping a temperature of 120ºC or lower Be careful not to crash the piping by over pressing it with a plier when pulling out it In case it is difficult to cut off by a gas welder and remove it 1 Remove any point of the piping connections brazing portions which is easy to remove or mount 2 Make it easy to remove it by cutting the piping etc of the body with a small copper pipe cutter N...

Page 21: ...heating of the valve by wrapping its body with wet cloth and then supplying water to the cloth to keep wet Keeping a temperature of 120ºC or lower Be careful not to crash the piping by over pressing it with a plier when pulling out it In case it is difficult to cut off by a gas welder and remove it 1 Remove any point of the piping connections brazing portions which is easy to remove or mount 2 Mak...

Page 22: ...ctrical component and compressor fixing panel according to the Procedure to Remove Outside Panels 1 Pull off the lead wire of compressor 1 Open upward the sound insulation for the terminal cover 2 Remove the terminal cover with a minus driver etc 3 Remove the terminals for the compressor with a round nose chain pliers with side cutters etc Terminal cover Sound insulation for the terminal cover Red...

Page 23: ...move the sound insulation for the compressor 5 Remove the crankcase heater under the compressor Pull the spring to trip the catch 6 Remove the 3 fixing bolts of the compressor You can see the far side fixing bolts when the bottom discharge grill is removed Remove the bolt s in view first ...

Page 24: ...ined after being cut using a pipe cutter before replacing with a new compressor 7 Cut off the suction pipe discharge pipe and unloader pipe of compressor with a pipe cutter 3 places Compressor Discharge pipe portion Suction pipe portion Unloader piping portion Warning Refrigerant oil in the compressor may catch fire so prepare wet cloth so as to extinguish a fire rapidly Warning If refrigerant gas...

Page 25: ...Revision History Month Year Version Revised contents 08 2012 Si341211 First edition ...

Page 26: ...ories 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 z Read the User s Manual carefully before using this product The User s Manual provides important safety instruct...