Grundfos MLE Series Instructions Manual
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Grundfos MLE Series Instructions Manual

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GRUNDFOS INSTRUCTIONS
MGE and MLE model J
Service instructions

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  • Page 1 GRUNDFOS INSTRUCTIONS MGE and MLE model J Service instructions...

  • Page 3: Table Of Contents

    English (GB) Service instructions 1. Symbols used in this document Original service instructions CONTENTS 1.1 Warnings against hazards involving risk of death or personal injury Page Symbols used in this document CAUTION Warnings against hazards involving risk of death or Indicates a hazardous situation which, if not avoided, personal injury could result in minor or moderate personal injury.

  • Page 4: General Information

    (letters) refer to section 5. Service Tx30 16 x M6 tools. Tx30 14 x 6 5-6* Electrical parts must only be serviced by Grundfos or an Tx30 authorised service workshop. Tx40 Torx screw WARNING 251d Tx25...

  • Page 5: Service Tools

    5. Service tools Further Pos. Designation For pos. information Standard tools Standard tools Screwdriver 156, 252b Straight slot, 8 mm Screwdriver 273b, 502 Straight slot, 3 mm 273a, Screwdriver Torx20 277a, 288a 152,181 Torx25 Screwdriver 268, 251d Torx27 178, 185, Screwdriver Torx30 192, 289a...

  • Page 6: Megging

    6. Megging 7.2 Replacing the battery Applies only to the FM300 functional module. An installation with MGE motors must not be megged 1. Disconnect the power supply. as this may damage the built-in electronic parts. 2. Remove the terminal box cover. See section 7.1 Replacing Motor windings may, however, be megged if the the terminal box cover.

  • Page 7: Replacing The Control Panel

    7.4 Replacing the control panel 7.5 Replacing the CIM module 1. Disconnect the power supply. 1. Disconnect the power supply. 2. Remove the terminal box cover. See section 7.1 Replacing 2. Remove the terminal box cover. See section 7.1 Replacing the terminal box cover.

  • Page 8: Replacing The Isolation Cover

    9. Fit the frame screw in the CIM module. 7.7 Replacing the functional module 10. Fit the cover by leading the slits into the end with the plug 1. Disconnect the power supply. connection and clicking the locking taps onto the isolation 2.

  • Page 9: Replacing The Power Module

    7.8 Replacing the power module 7.9 Replacing the terminal box If the power module is replaced, the entire bottom of the terminal 1. Disconnect the power supply. box must be replaced. 2. Remove the terminal box cover. See section 7.1 Replacing 1.

  • Page 10: Replacing The Stator Housing

    7.10 Replacing the stator housing 7.12 Replacing the bearings (MGE 100 and below) 1. Disconnect the power supply. Dismantling 2. Remove the screws (178) and take the terminal box (251a 1. Disconnect the power supply. and 251b) out of the stator housing (150). 2.
  • Page 11 10. Wrap the rotor in a protective material, such as cardboard, to Assembly protect it from scratches. 1. Place the rotor on a vice. Do not tighten the vice on the rotor! 11. Place the rotor on the vice. Do not tighten the vice on the 2.

  • Page 12: Replacing The Bearings (Mge 112, 132, 160)

    7.13 Replacing the bearings (MGE 112, 132, 160) CAUTION Dismantling Crushing of hands 1. Disconnect the power supply. Minor or moderate personal injury - Watch your fingers when you insert the rotor, as 2. Remove the stator housing from the terminal box. See section the magnet will pull rotor and stator together with 7.10 Replacing the stator housing.
  • Page 13 Assembly 14. Fit the locking ring (188). 1. Fit the O-rings (150b). 2. Clean the bearing journal in the non-drive end with a clean cloth. 3. Lubricate the bearing. 15. Fitting the locking ring 16. Fit the drive end flange (156b). Use a thin pin to align the holes of the bearing plates (155) with the holes of the flange.

  • Page 14: Replacing The Ip66 Gamma Rings

    18. Remove the flange mounting tool and nuts. The flange should stay in place. 19. Fit the screws (185) and nuts (208b). Cross-tighten the screws. Torque: 5-6 Nm. 20. Fit the gaskets (208a) and screws (208) in the two available holes of the flange.

  • Page 15: Configuring The Controller

    Use the PC Tool E-products for that purpose. To establish connection to the motor, use the Grundfos GO Remote MI 301 or PC Tool Link. Fig. 34 Selecting the user interface 7.15.1 Connection to motor by means of Grundfos GO...
  • Page 16 Radio Scan 9. Mark the pump to be connected and click [Connect]. See figures 40 and 41. 1. Switch on the power supply to the pump. 2. Connect the MI 301 to the PC. 3. Place the MI 301 at a distance of maximum 10 metres from the pump.
  • Page 17 • PC Tool E-products, version 14.00.00 or newer 3. Place the MI 301 at a distance of maximum 10 metres from • Grundfos PC Tool Link the pump. • GENIbus cable (RS-485). 4. Start PC Tool. The first time the program is started, the Procedure message "No COM port selected"...

  • Page 18: Lubricating The Bearings

    The factory-set interval between relubrications is stated on the grease. bearing nameplate placed on the motor. The relubrication interval can be changed by a Grundfos service technician. It is possible to relubricate the bearings five times according to the preset interval. When the preset interval has been reached after the fifth relubrication, a warning will be given to replace the bearings.

  • Page 19: Fault Finding

    The fault cause will be stored in the pump alarm or warning log. Fault indications via Grundfos Eye See the indication of motor status by means of Grundfos Eye and the contact positions of signal relays in the installation and operating instructions for the MGE motor.

  • Page 20: Fault Indications

    9.2 Fault indications The fault indication below can be read by means of the number in brackets, as text or as status indications on the control panel, depending on the equipment available. Grundfos Eye Condition/cause Remedy External fault (3) An external signal has reported an Check the parameter or the unit reporting the "External fault"...
  • Page 21 Grundfos Eye Condition/cause Remedy High motor temperature (65, 66) The motor temperature is too high. a) Check that the ambient temperature is within the specified range. b) Check that the pump is not covered by dust, dirt or other foreign matter which reduces the air cooling of the pump.

  • Page 22: Functional Module

    9.3 Functional module WARNING Electric shock Death or serious personal injury - Do not touch the terminals of the power module as they are still live. - Do not touch the relay RL1 as it may still be live. Measuring equipment must be free of static electricity or have same potential as the motor before being used for measurement without isolation cover.
  • Page 23 2. If the light diode is flashing, the functional module is working correctly. The fault may then be in the control panel. See section 7.4 Replacing the control panel. If the status diode of the functional module is off, check if the power module supplies voltage by measuring 8.5 VDC on the VFE plug connection between the functional module and the power module (see fig.
  • Page 24 Measure the voltage across the input and read the current in the Fig. 58 Testing the digital input circuit by means of Grundfos GO Remote or PC Tool. The current value must be equal to voltage divided with resistance. Digital output, DO/open collector, OC Alternatively, a milliammeter can be connected in series with the See the settings of the output in PC Tool.

  • Page 25: Power Module

    9.4 Power module WARNING Electric shock Death or serious personal injury - Do not touch the terminals of the power module as they are still live. Measuring equipment must be free of static electricity or have same potential as the motor before being used for measurement without isolation cover.
  • Page 26 4. Measure the DC voltage across the capacitors (GND and DC+) to ensure that the capacitors are not short-circuited. If the function is correct, the voltage must be ≥ 566 V (at a mains voltage of 400 V). See figures 63 and 64. If not, the module is defective.

  • Page 27: Winding Resistance

    9.5 Winding resistance As the motor is star-connected, the easiest way to measure the winding resistance is to measure across two phases. Measure at the coil temperatures stated in the table below. It may be necessary to let the motor cool off if it has been running or if it was stopped because of short circuit or overload.
  • Page 28 Min./max. resistance across two phases Type [Ω] Motor Voltage [VAC] Power [kW/hp] 20 °C 60 °C 80 °C 0.25 / 0.33 12 / 14 13.8 / 16.2 14.8 / 17.3 1 x 200-240 0.37 / 0.5 12 / 14 13.8 / 16.2 14.8 / 17.3 1500-2000 0.25 / 0.33...
  • Page 29 Min./max. resistance across two phases Type [Ω] Motor Voltage [VAC] Power [kW/hp] 20 °C 60 °C 80 °C 3 x 380-500 3000-4000 3.7 / 5.0 1.3 / 1.5 1.5 / 1.8 1.6 / 1.9 MGE 112, 3 x 440-480 MLE 112 3400-4000 3 x 200-240 3.7 / 5.0...

  • Page 30: Exploded View

    10. Exploded view Fig. 68 MGE model J, MGE 132...

  • Page 31: Disposal

    11. Disposal This product or parts of it must be disposed of in an environmentally sound way: 1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Grundfos company or service workshop.
  • Page 35 GRUNDFOS Pumps (Hong Kong) Ltd. Turkey Norway Unit 1, Ground floor BOMBAS GRUNDFOS DO BRASIL GRUNDFOS POMPA San. ve Tic. Ltd. Sti. Siu Wai Industrial Centre GRUNDFOS Pumper A/S Av. Humberto de Alencar Castelo Branco, Gebze Organize Sanayi Bölgesi 29-33 Wing Hong Street &...
  • Page 36 99137804 0419 ECM: 1258922 www.grundfos.com...

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