Grundfos MGE 71 Service Instructions Manual
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Grundfos MGE 71 Service Instructions Manual

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GRUNDFOS INSTRUCTIONS
MGE model H/I
MGE 71, MGE 80, MGE 90
Service instructions

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Summary of Contents for Grundfos MGE 71

  • Page 1 GRUNDFOS INSTRUCTIONS MGE model H/I MGE 71, MGE 80, MGE 90 Service instructions...

  • Page 3: Table Of Contents

    English (GB) Service instructions 2. General information Original service instructions. These service instructions apply to MGE 71, MGE 80 and CONTENTS MGE 90, models H and I. Page The installation and operating instructions for Symbols used in this document Note...

  • Page 4: Secondary Materials

    Torques for terminals Further Pos. Designation For pos. information Max. torque Terminal Thread [Nm] Standard tools L1, L2, L3, L, N Screwdriver 156, 252b Straight slot, 8 mm NC, C1, C2, NO M2.5 Screwdriver 273b, 502 Straight slot, 3 mm 1- 26, A, Y, B 273a, Screwdriver...

  • Page 5: Megging

    6. Megging An installation with MGE motors must not be megged as this may damage the built-in Caution electronic parts. Motor windings may, however, be megged if the terminal box has been removed. Caution Never measure between two terminals. 1. Disconnect the power supply. 2.

  • Page 6: Replacing The Cim Module

    7. Position the control panel correctly on the four rubber pins 8. Fit the new CIM module by aligning it with the plastic holders (fig. 4, pos. C). Make sure that the locking tabs (fig. 4, pos. A) and the connecting plug. Press home the module using your are placed correctly.

  • Page 7: Replacing The Isolation Cover

    7.6 Replacing the isolation cover The example below shows a three-phase motor. 1. Disconnect the power supply. 2. Remove the terminal box cover. See section 7.1 Replacing the terminal box cover. 3. Remove control panel (pos. 290) from isolating cover (pos.

  • Page 8: Replacing The Terminal Box

    7.9 Replacing the terminal box 7.11 Replacing the fan 1. Disconnect the power supply. 1. Disconnect the power supply. 2. Remove the terminal box cover. 2. Remove the terminal box. See section 7.10 Replacing the See section 7.1 Replacing the terminal box cover. stator housing.

  • Page 9: Replacing Ip55 Seal Rings With Ip66 Rings

    16. Clean the bearing journal with a clean cloth. 7.13 Replacing IP55 seal rings with IP66 rings 17. Heat the new bearing (pos. 153) to maximum 110 °C. 1. Disconnect the power supply. 2. Remove the stator housing from the terminal box. Follow the instructions of bearing and bearing Caution See section 7.10 Replacing the stator housing.

  • Page 10: Configuring The Controller

    Use PC Tool E-products for that purpose. To establish connection to the motor, use Grundfos GO Remote MI 301 or PC Tool Link. 7.14.1 Connection to motor by means of Grundfos GO...
  • Page 11 Radio Scan 9. Mark the pump to be connected and click [Connect]. See figures 22 and 23. 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 12 • 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 the PC Tool. The first time the program is started, the Procedure message "No COM port selected"...
  • Page 13 7.14.3 Configuration with PC Tool E-products Find the desired configuration file in PC Tool E-products in this way: 1. Start the PC Tool. 2. Find the desired configuration file in PC Tool E-products in one of these ways: • Search by the configuration number. See fig. 31. •...

  • Page 14: Fault Finding

    3. If possible, test if the motor can run without load. Remove the coupling to the pump (if possible) and set the operating signal to max. by means of PC Tool, Grundfos GO Remote or R100. You can reset a fault indication in the following ways: •...

  • Page 15: Fault Indications

    8.2 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 16 Grundfos Eye Condition/cause Remedy Replace motor bearings (30) 1. The bearings must be replaced. a) Follow the instructions for the pump. See section 7.12 Replacing the bearings. Internal sensor fault (88) One yellow indicator light rotating in 1. The pump is receiving a signal from...

  • Page 17: Functional Module

    8.3 Functional module Warning The terminals of the power module are live. Relay RL1 may also be live. Warning Measuring equipment must be free of static electricity or have same potential as the motor before being used for measurement without isolation cover.
  • Page 18 3. 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 functional module and power module. If no voltage is measured, the connection between the modules or the power module is defective.
  • Page 19 Measure the voltage across the input and read the current in the circuit by means of Grundfos GO Remote or PC Tool. The current value must be equal to voltage divided with resistance. Alternatively, a milliammeter can be connected in series with the Fig.

  • Page 20: Power Module

    8.4 Power module Status, three-phase Fault • The microprocessor is frozen. Warning • No initialising message from The terminals of the power module are live. the functional module. D7 is permanently on. Switch the power supply off and on. If this does not solve the Warning problem, replace the power Measuring equipment must be free of static...
  • Page 21 4. The DC voltage across the capacitor of the intermediate circuit on the single-phase power module can be measured to make sure that the capacitor is not short-circuited. If the function is correct, the voltage must be ≥ 350 V (at a mains voltage of 230 V).
  • Page 22 5. The DC voltage across the capacitors of the intermediate circuit on the three-phase power module can be measured to make sure 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).

  • Page 23: Winding Resistance

    3.5 / 4.1 3.8 / 4.4 3000-4000 0.25 / 0.33 10.4 / 12.2 12 / 14.1 12.8 / 15.1 MGE 71, MLE 71 3 x 380-500 0.37 / 0.5 10.4 / 12.2 12 / 14.1 12.8 / 15.1 0.55 / 0.75 10.4 / 12.2...
  • Page 24 Measure between terminals T1 and T2, and between T2 and T3. Terminal Description T1, T2, T3 Input for the three phases Fig. 46 Motor terminals Fig. 47 Wiring diagram...

  • Page 25: Exploded View

    9. Exploded view Fig. 48 MGE 90...

  • Page 26: Disposal

    This product or parts of it must be disposed of in an environmen- tally 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. Subject to alterations.
  • Page 27 Turkey 20th km. Athinon-Markopoulou Av. New Zealand Тел.: +7 (375 17) 286 39 72, 286 39 73 GRUNDFOS POMPA San. ve Tic. Ltd. Sti. P.O. Box 71 Факс: +7 (375 17) 286 39 71 GRUNDFOS Pumps NZ Ltd. Gebze Organize Sanayi Bölgesi GR-19002 Peania E-mail: minsk@grundfos.com...
  • Page 28 98413121 0513 ECM: 1106756 www.grundfos.com...

This manual is also suitable for:

Mge 80Mge 90

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