Renfert Magma 2300.0000 Repair Manual Line
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Renfert Magma 2300.0000 Repair Manual Line

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Repair Guideline Magma
Date
08.06.2009
Initial version
02.02.2012
Change of Muffle, Version B added
02/2012
Art. Nr. 2300.0000 (230 V / 50/60Hz)
Art. Nr. 2300.0500 (230 V / 50/60Hz)
Engineering change
Page 1 / 28
release
MM
MM
Valid for version A and B

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Summary of Contents for Renfert Magma 2300.0000

  • Page 1 Repair Guideline Magma Art. Nr. 2300.0000 (230 V / 50/60Hz) Art. Nr. 2300.0500 (230 V / 50/60Hz) Date Engineering change release 08.06.2009 Initial version 02.02.2012 Change of Muffle, Version B added 02/2012 Valid for version A and B Page 1 / 28...

  • Page 2: Table Of Contents

    Contents Contents ..........................2 Safety information ......................3 Information symbols in the repair guidelines ..............3 Qualification and training ...................4 Repair works safety instruction ..................4 Modifications without approval from the manufacturer ..........5 Disclaimer ......................5 Contact and Service address ...................6 Needed tools and utilities ....................6 Test equipment .....................6 General Overview ......................7 Description / Application area ..................8...

  • Page 3: Safety Information

    1 Safety information These repair guidelines include essential notices that must be observed during repair work. It is important the service technician read these guidelines before beginning re- pairs. Not only the general safety instructions under the main safety notices should be observed, but also the additional specialized safety instructions.

  • Page 4: Qualification And Training

    Notices found on the appliance itself must be observed without fail. Qualification and training Personnel deployed on repair and maintenance work must be adequately qualified. If personnel do not have the necessary qualifications, they must be instructed or trained as required. Further, it must be ensured that personnel fully understand the content of these guidelines.

  • Page 5: Modifications Without Approval From The Manufacturer

    Disclaimer Renfert GmbH shall be absolved from all claims for damages or warranty if:  The product is employed for any purposes other than those cited in the operating in- structions;...

  • Page 6: Contact And Service Address

    ++49 (07731) 8208-0 Fax: ++49 (07731) 8208-70 E-Mail: info@renfert.com Internet: www.renfert.com Customers in the USA, Canada and Mexico please contact Renfert USA Inc. 3718 Illinois Avenue St. Charles, Illinois 60174 U.S.A Phone: ++1 630 762-1803 Toll free: 1 800 336-7422...

  • Page 7: General Overview

    4 General Overview Fig.1 - Overview Pos. Description ON/OFF switch Operating panel Display for temperature and time Door Thermocouple Wire for Thermocouple Fuses and power supply Flue Page 7 / 28...

  • Page 8: Description / Application Area

    Description / Application area The Magma preheating oven is solely intended for use in dental technology laborato- ries as well as arts and crafts and jewellery workshops. The preheating oven is solely intended for waxing up and preheating casting dies. Only modelling waxes and mod- elling plastics may be employed as modelling materials.

  • Page 9: Repair Works

    5 Repair Works Door removal/mounting, Change of door firebrick 5.1.1 Replacing of the handle Using the included screw, mount the handle on the side of the oven door (Figure 1), 4mm SW Allen key. The handle can be mounted on either the left or the right side. Installation of the handle is described in the operation manual.

  • Page 10: Replace Door Firebrick

    Fig.4 – left screw Fig. 5 – right screw  Gently press the metal housing outwards (Fig. 6 a) until the door is released from its retainer  Remove the door to the front (Fig. 6b) Fig.6 – Remove door 5.1.3 Replace door firebrick ...

  • Page 11: Door Sensor Replacement

    Fig. 9 – Flat spring for firebrick  Check the flat springs (Fig. 9 a) for correct seating.  Install the new firebrick in reverse order. Take care that the cutout of the firebrick (Fig. 8 b) is located at the upper end of the door. ...

  • Page 12: Rim Stone Replacement

     Reinsert the door (Fig 6) in the housing and screw the fastening screws (Fig 4 + 5) down.  Check door for smooth closing and opening.  Install the door springs. For this:  Load the springs manually  Insert the springs into the opening in the oven wall.

  • Page 13: Install Front Panel And Ledge

    Fig. 14 – front panel and rim stone  Remove the 8 screw (Fig. 14 a) from front panel and pull the front panel carefully to the front.  Now the panel can be removed upwards.  Now you can access the rim stone which can be changed easily Fig.

  • Page 14: Control Unit And Backup Battery

    Control unit and backup battery 5.3.1 Operating unit board  Switch the oven off and unplug the power cord at the wall outlet.  Allow the oven to cool off. Fig. 16 – Removing operating unit  Loosen the operating unit fastening screws (Fig 16 a) ...

  • Page 15: Backup Battery Replacement

    Fig. 19 – processor circuit board.  Remove the 7 screws (Fig. 19 a).  Remove processor circuit board (Fig. 19 b) from housing.  Install new board in reverse order. 5.3.3 Backup battery replacement  In order to keep the internal clock running when unit is switched off, a back up battery for the clock is necessary.

  • Page 16: Thermocouple Replacement

    Thermocouple replacement. Fig. 20 – thermocouple cover Abb. 21 - thermocouple wires The thermocouple must be replaced if the protective ceramic tube surrounding it is damaged. Proceed as follows:  Switch the oven off at the main power switch.  Unplug the power cord at the wall outlet.
  • Page 17  Switch the oven off at the main power switch.  Unplug the power cord at the wall outlet.  Remove the 2 fixation screws at the rear side of the unit. (Fig. 22 a)  Loosen strain relief of the heating cable (Fig. 23 a) ...

  • Page 18: Compensating Wire Replacement

    Compensating wire replacement  Remove the compensating wire from thermocouple (Fig 21) and pull the compensat- ing wire out of the guide (Fig 24 a),  Remove the power electronics according to 5.5  Remove the compensating wire from connector by unscrewing (Fig. 26 a) ...

  • Page 19: Ribbon Cable Replacement

     Remove the rear wall by unscrewing the screws (Fig 29 b) and loosening the upper screw (fig. 29 c)  Unplug grounding wire at the rear wall terminal. Fig. 30 – heating wire Fig. 31 – strain relief,  Unplug the grounding wire at the terminal (fig.

  • Page 20: On/Off Switch Replacement

     After cutting the cable tie, the ribbon cable can be changed. Don’t forget to install new cable tie  Reinstall control unit and power electronics afterwards. ON/OFF switch replacement  Switch the oven off at the main power switch. ...

  • Page 21: Unit Feet Replacement

    5.11 Unit feet replacement  The unit feet are screwed into the bottom plate of the unit only. The can be changed easily by unscrewing. The rear feet are adjustable.. 5.12 Muffle replacement.  The muffle of the unit must be changed under special conditions (ventilated room, fil- ter mask, gloves).

  • Page 22: Installing The New Muffle

    Fig. 38 – Removing the muffle  Push the defective muffle including the insulation wool backwards out of the unit (fig. 38 a)  Pack the old muffle including the wool into a sealed plastic bag and dispose it accord- ing to local rules.
  • Page 23 Fig. 41 – Installation of new muffle Fig. 42 – Isolation strip Push the new muffle (upside down) into the oven’s enclosure against the rim stone.   Use the isolation strips to fill the gap between the wool and the grey isolating plates. ...

  • Page 24: Adjustment

     Remove the black fixation sleeves from the heating wires. Don’t touch the wires!. Connect the wires to the contact clamp (Fig. 45 a) and tighten the clamp carefully.  Complete the unit in reverse oven.  Don’t forget to connect the grounding wire at the rear wall. 6 Adjustment ...

  • Page 25: Spar Part Drawing - Version A And B

    Spar part drawing – Version A and B Page 25 / 28...

  • Page 26: Spare Part List - Version A And B

    Spare part list - version A and B Art.-Nr. Description    900034799 Door firebrick    900036007 Door sensor   900035958 Ledge   923000001 Set of springs   923000002 Rubber foot    900036082 Battery ...

  • Page 27: Troubleshooting

    10 Troubleshooting 10.1 General errors Error Possible cause Corrective action   Displays remain blank after Power cord not plugged in. Plug the power cord into the wall outlet.   the oven is switched on at Building fuse blown. Check the building fuse and replace, as required.

  • Page 28: Controller Errors

    10.2 Controller errors Error Possible cause Corrective action ERR 1 Relay for heating is defect. Change power electronics Photo coupler for heating relay is defective. Change power electronics Detection circuit for photo coupler is damaged. (Hard- Change power electronics The relay for heating is not detected as „on“, even ware) Change control board and check flat...

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Magma 2300.0500

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