F102 Fuse Blowing on E7L, E7N or E7B with the Electronic Bypass Units
Topic Description

The F102 fuse (0.25A) on the bypass control board in E7L, E7N Bypass  or E7B with the electronic bypass boards will blow under the following conditions:

  • Excessive current draw on the digital input terminals.
  • User-supplied voltage is being applied to the digital input terminals when using the internal supply 120VAC logic.
  • The bypass control board is defective.
Picture Diagram
   

Resolution
Follow the steps below when troubleshooting the F102 fuse blowing on the E7L and E7N bypass control board:
  1. Remove power to the unit.
    • Caution: It is recommended to verify 10VDC or less is present on the DC bus before performing any service work.
  2. Install a new F102 fuse (if necessary).
  3. Remove all control wiring landed on the bypass control board.
  4. Verify the J1 jumper is set on pins #1 and #2.
  5. Apply power to the unit.
    • If the F102 fuse blows again, then the bypass control board will need to be replaced.
    • If the F102 fuse does NOT blow, then verify all control wiring is correct.
      • Note: The 120VAC supplied on the digital inputs is NOT for use with external devices.

Product Types
E7B Bypass, E7BR, E7BR Bypass Nema 3R, E7L Bypass, E7N Bypass,
All Applications
Advanced Random Rotary Knife with Cam Blend, Air Compressor, Blister pack Thermoformer, Cartoner, Centrifuge, Conveyor, Crane/Hoist, Dynamometer, Elevators and Escalators, Extrusion, Fans/Blowers, Feed To Length, General Machinery, HVAC, Irrigation, Labeler, Laundry, Linear Flying Shear, Machine Tool, Mixer, Other, Packaging, Palletizer, Precision Grinding, Pump, Punch Press, Rotary Knife, Rotary Placer, Rotary Table Indexer, Screw Feeder, Semiconductor, Solar Cell Tabbing and Bussing, Solar - Textured Etching, Synch-Belt, Textile, Winding,
Last Modified Date: 07-22-2024ID: 13040