Option Fault / Internal Contact Failure

What does E.1 mean?

The inverter output is shut off due to a contact failure between the inverter and a plug-in option, or if a manufacturer setting switch on the plug-in option has been altered. Excessive electrical noise around the inverter can also contribute to this fault. This compromises the functionality of the plug-in option.

• Loose or improperly seated plug-in option board (e.g., communication card, I/O card) causing intermittent contact.
• Manufacturer setting switch (DIP switch) on the option board altered from default or required position.
• Excessive electromagnetic interference (EMI) or radio frequency interference (RFI) affecting the internal communication bus.
• Damaged connector pins on either the inverter's option slot or the plug-in option board.
• Faulty internal circuit on the plug-in option board.

Click steps to track your progress.

1. 1

   Power down the inverter and physically re-seat the plug-in option board firmly into its slot.

2. 2

   Verify the position of all manufacturer setting switches (DIP switches) on the option board against the option board's instruction manual.

3. 3

   Inspect the option board connector pins and the inverter's option slot for any signs of damage, bending, or foreign material.

4. 4

   Check for proper grounding of the inverter chassis and all connected external equipment, ensuring ground resistance is below 1 Ohm.

5. 5

   Route control wiring (e.g., communication cables) separately from power wiring (e.g., motor cables) by at least 30 cm to reduce EMI.