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E.OP1 to E.OP3

Communication option fault

Mitsubishi Electric · FR-A800 Variable Speed Drive (Separated Converter)

What does E.OP1 to E.OP3 mean?

These faults indicate an issue with one of the communication option cards installed in the FR-A800/A800 Plus Series drive (E.OP1 for connector 1, E.OP2 for connector 2, E.OP3 for connector 3). The drive detects a problem with the option, leading to a protective shutoff.

Common Causes

  • Communication option card not properly seated or loose in its connector.
  • Communication option card is faulty or incompatible with the FR-A800/A800 Plus Series drive.
  • Damaged communication cable or incorrect wiring to the option card.
  • Incorrect parameter settings for the specific communication option (e.g., network address, baud rate).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the physical installation of the communication option card(s) corresponding to the fault (e.g., connector 1 for E.OP1). Ensure secure seating in the connector.

  2. 2

    Verify the compatibility of the communication option card with the FR-A800/A800 Plus Series drive model.

  3. 3

    Inspect the communication cable connected to the option card for damage or incorrect wiring (e.g., open circuits, short circuits).

  4. 4

    Review the parameters specific to the communication option (e.g., network address, baud rate) and ensure they are correctly configured according to the network requirements.

  5. 5

    If multiple communication options are present, try disabling or removing one at a time to isolate the problematic card.

Browse all codes in this manual (46)
Verified technical data. Last updated: April 2026

Related Faults

ALM4Output Short-Circuit DetectionE. 1Option FaultE. 13Internal Circuit Fault
Source: Mitsubishi Electric FR-A800 Variable Speed Drive (Separated Converter)
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