Mitsubishi FR-A800 Error Code E.OC2

Mitsubishi PLC & VFD Critical Overcurrent

Model: FR-A800 | Code: E.OC2

Applicable Systems
MELSEC FX3U MELSEC FX5U FR-A800 FR-A700 MR-J4 iQ-R Motion Controller (R32MTCPU/R16MTCPU)

Symptoms

Overcurrent during constant speed operation.

Possible Causes

  • Sudden load change
  • Motor cable short
  • Output IGBT fault

Troubleshooting Steps

  1. Step 1: Check for load surges
    No sudden load changes
  2. Step 2: Inspect motor cable
    Insulation intact
  3. Step 3: Test IGBT output
    All IGBTs switching correctly

How to Reset

Reset via parameter unit after resolving overcurrent.

Related Mitsubishi Fault Codes

Source: Mitsubishi FR-A800 Instruction Manual, Mitsubishi Electric

Category: PLC & VFD