Mitsubishi FR-A800 Error Code E.IOH

Mitsubishi PLC & VFD Major Hardware

Model: FR-A800 | Code: E.IOH

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

Symptoms

Inrush current suppression circuit anomaly.

Possible Causes

  • Inrush suppression component failure
  • Thermal relay for inrush circuit
  • Internal circuit fault

Troubleshooting Steps

  1. Step 1: Check inrush suppression circuit
    Circuit functional
  2. Step 2: Verify inrush thermal relay
    Relay not tripped
  3. Step 3: Replace faulty component
    New component operates correctly

How to Reset

Reset via parameter unit after inrush circuit repair.

Related Mitsubishi Fault Codes

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Source: Mitsubishi FR-A800 Instruction Manual, Mitsubishi Electric

Category: PLC & VFD