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ErrorLib — Industrial Fault Code Library

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E.PE

Parameter storage device alarm

Mitsubishi Electric · A500 Inverter

What does E.PE mean?

This function stops the inverter output if a fault occurs in the E2PROM device responsible for storing parameter settings. This issue might be related to an excessive number of write operations to the memory device, which can degrade its integrity.

Common Causes

  • The non-volatile memory used for parameter storage is faulty.
  • Attempted to write invalid data to the parameter storage.
  • Power interruption during parameter writing operation.
  • Wear or failure of the flash memory chip.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review the number of parameter write operations; frequent writes can degrade the E2PROM device.

Browse all codes in this manual (21)
Verified technical data. Last updated: April 2026

Related Faults

E.1 to E.3Option faultE.BEBrake transistor alarm detectionE.CPUCPU error
Source: Mitsubishi Electric A500 Inverter
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