Delta MS300 Error Code E05

Delta PLC & VFD Major System

Model: MS300 | Code: E05

Applicable Systems
DVP AH500 AS300 C2000 MS300

Symptoms

The drive trips. The keypad displays E05, indicating an EEPROM fault. The internal EEPROM memory has failed a read or write operation, or the stored data is corrupted.

Possible Causes

  • EEPROM hardware failure due to aging or electrical damage
  • EEPROM write operation interrupted by power loss
  • Electrostatic discharge damaged the EEPROM
  • Firmware bug caused invalid EEPROM write

Troubleshooting Steps

  1. Step 1: Power cycle the drive to see if the fault clears on reboot
    Fault may clear if the corruption was transient
  2. Step 2: If the fault persists, attempt to reset parameters to factory defaults
    Factory reset may clear corrupted EEPROM data
  3. Step 3: Re-download all parameters from the engineering software
    Parameters download successfully after factory reset
  4. Step 4: If the fault persists after factory reset, the EEPROM hardware is damaged
    Drive needs replacement or service

How to Reset

To reset: 1) Power cycle the drive. 2) Try a factory parameter reset. 3) Re-download all parameters. 4) If the fault persists, the EEPROM is permanently damaged. Contact Delta service. Caution: EEPROM failures may indicate the drive is reaching end of life.

Frequently Asked Questions

  • Q: What is EEPROM and why does it matter?

    EEPROM (Electrically Erasable Programmable Read-Only Memory) stores the drive's parameters and configuration. If it fails, the drive cannot read its configuration and cannot operate correctly.

  • Q: Can I recover from an EEPROM fault?

    If the fault is caused by data corruption, a factory reset and parameter re-download may fix it. If the EEPROM hardware itself is damaged, the drive must be replaced or serviced by Delta.

Related Delta Fault Codes

Source: Delta MS300 Series User Manual, 2023

Category: PLC & VFD