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ErrorLib — Industrial Fault Code Library

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1796

RAM copy error

Danfoss · VLT AutomationDrive FC 301/302

What does 1796 mean?

An error occurred during the copying of data in RAM (Random Access Memory). This suggests a memory integrity problem or a transient issue within the drive's internal data handling.

Common Causes

  • Transient power interruption or sag affecting RAM during a write cycle.
  • Faulty RAM chip or memory controller on the main control board.
  • Software attempting to write to an invalid or protected memory address.
  • Overheating of the memory components leading to data corruption.
  • Electromagnetic interference (EMI) affecting the RAM data bus or control signals.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the drive by disconnecting mains voltage (L1, L2, L3) for at least 60 seconds.

  2. 2

    Verify the stability of the internal 3.3VDC and 5VDC power supplies feeding the memory ICs.

  3. 3

    Update the drive firmware to the latest available version to address potential memory management bugs.

  4. 4

    Perform a factory reset via Parameter P14-22 (Reset options) set to 2 (Load LCP defaults) to clear corrupted memory states.

  5. 5

    Ensure proper cooling and verify ambient temperature within the control cabinet is within specified limits.

Browse all codes in this manual (66)
Verified technical data. Last updated: April 2026

Related Faults

#14Earth (ground) fault#32Motor phase W missing#36Mains failure
Source: Danfoss VLT AutomationDrive FC 301/302
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