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ErrorLib — Industrial Fault Code Library

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ALARM 80

Drive initialised to default value

Danfoss · VLT HVAC Basic FC 101

What does ALARM 80 mean?

The frequency converter's parameter settings have been reset to their factory default values, typically following a manual reset operation. This means all previous application-specific configurations are lost, and the drive will operate with generic settings.

Common Causes

  • User intentionally initiated a manual factory reset (e.g., via parameter P14-22 or specific button sequence).
  • Control card replaced or firmware updated, which often defaults parameters as part of the process.
  • Internal non-volatile memory error (e.g., EEPROM corruption), causing parameter loss and subsequent default loading.
  • Extended power loss to the control card's backup power, causing volatile memory loss (less common with modern drives).
  • Error during parameter upload/download via PC software, leading to a corrupt or incomplete parameter set.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm if a factory reset (e.g., P14-22 = 1 or 2) was intentionally performed or accidentally triggered.

  2. 2

    Reload the last known good parameter set from a backup (e.g., using LCP copy/paste function or PC software tool).

  3. 3

    Manually re-enter all necessary application-specific parameters, paying close attention to motor data (P1-20 to P1-25).

  4. 4

    After re-entering parameters, perform an Automatic Motor Adaptation (AMA) to optimize motor control.

  5. 5

    Check the control card's error log (if available) for any underlying internal faults that might have triggered the reset.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

10Motor overload temperature11Motor thermistor overtemperature13Overcurrent
Source: Danfoss VLT HVAC Basic FC 101
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