Schneider Electric · Altivar 312 Variable Frequency Drive
This error indicates that the remote display terminal has detected an internal Read-Only Memory (ROM) anomaly, typically identified by a checksum calculation failure. This points to a critical internal hardware malfunction within the display terminal's firmware storage. The terminal's basic functionality may be compromised.
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1. Perform a power cycle of the remote display unit by physically disconnecting it from the drive for at least 30 seconds and then reconnecting.
2. Ensure the remote display unit is operating within its specified environmental conditions (temperature, humidity); remove it from adverse conditions if identified.
3. If accessible, attempt to perform a factory reset of the remote display's settings via its menu options, which might re-initialize some memory sectors.
4. Check if any firmware update options are available for the remote display, as a re-flash could potentially restore corrupted ROM data (though often indicates hardware failure).
5. Given this is a critical internal hardware error, prepare for replacement of the remote display unit as the most probable resolution.