During the boot-up sequence, the drive may briefly display a firmware version or software ID, which could look like "2563".
Ensure the drive has been disconnected from power for at least 4 minutes (or as specified in the manual for your specific VLT model) to allow the DC link capacitors to discharge fully before working on the terminals.
is a serious internal fault indicating a checksum mismatch or corrupted power unit software. While a simple connector reseat or full firmware reflash cures a small percentage of cases, the overwhelming majority require power card replacement or drive exchange.
During the boot-up sequence, the drive may briefly display a firmware version or software ID, which could look like "2563".
Ensure the drive has been disconnected from power for at least 4 minutes (or as specified in the manual for your specific VLT model) to allow the DC link capacitors to discharge fully before working on the terminals.
is a serious internal fault indicating a checksum mismatch or corrupted power unit software. While a simple connector reseat or full firmware reflash cures a small percentage of cases, the overwhelming majority require power card replacement or drive exchange.