Danfoss Vlt Error Code 2563 -

Danfoss VLT drives use modular control cards. The standard control card (containing the main microprocessor and EEPROM) can develop faulty memory cells over time—especially in high-temperature environments (above 50°C / 122°F).

Note: Exact behavior depends on your specific VLT model (e.g., VLT HVAC Drive, VLT AQUA Drive, VLT AutomationDrive). In some models, 2563 is a warning only (W28); in others, it triggers a trip (T28). Check your operating guide.

Danfoss VLT Error Code 2563: Brake Resistor Shorted Danfoss Vlt Error Code 2563

Error code 2563 on a Danfoss VLT frequency converter indicates a specific hardware fault regarding the brake chopper and resistor circuit. The drive has detected a short circuit in the brake resistor or the cabling connected to the brake terminals.

Here is a detailed breakdown of the error, its causes, and how to troubleshoot it. Danfoss VLT drives use modular control cards

You should escalate the issue if:

Danfoss Technical Support (North America): +1-800-432-6367
Global support portal: my.danfoss.com Note: Exact behavior depends on your specific VLT model (e

| Fault Code | Name | Key Difference | |------------|--------------------|--------------------------------------------------| | 2563 | Parameter checksum | EEPROM data corruption – specific to parameter list | | 2560 | Internal fault | General microprocessor watchdog timeout | | 2561 | Power card EEPROM | Corrupted power module data (different memory area) | | 2564 | FIFO error | Communication buffer overflow (usually serial) | | 2500 | Control word timeout| Lost fieldbus connection – not memory related |