Danfoss Vlt Error Code 2563 < ESSENTIAL | 2024 >

Follow this structured diagnostic guide to isolate and resolve the root cause of Danfoss VLT Error Code 2563.

If your Danfoss VFD displays this code, follow these steps to diagnose and potentially resolve the issue:

Danfoss provides a set of documented internal fault codes that are associated with Alarm 38. These codes, which include ranges like 0, 256-258, 512-519, 783, and 1024-1284, are directly referenced in the official troubleshooting manuals for Danfoss VLT FC series drives. However, the specific code within these common ranges, which suggests it might be a more advanced or reserved code not covered in standard documentation or that it could be unique to a very specific hardware or firmware configuration.

Initialization to Default Settings | VLT® HVAC Drive FC 102 Danfoss Vlt Error Code 2563

Always turn off the main power supply and wait for the DC link capacitors to discharge (typically 15–20 minutes, depending on the drive size) before touching any terminals.

Cycle power to the drive and press the “Reset” key to clear the alarm. Design Guide VLT HVAC Basic Drive FC 101 - REMAK

By methodically working through the diagnosis—from a full power-cycle to physical inspections of IGBTs and internal components—you can quickly determine the root cause. Proactive maintenance and advanced monitoring can reduce the likelihood of such a critical alarm, ensuring the long-term performance and uptime of your equipment. Follow this structured diagnostic guide to isolate and

Codes beginning with "25" typically relate to failures in the initialization of the power card or a mismatch in firmware versions between the control and power stages. Øwre-Johnsen Recommended Troubleshooting Steps

: Faults in the ECM's signal processing or outdated software calibrations. Recommended Troubleshooting Steps

: Occasionally, a software-level conflict within the drive's operating system can misinterpret internal data as a measurement error. Troubleshooting Steps for Error 2563 However, the specific code within these common ranges,

To determine if the fault is external or internal to the drive:

In some Danfoss VLT design guides, "2563" is listed as a specification value for certain drive models, such as current ratings or technical data indices for 400 V 15 kW units.

There is no standard "Error Code 2563" listed in official manuals for common series like the FC 101, FC 102, or FC 302. Most Danfoss VLT alarms use a 1 or 2-digit format (e.g., Alarm 13 for Overcurrent).

: Disconnect the mains power supply completely. Wait for the display to turn off entirely (at least 4–15 minutes depending on the model to allow capacitors to discharge) before reconnecting.

Run the drive with the motor disconnected. If the alarm persists immediately upon starting, it is highly likely that the internal sensors or IGBTs are damaged. Solutions and Troubleshooting