A municipal water utility operated a Danfoss VLT HVAC FC 102 controlling a 75 HP pump. After a lightning storm nearby, the drive displayed Alarm 2563 every 2–6 hours.
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).
Note: Ensure you have a backup of your drive parameters via MCT 10 or saved to the LCP before doing this, as initialization wipes custom configurations. Step 5: Mitigate Electromagnetic Interference (EMI)
If Error 2563 , the internal control board safety circuit is damaged. 💡 Preventive Maintenance Strategies Danfoss Vlt Error Code 2563
If your Danfoss VLT drive displays code 2563, follow these steps in order: 1. Perform a Power Cycle Turn off the mains power supply.
Minimizing unexpected downtime caused by safety circuit faults requires a proactive approach to panel maintenance.
This is not a user-caused fault like a parameter typo; it is a hardware-firmware integrity fault. A municipal water utility operated a Danfoss VLT
Poor EMC protection can cause internal communication errors like 2563. 3. Initialize the Drive (Hard Reset)
: Schedule monthly or quarterly tests where the safety system is cycled. This exercises the mechanical contacts of safety relays, preventing them from oxidizing or sticking. ⚠️ Safety Warning
When this error trips, the drive will initiate a coast-to-stop command to protect both the internal inverter components and the connected motor. The control panel (LCP) will flash the red alarm light, and "Alarm 2563" or "Fault 2563" will display on the screen. Common Causes of Error Code 2563 Most Danfoss VLT alarms use a 1 or 2-digit format (e
If the drive is >10 years old and Error 2563 recurs weekly, replacement with a VLT FC-360 or new FC-302 is more economical than board-level repair.
Go to and Parameter 15-60 to 15-63 (Option Ident) .
Specifically, Error Code 2563 points to a between the drive's main control board and an fieldbus option card (such as PROFINET, EtherNet/IP, Modbus TCP, or PROFIBUS) or an extended I/O module. The control card expected a specific response or data packet from the module within a strict timeframe, but that response never arrived. 2. Common Causes of Error Code 2563