: The most frequent cause for a 2500+ series error is a failure on the power board, which may require replacement.
When a VLT drive enters a braking state (decelerating a load quickly), it pumps excess energy generated by the motor back into the DC bus. To prevent overvoltage, this energy is diverted to a brake resistor to be burned off as heat. Error 2563 triggers when the drive measures the resistance of the connected brake resistor and finds it is significantly lower than the calculated or expected value, or effectively zero ohms. Danfoss Vlt Error Code 2563
This is not a user-caused fault like a parameter typo; it is a hardware-firmware integrity fault. : The most frequent cause for a 2500+
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. Error 2563 triggers when the drive measures the
This error is almost always caused by a physical issue in the braking circuit. Common causes include: