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9.2.1.10 Drive Speed Drops Sharply under Load
Possible Cause
Drive is running at current limit.
Drive is running with incorrect parameters.
Troubleshooting
Check the application.
Check the parameter settings.
9.2.1.11 Brake not Releasing
Possible Cause
Defective brake control.
Incorrect mechanical brake parameters.
Troubleshooting
Check the parameter settings.
Contact Danfoss.
9.2.1.12 Holding Brake not Holding the Servo Drive
Possible Cause
Mechanical brake defective.
Shaft load exceeds the holding torque of the brake.
Troubleshooting
Contact Danfoss.
9.2.1.13 Delayed Brake Engagement
Possible Cause
Software error.
Troubleshooting
Contact Danfoss.
9.2.1.14 Noises when Power-Off Brake is Engaged
Possible Cause
Mechanical brake damaged.
Troubleshooting
Contact Danfoss.
9.2.1.15 LEDs not Lighting Up
Possible Cause
No power supply.
Troubleshooting
Check the power supply.
9.2.1.16 Drive Protection Trips Immediately
Possible Cause
Short circuit.
Incorrect control loop parameters.
Troubleshooting
Check the wiring.
Contact Danfoss.
AQ262449648484en-000101 / 175R1135 | 157
Danfoss A/S © 2020.08
Diagnostics
VLT® Servo Drive System ISD 510/DSD 510
Operating Guide