What to do if Danfoss VLT AutomationDrive FC 361 DC Drives show DC overvoltage?
If the DC-link voltage exceeds the limit, the drive trips after a certain time. To resolve this, connect a brake resistor, extend the ramp time, change the ramp type, activate the functions in parameter 2-10 Brake Function, or increase parameter 14-26 Trip Delay at Inverter Fault.
What causes Danfoss DC Drives to show inverter overload?
The drive may show an inverter overload if it has run with more than 100% overload for too long. To address this, compare the output current shown on the LCP with the drive rated current, compare the output current shown on the LCP with the measured motor current, and monitor the thermal drive load on the LCP.
What to do if Danfoss VLT AutomationDrive FC 361 DC Drives show mains phase loss?
If there is a mains phase loss, it means a phase is missing on the supply side, or the mains voltage imbalance is too high. Check the supply voltage and supply currents to the drive to resolve this issue.
What to do if Danfoss DC Drives display a live zero error?
A live zero error can be caused by broken wiring or a faulty device sending the signal. Check connections on all analog mains terminals, ensure that the drive programming and switch settings match the analog signal type, and perform an input terminal signal test.
What does it mean when Danfoss VLT AutomationDrive FC 361 display earth (ground) fault?
An earth (ground) fault indicates current from the output phase to ground, either in the cable between the drive and the motor, or in the motor itself. Remove power to the drive and repair the ground fault. Check for ground faults in the motor by measuring the resistance to ground of the motor cables and the motor with a megohmmeter.
What to do if Danfoss DC Drives show DC under voltage?
If the DC-link voltage drops below the undervoltage limit, the drive checks for 24 V DC back-up supply. Check that the supply voltage matches the drive voltage, perform an input voltage test, and perform a soft-charge circuit test.
Why Danfoss DC Drives display a current limit warning?
The current limit warning appears when the current is higher than the value in parameter 4-18 Current Limit. Ensure that the motor data in parameters 1-20 to 1-25 is set correctly. Increase the current limit if necessary, ensuring that the system can operate safely at a higher limit.
How to fix a 10 Volts low warning on Danfoss VLT AutomationDrive FC 361?
A short circuit in a connected potentiometer or incorrect wiring of the potentiometer can cause the '10 Volts low' warning. Remove the wiring from terminal 50. If the warning clears, the problem is with the wiring. If the warning does not clear, replace the control card.
What causes a phase imbalance alarm in Danfoss VLT AutomationDrive FC 361 DC Drives?
A phase imbalance alarm indicates a current imbalance between the power units. To fix this, check the power connections and ensure all phases are properly connected.
What causes a control word timeout warning on Danfoss DC Drives?
A control word timeout warning indicates there is no communication to the drive. Check the connections on the serial communication cable, increase parameter 8-03 Control Word Timeout Time, check the operation of the communication equipment, and verify that proper EMC installation was performed.
Explains the guide's purpose for safe installation and commissioning of VLT drives.
Groups safety symbols, personnel qualifications, and key precautions like high voltage.
Covers hazards related to rotating parts, unintended motor rotation, and hot surfaces.
Covers electrical safety instructions and EMC-compliant installation guidelines.
Details wiring schematic, connecting to ground, motor, and AC mains.
Covers applying power safely, unintended starts, and missing signals.
Covers pre-startup tests like motor rotation and system start-up.
Explains status messages, warning/alarm types, and lists common issues.
Provides steps for diagnosing and resolving various operational problems.
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