Danfoss VLT Midi Drive FC 280

Other manuals for Danfoss VLT Midi Drive FC 280

Programming Guide144 pages

Design Guide92 pages

Instruction Manual68 pages

Installation Guide96 pages

Operating Instructions66 pages

Installation Instructions4 pages

Questions and Answers:

T
Thomas SullivanAug 13, 2025
What to do if open power fuses or circuit breaker trip in Danfoss VLT Midi Drive FC 280?
- A
  Angela HoustonAug 13, 2025
  If the power fuses are open or the circuit breaker trips, it could be due to a phase-to-phase short. In this case, eliminate any shorts detected. Another cause may be motor overload. To resolve this, perform the start-up test and verify that the motor current is within specifications. If the motor current exceeds the nameplate full load current, the motor may need to run with a reduced load. Finally, loose connections can cause this issue, so tighten any loose connections you find.
C
Corey Porter Jr.Aug 17, 2025
Why is the motor not running on my Danfoss DC Drives?
- Q
  qdavisAug 17, 2025
  If the motor is not running, it might be due to the LCP stop. To resolve this, press [Auto On] or [Hand On], depending on the operating mode. Another possible cause is a missing start signal. Apply a valid start signal to start the motor. The motor coast signal might also be active, so apply 24 V on terminal 27 or program this terminal to [0] No operation. Finally, the reference signal source could be incorrect; program the correct settings, set the preset reference active in parameter group 3-1* References, check for correct wiring, check the scaling of terminals, and verify the reference signal.
L
Laurie RosalesAug 20, 2025
What causes line power current imbalance in Danfoss VLT Midi Drive FC 280 DC Drives?
- T
  Timothy LuceroAug 20, 2025
  If the line power current imbalance is greater than 3%, it could be a problem with the line power, such as a mains phase loss. Rotate the input power leads into the adjustable frequency drive one position: A to B, B to C, C to A. Another possible cause is a problem with the adjustable frequency drive unit itself. Rotate the input power leads into the adjustable frequency drive one position: A to B, B to C, C to A.
M
mbellAug 25, 2025
Why is there motor current imbalance in my Danfoss VLT Midi Drive FC 280 DC Drives?
- E
  Elizabeth CrossAug 25, 2025
  If the motor current imbalance is greater than 3%, it could be due to a problem with the motor or its wiring. To resolve this, rotate the output motor leads one position: U to V, V to W, W to U. Alternatively, the issue might stem from the adjustable frequency drive unit itself. In this case, rotate the output motor leads one position: U to V, V to W, W to U.
V
Victoria ComptonAug 28, 2025
Why motor does not brake with Danfoss VLT Midi Drive FC 280?
- G
  gloria28Aug 28, 2025
  If the motor does not brake, it could be due to incorrect settings in the brake parameters or ramp-down times that are too short. Check parameter group 2-0* DC brake and 3-0* Reference limits.
C
Carlos BellSep 1, 2025
What causes unstable motor speed in Danfoss VLT Midi Drive FC 280?
- T
  Taylor WarnerSep 1, 2025
  If the motor speed is unstable, it may be due to incorrect parameter settings. You should check the settings in parameter group 6- ** Analog I/O mode.
C
cynthiacarrollSep 4, 2025
What to do with acoustic noise or vibration in Danfoss VLT Midi Drive FC 280?
- R
  rosemichaelSep 4, 2025
  If you notice acoustic noise or vibration, for example, a fan blade making noise or vibrations at certain frequencies, it may be caused by resonances in the motor/fan system. Another cause may be overmodulation; increase resonance damping in parameter 1-64 Resonance Dampening.
M
Maria Anderson DVMSep 8, 2025
What causes rough motor operation in Danfoss DC Drives?
- K
  Kara PierceSep 8, 2025
  If the motor runs roughly, it could be due to overmagnetization. Check the motor settings in parameter groups 1-2* Motor data, 1-3* Adv motor data and 1-5* Load indep. setting.

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English

Summary

2 Safety

2.1 Safety Symbols

Explains the meaning of warning, caution, and notice symbols used throughout the document.

2.2 Qualified Personnel

Defines the qualifications required for personnel handling the frequency converter.

2.3 Safety Precautions

Details crucial safety warnings and precautions for operating the equipment.

4 Electrical Installation

4.1 Safety Instructions

Highlights critical safety warnings related to electrical installation, including induced voltage and shock hazards.

4.3 Grounding

Details the proper grounding procedures for electrical safety and EMC compliance.

4.4 Wiring Schematic

4.6 Motor Connection

Explains the procedure for connecting the motor to the frequency converter, including safety warnings.

4.7 AC Mains Connection

Details the steps for connecting the AC mains power supply to the frequency converter.

4.8 Control Wiring

4.8.3 Enabling Motor Operation (Terminal 27)

4.8.4 Mechanical Brake Control

4.9 Installation Checklist

5 Commissioning

5.1 Safety Instructions

Emphasizes safety precautions before applying power and during commissioning.

5.2 Applying Power

Outlines the procedure for safely applying power to the frequency converter.

5.3 Local Control Panel Operation

5.3.1 Numeric Local Control Panel (NLCP)

5.3.2 The Right-key Function on NLCP

5.3.3 Quick Menu on NLCP

5.3.4 Main Menu on NLCP

5.3.5 Graphic Local Control Panel (GLCP)

5.3.6 Parameter Settings

5.3.7 Changing Parameter Settings with GLCP

5.3.9 Restoring Default Settings with LCP

5.4 Basic Programming

Covers fundamental steps for programming the frequency converter.

5.4.1 Asynchronous Motor Set-up

Guides on setting up asynchronous motors using nameplate data.

5.4.2 PM Motor Set-up in VVC+

Explains how to configure PM motors specifically for VVC+ control mode.

5.5 Checking Motor Rotation

5.6 Checking Encoder Rotation

5.7 Local-control Test

5.8 System Start-up

Outlines the recommended procedure for the initial system start-up after setup.

6 Safe Torque Off (STO)

6.1 Safety Precautions for STO

Emphasizes safety measures and personnel qualifications for STO installation.

6.2 Safe Torque Off Installation

Provides instructions for installing the integrated Safe Torque Off function.

6.3 STO Commissioning

Covers the essential steps for commissioning the STO function to ensure safety.

6.3.1 Activation of Safe Torque Off

Explains how to activate the STO function, which stops motor rotation for safety.

6.3.2 Deactivation of Safe Torque Off

Describes the procedure for deactivating STO and resuming normal operation.

6.3.3 STO Commissioning Test

Details the mandatory testing required after STO installation or modification.

6.3.4 Test for STO Applications in Manual Restart Mode

Provides specific test steps for STO when manual restart is configured.

6.3.5 Test for STO Applications in Automatic Restart Mode

Provides specific test steps for STO when automatic restart is configured.

6.4 Maintenance and Service for STO

6.5 STO Technical Data

8 Maintenance, Diagnostics, and Troubleshooting

8.1 Maintenance and Service

8.2 Warning and Alarm Types

Classifies different types of warnings and alarms generated by the frequency converter.

8.3 Warning and Alarm Display

Explains how warnings and alarms are displayed on the control panel and via indicator lights.

8.4 List of Warnings and Alarms

Provides a comprehensive list of all possible warnings, alarms, and trip lock conditions with their causes.

8.4.1 Warning and Alarm Code List

Lists specific codes for warnings and alarms, detailing their description and causes.

8.5 Troubleshooting

Offers solutions for common problems encountered during operation and installation.

9 Specifications

9.1 Electrical Data

9.3 Motor Output and Motor Data

9.6 Control InputOutput and Control Data

9.7 Connection Tightening Torques

9.8 Fuses and Circuit Breakers

9.9 Enclosure Sizes, Power Ratings, and Dimensions

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