Danfoss VLT® Micro Drive FC-51 Instruction Manual

1. Introduction

The Danfoss VLT® Micro Drive FC-51 is a versatile and compact frequency converter designed for controlling AC motors up to 22.0 kW. This drive, model FC-051P1K5S2E20H3BXCXXXSXXX, is engineered for strength and reliability, making it suitable for a wide range of general-purpose applications. It operates on a single-phase 200 - 240 VAC power supply and features an IP20 enclosure, indicating protection against solid objects larger than 12.5mm, but no protection against water.

Manufactured with environmental responsibility in mind, the VLT Micro Drive complies with the RoHS Directive. This manual provides essential information for the proper setup, operation, and maintenance of your Danfoss VLT® Micro Drive FC-51.

2. Setup and Installation

Proper installation is crucial for the safe and efficient operation of the VLT® Micro Drive. Always ensure power is disconnected before beginning any installation procedures.

• Mounting: Mount the drive in a vertical position on a flat, stable surface, ensuring adequate ventilation space around the unit for heat dissipation.
• Power Connection: Connect the single-phase 200 - 240 VAC power supply to the designated terminals. Verify correct voltage and phase before applying power.
• Motor Connection: Connect the AC motor to the drive's output terminals. Ensure proper wiring for motor rotation direction.
• Grounding: Always connect the drive to a proper earth ground to ensure safety and prevent electrical interference.
• Control Panel (LCP): The Local Control Panel (LCP) display is an accessory and must be ordered separately. Once acquired, it can be easily installed on the front of the drive for local control and monitoring.
• Environmental Considerations: The drive has an IP20 rating, meaning it is protected against solid objects but not water. Install in a dry environment free from excessive dust, moisture, and corrosive gases.

Figure 2.1: Front view of the Danfoss VLT Micro Drive FC-51. This image displays the front of the Danfoss VLT Micro Drive FC-51, highlighting its control panel. The panel features a display screen, navigation buttons including Menu, Status, Quick Menu, Main Menu, On, Warn, Alarm, Hand On, Off Reset, Auto On, and a central OK button with directional arrows. A rotary knob is also visible on the right side of the panel. The top section of the drive shows ventilation fins and a label with product information.

3. Operating Instructions

The VLT® Micro Drive FC-51 is designed for user-friendly operation, primarily through its Local Control Panel (LCP) or via external control signals.

• Power On: Once properly installed and wired, apply power to the drive. The display on the LCP (if installed) will illuminate.
• Navigation: Use the directional arrow buttons (Up, Down, Left, Right) and the OK button to navigate through menus and confirm selections.
• Menu Access:
  • Menu Button: Access the main menu structure for parameter settings and configuration.
  • Quick Menu: Provides quick access to frequently used parameters.
  • Main Menu: Offers a comprehensive overview of all available parameters.
• Operation Modes:
  • Hand On: Activates manual operation mode, allowing direct control from the LCP.
  • Auto On: Activates automatic operation mode, where the drive responds to external control signals (e.g., from a PLC).
  • Off/Reset: Stops the drive and can be used to reset alarms.
• Status Indicators:
  • Status: Indicates the current operational state of the drive.
  • On: Illuminates when the drive is running.
  • Warn: Indicates a warning condition that may require attention but does not stop the drive.
  • Alarm: Indicates a fault condition that has stopped the drive. Refer to the troubleshooting section for alarm codes.
• Parameter Adjustment: Use the rotary knob (if present on your LCP model) or the Up/Down arrows to adjust parameter values. Press OK to confirm changes.

4. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your Danfoss VLT® Micro Drive FC-51. Always disconnect power before performing any maintenance.

• Cleaning: Periodically clean the exterior of the drive using a soft, dry cloth. Do not use liquid cleaners or solvents. Ensure ventilation openings are free from dust and debris to maintain proper airflow.
• Inspection: Regularly inspect the drive for any signs of physical damage, loose connections, or discoloration. Check that all cables are securely fastened.
• Environmental Check: Verify that the operating environment remains within the specified conditions (temperature, humidity, dust levels) to prevent premature wear or failure.
• Fan Check: If your model includes a cooling fan, ensure it is operating correctly and is free from obstructions.

For internal maintenance or repairs, it is recommended to contact qualified service personnel.

5. Troubleshooting

This section provides general guidance for common issues. For detailed troubleshooting, refer to the comprehensive Danfoss VLT® Micro Drive FC-51 technical manual.

If the problem persists after attempting these solutions, or if you encounter an alarm code not listed, please contact Danfoss technical support.

6. Specifications

Key technical specifications for the Danfoss VLT® Micro Drive FC-51 (Model: FC-051P1K5S2E20H3BXCXXXSXXX).

• Product Model: VLT Micro Drive FC-51
• Full Model Code: FC-051P1K5S2E20H3BXCXXXSXXX
• Power Rating: 1.5 KW / 2.0 HP
• Current Rating: 6.8A
• Input Voltage: Single phase 200 - 240 VAC
• Enclosure Rating: IP20 / Chassis (Protection against solid objects >12.5mm)
• RFI Filter: Class A1/B (C1)
• Brake Chopper: No
• Control Panel: Local Control Panel (LCP) not included, order separately.
• PCB Coating: Coated PCB
• Product Dimensions: 6.91 x 2.95 x 6.93 inches
• Manufacturer: Danfoss
• ASIN: B087PQGJM7
• Date First Available: August 30, 2022

7. Warranty and Support

Specific warranty terms and conditions for the Danfoss VLT® Micro Drive FC-51 are not provided within this document. For detailed warranty information, including coverage period and claims procedures, please refer to the official documentation supplied with your product or visit the official Danfoss website.

For technical support, service, or further inquiries regarding your VLT® Micro Drive, please contact Danfoss customer service or your authorized Danfoss distributor. You can typically find contact information on the official Danfoss website:

Visit Danfoss Official Website