Control Concepts is committed to delivering exceptional service and support for Graham Drives, now a part of Danfoss under the Danfoss Graham name.

Control Concepts provides 24/7 service and support. Contact us today.

Who is Graham?

Graham Drives, now Danfoss Graham, has a rich history of innovation in drive technology, particularly in the HVAC and wastewater sectors. With the acquisition by Danfoss, Graham Drives has expanded its reach and capabilities, continuing to serve as a trusted name in drive solutions for complex applications.

What Do Graham Drives Do?

Graham Drives are engineered to provide efficient and reliable control in HVAC systems and wastewater management, offering:

  • VLT® 2800 Drives: Equipped with features necessary for sophisticated HVAC installations, including adjustable carrier frequencies and automatic temperature compensation.
  • VLT® 6000 HVAC Drives: Designed for optimal performance in HVAC applications, with user-friendly interfaces and advanced control features.

Control Concepts has extensive experience in the repair, service, and support of Graham products.

Graham Drives Products We Service

Control Concepts services a broad spectrum of Graham Drives products, focusing on:

  • VLT® 2800 Drives
  • VLT® 6000 HVAC Drives
  • And More...

Industries Using Graham Drives

Graham Drives are used across various sectors, demonstrating their versatility and effectiveness:

  • HVAC: Enhancing efficiency and control in heating, ventilation, and air conditioning systems.
  • Wastewater Management: Providing reliable solutions for managing and treating wastewater.

Graham Drives are designed for straightforward operation and minimal setup time, making them adaptable to a wide range of industrial scenarios.

Don't see your product line listed here? Contact us and ask about our drive service and support.

Graham Drive Repair Services

Control Concepts offers comprehensive repair and maintenance services for Graham Drives, including:

  • Repair and Refurbishment: Specializing in Graham drives to ensure efficient and effective operation.
  • Preventive Maintenance and Diagnostics: Conducting regular checks to prolong the lifespan of your equipment.
  • Component Replacement: Utilizing high-quality parts for optimal functionality.
  • On-site Support and Troubleshooting: Providing direct assistance at your facility to address operational challenges.

Common Drive Failures

Common drive issues include:

  • Software or programming problems
  • Non-functional cooling fans
  • Loose connections
  • Drive keeps blowing fuses or tripping breakers
  • Drive doesn’t run motor
  • Circuit board failure

Over-current faults are a common cause of drive shutdowns, necessitating a detailed examination starting from motor dynamics.

The Control Concepts Repair Process

Our repair process encompasses:

  • Thorough inspection of the drive and terminals.
  • Comprehensive tests before powering the unit to prevent further damage.
  • Diode and IGBT tests on the input/output power sections.
  • Powering up the unit and performing amp readings and output frequency tests.
  • Using the drive to run a motor through basic jog functions after backing up existing programs.
For expert Graham drive repair and maintenance services, contact Control Concepts. We provide 24/7 service and support.