Graham
Drive Repair
Graham Drive Diagnostics, Repair & Industrial Support
Common Graham Applications
01.
Commercial HVAC
02.
Water
Systems
03.
Industrial
Plants
04.
Pump
Control
About Graham
Drive Systems
Graham drive systems have long been used in HVAC, water, and industrial motor-control applications where reliable speed control, energy efficiency, and system performance are essential.
Danfoss acquired Graham in 1995, and many legacy Graham and Danfoss Graham drives remain in service today. Control Concepts Dallas supports installed equipment used throughout commercial HVAC, water and wastewater facilities, pumping systems, and industrial environments.
Our technicians diagnose programming problems, electrical faults, cooling failures, control-board issues, and conditions involving connected motors or mechanical loads. We can also help determine whether repair, replacement, retrofit, or modernization is the most practical path forward.
Equipment we service includes:
01.
VLT 2800 Drives
02.
VLT 6000 HVAC Drives
03.
Legacy Graham VFDs
04.
Enclosed Drive & Bypass Systems
05.
Drive Control Boards
06.
Keypads & Power Components
Complete Automation Services
From troubleshooting and repair to ongoing automation support, our technicians help keep critical systems operating reliably.
Diagnostics
Repair
Automation Support
Common Graham Drive Symptoms
01.
Drive Will Not
Power Up
02.
Programming
Faults
03.
Connection
Faults
04.
Cooling Fan
Failures
05.
Overcurrent
Trips
06.
Motor Will
Not Run
The Repair Process
When a Graham drive system develops a problem, Control Concepts Dallas evaluates the equipment and surrounding operating conditions to determine whether the issue originates within the drive or elsewhere in the application.
Our technicians review incoming power, fault history, drive parameters, electrical connections, cooling components, communication systems, connected motors, and mechanical loads. Before applying power, the drive and its power sections are inspected and tested, existing parameters are backed up when possible, and operation is verified through controlled power-up and functional testing.
Once the cause is identified, we determine whether repair, replacement, retrofit, or modernization is the most practical solution.
Most drive failures can be avoided through preventative maintenance.
