Control Techniques
Automation Repair
We repair Control Techniques drives at component level, from Unidrive SP and Unidrive M through to Commander, Mentor and Digitax units.
Every unit is assessed free of charge, repaired at component level in our Bolton workshop and returned fully tested with a 12-month warranty and test report.
- 24/7 emergency call-outs
- UK-wide service
- 12-month warranty
Control Techniques range we repair
Control Techniques is a manufacturer of industrial variable speed drives and motion control equipment used across manufacturing, processing, pumping, material handling and other industrial applications.
If your model is not listed, ask us. We repair current, obsolete and discontinued units.
How we help with Control Techniques:VFD RepairsServo Drive RepairDC Drive RepairRenewable Energy Equipment Repairs
Key features of our service
Common faults we repair
Unidrive, Commander and Mentor drives use letter trip codes rather than numbers. The trips below account for most Unidrive SP and Unidrive M repairs we take in.
- OI.AC – instantaneous output overcurrent (IGBT, motor cable, short circuit)
- OI.br – overcurrent in the braking resistor circuit
- It.AC – I²t overload on the drive output current
- OU – DC bus overvoltage (deceleration, regen, open braking resistor)
- UU – DC bus undervoltage (supply loss, rectifier, soft-start)
- PS – internal power supply failure on the control board
- dE – encoder or feedback interface trip
- th – motor thermistor trip
- Ph – input phase loss
- OHt – drive over-temperature (fan, heatsink, airflow)
Why repair rather than replace?
Replacing a failed Control Techniques drive can be expensive, particularly when the original model is obsolete or difficult to source. Repairing the existing drive can be a faster, more cost-effective solution while avoiding unnecessary replacement, reprogramming and commissioning.
- Repair is also the only option for obsolete and discontinued units, where a like-for-like replacement no longer exists. Where a repair is not economic, we say so and can supply a tested refurbished unit instead.
- Component-level diagnostics and repair, never board swapping
- Every repair covered by a 12-month warranty
- Free fault assessment and a quote within 24 hours of arrival
- In-house soak and load testing before your unit goes back
- All major brands and models, including obsolete and discontinued units
- 24/7 emergency call-outs for production-critical breakdowns
- Nationwide collection and delivery
- Fixed-price quotes agreed before any work starts
How it works
Free fault assessment by our engineers.
Fixed-price quote within 24 hours of your unit arriving.
Component-level repair, full functional test and burn-in.
Test report and 12-month warranty included.
No fix, no fee on standard and high-priority repairs.
Control Techniques repair questions
24/7 emergency call-outs
Production line down?
Call 0161 399 0042 for 24/7 emergency call-outs, or book a repair for a free fault assessment and a fixed-price quote within 24 hours of your unit arriving. 12-month warranty.