VFDs, soft starters and motor control systems are critical to pumps, fans, conveyors, process equipment and utility systems. When they become unreliable, maintenance teams can spend hours chasing symptoms instead of solving the root cause.
The drive trips without a clear operating pattern
Intermittent VFD trips can be caused by load conditions, motor issues, cabling, cooling, parameter settings, control signals or incoming supply problems.
The first step is to understand when the fault happens and what changed recently on the site.
A structured electrical check can separate a drive problem from a motor, load or field wiring problem.
The motor is running hotter than expected
Heat can point to overload, poor ventilation, incorrect control setup, cable issues, bearing or mechanical load problems, or a motor that is no longer suited to the application.
Electrical checks should be combined with the maintenance team’s knowledge of the process and equipment history.
Motor controls should be treated as part of the asset, not as isolated components.
Starts, stops and speed control are unreliable
Unreliable start commands, missing speed references or inconsistent enable signals can cause production frustration.
The problem may sit in the control panel, PLC, field wiring, interlocks, local controls or drive setup.
Clear terminal labelling and updated drawings make these problems much faster to diagnose.
The equipment is obsolete or hard to support
Older drives and control gear can become difficult to source, repair or integrate with current systems.
A planned upgrade gives the site time to choose equipment, update wiring, check protection and schedule installation without waiting for a breakdown.
Ultima Power supplies and installs VFDs, electric motors and motor control equipment for Perth industrial sites that want reliable, maintainable outcomes.
Relevant Ultima Power services
This article supports the wider industrial and commercial electrical service content on the Ultima Power website. For related service information, use the links below.
- VFD supply and installation Perth
- Electric motor supply and installation Perth
- Motor control centres Perth
- Industrial electrical fault finding Perth
FAQs
Can a failed VFD be replaced like-for-like?
Sometimes, but the motor, load, protection, ventilation, cabling and control requirements should be reviewed before replacement.
Can VFD faults be caused by the motor?
Yes. A drive trip can be caused by motor condition, cable condition, load behaviour, supply issues or control wiring, not only the VFD itself.
Is it worth planning VFD upgrades before failure?
For critical assets, yes. Planned replacement usually creates less downtime than emergency replacement after a failure.
Contact Ultima Power for VFD, electric motor and motor control support in Perth, WA.