An overheating elevator drive is usually a ventilation, load or tuning problem, not just a hot machine room. Check airflow and load first, then tuning and duty, before assuming the drive itself has failed.
What an Overheating Elevator Drive Means
An overheating drive shows up as over-temperature trips and, over time, heat damage. A drive that runs its fans constantly is a warning sign: the replacement article lists heat, noise and smell as an end-of-life sign.
Why Heat Matters
Heat shortens electronics life and causes trips at the worst time. Repeated heat trips also mask the real fault if the drive is simply reset.
When to Investigate
Investigate after the first repeated heat trip, not after a season of resets. Check before summer and after any traffic or load change in the building.
Where Heat Builds Up
Check machine room ventilation, cabinet airflow, and the drive’s own heatsink and fan path.
How to Check and Prevent an Overheating Elevator Drive
- Record when trips happen (time of day, load, floor pattern) instead of resetting and forgetting.
- Check machine-room ventilation and cabinet airflow, and clear blocked heatsinks and filters.
- Check the motor load against the drive rating, using the 11LIFT range as the site reference where fitted (2.2-37kW, 380-440V class, with SVC 0.5Hz 180% and FVC 0Hz 200% starting torque figures from its manual).
- Check tuning: poor levelling or hunting under load raises current and heat.
- Check duty: a drive sized for light traffic will heat under sustained heavy traffic.
- Only then judge whether the drive is failing; heat, noise and smell together, with repeat faults, point to replacement, as the replacement article sets out.
Related checks are covered in the elevator drive fault alarms guide and the open-loop vs closed-loop elevator drive guide.
| Cause | Check |
|---|---|
| Blocked ventilation or heatsink | Airflow, filters, fan running |
| Sustained overload | Motor current against drive rating |
| Poor tuning or hunting | Levelling stability and ride smoothness |
| Wrong duty for traffic | Trip pattern against peak traffic hours |
| Routine | Frequency note |
|---|---|
| Clean heatsink and check fans | Seasonal, before summer |
| Check trip history, not just the last trip | After every heat trip |
| Re-check load after building changes | When traffic or use changes |
Frequently asked questions
Is a hot machine room alone enough to explain trips?
Often it contributes, but load, ventilation and tuning must be checked too.
Should I reset a heat trip and keep running?
No: record the pattern first; repeated resets hide overload or tuning faults.
Does a bigger drive always run cooler?
Not by itself: ventilation and tuning still decide heat, and an oversized drive on a poorly tuned machine still hunts.
If the fan runs constantly, is the drive definitely failing?
No: constant fan running is a warning to check ventilation and load first; it is one sign among several, not a diagnosis on its own.
When is replacement the right answer for heat?
When heat, noise or smell combine with repeat faults after ventilation, load and tuning have been checked.
Send the drive model, motor nameplate and trip pattern for a check: contact the IDEEI team.