What Causes Servos to Overheat?

There’s a really simple answer to this question: heat causes servos to overheat. OK, but where does that heat come from? All servo motors — even servos that work properly — generate heat. Typically your servos can dissipate enough heat to prevent overheating. They only overheat when something causes malfunction.

There are several possible causes for servo drive or servo motor overtemperature — the solution is the same. For immediate servo repair or troubleshooting call 479-422-0390 or contact us online .

Indramat error codes for overheating servos

Common Indramat heat errors include:

  • E250 Drive Overtemperature Warning
  • E251 Motor Overtemperature Warning
  • E252 Bleeder Overtemperature Warning
  • F218 Heatsink Overtemperature Shutdown
  • F219 Motor Overtemperature Shutdown
  • F220 Bleeder Overtemperature Shutdown

Things that cause servos to overheat


The heatsink, fan, or other parts of your Indramat machinery are too dirty. Dirt and grime buildup can cause servos to work harder and get hotter. This can also prevent proper heat displacement. Take a look at your servos to see if they need cleaning.

Broken fan

Your cooling system gets rid of excess heat from your servos. A broken fan or blower can’t cool your servos properly. Repair servo blowers as soon as possible.

Broken cabinet

Air conditioned cabinets lower the ambient temperature which helps keep servos cool. Cabinets also protect your servos from pollution, temperature fluctuation, and exposure to moisture and humidity; they control the environment for your servos. Broken cabinets lead to broken servos. Fix or replace cabinets to reduce wear and tear on your servos.

Clogs or improper ventilation

Obstructions in your ventilation can also cause servos to overheat. Your servos must be well ventilated to effectively remove heat. Make sure that all machinery is installed properly, and clean out vents.

Problems with the cable

Issues with the motor temperature monitor cable can prevent proper cooling. Check connections to make sure that cables are secure, and replace any defective motor temperature monitor cables.

Bad parameters

Incorrect parameters cause issues with the speed control loop. Compare the parameters with those in your Indramat manual, and resolve any problems.

Motor overload

Servos can overheat if the load is too heavy, or if you are using an incorrect motor rating. Overloading the servo can cause overheating and other problems with your system.

Too much brake resistance

Excessive brake resistance or friction can also cause servos to overheat.

Call 479-422-0390 for immediate support

Don’t delay support for Indramat servo overtemperature error codes. We’ve seen people wait until there’s a failure. Don’t do this. We’ve also seen factories blast their servos with box fans to keep them cool. Do not do this, either.

You need to resolve the problem as quickly as possible. We can help with this. We offer Indramat factory repair with 24-hour turnaround. Call 479-422-0390 today.