The discharge head has dropped below the rated point and the pump is pumping too much liquid throttle the discharge to bring duty point back onto the curve trim the impeller reduce vsd speed.
Well pump motor overheating.
There are a number of procedures for checking out whether you have a defective pump and or motor.
That water use could be dropping the water level in the well or simply running the pump a long time either causing a marginal near end of life motor to overheat and seize up drawing high current tripping a breaker.
Operating conditions can cause a motor to overheat such as a well pump that runs continually because of other problems in the water system.
The liquid is heavier than expected check specific gravity viscosity.
The motor requires excessive power.
To avoid this problem be sure to limit back to back plumbing fittings which compound losses and be sure that the pump is matched well with the other equipment and the demands of the pool.
This concludes part 1 a discussion of the causes of overheating in pumps.
Malfunctioning well pump pressure switch like any mechanical part your pressure switch can wear out and malfunction over time.
Save money and hassle.
I have an irrigation pump that runs well with no load.
Under load it overheats within 2 3 minutes and restarts after a couple of minutes for about a minute.
Http bit ly 2cpxssv have a quest.
Check the pump and motor.
I have cleaned the impeller and motor removing dust etc.
On 2018 11 06 by vicki green.
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So your well water flow rate may be poor or your pump is at end of life or both.
An air conditioner compressor motor that is overheating may sometimes be re started by cooling the equipment with water watch out for shorting electrical components.
Thanks for your help.
If the troubleshooting in the 4 steps above do not resolve your problem it may be time to replace the pump and motor.
Even a brand new pump can get too hot and suddenly stop working and have to be replaced.
A malfunctioning switch can cause the pump to run too often or too long and potentially burn out the motor.
An overheating water pump can shorten the life of the motor and cause damage to surrounding piping.