A user facility biomedical technician (biomed) reported that the motor protection switch (mps) from an aquabplus 2000 was tripping in stage 1.
The system had just finished heat disinfect and was in cool-down when it powered off.
The biomed did not think there were any alarms that occurred in conjunction with the tripping mps.
This occurred early in the morning, before any treatments had started.
Some treatments were delayed by approximately 30 minutes, but all patients were able to complete their treatments after the reverse osmosis (ro) machine was fixed.
To resolve the reported issue, the biomed replaced the mps.
Upon further inspection of the mps, charring was found on one of the metal prongs.
The biomed stated that it looked burnt (or charred); however, there was no evidence of any burning smell, arcing, smoke, sparks, or flames.
There were no blown fuses in the local power supply, and there were no power grid issues in the area around the date of the event.
The biomed reported that the mps was available to be returned for manufacturer evaluation.
A photo of the burnt metal prong was provided for review.
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