The LED indicator light keeps you aware of the statue of the unit.
See document for color meaning.
Look at this document to know the steps to follow if you have no more power on your unit.
Refer to this document for the step to follow to reset your PC board
If your unit surges, you must follow these steps to find the problem.
Refer to this document to know the steps to fix the problem.
This must be because the piping installation was reversed.
Please refer to this document to know how the piping must be installed.
If your unit doesn’t start or stop, please look at this document to see the possible problem.
This happens when the vacuum is not well hung.
Please, look at this document to see how it should be hung properly.
See the document below that explains when your LED light will change, what it means, and what action should be taking.