Varian 720- ES ICP: high pitched noise (error: F16502, F1254, F16510)

We have a Varian 720- ES ICP in the lab. This week, every time we tried to use it, it made an extremely loud and high pitched noise and a message appeared with the following errors:

F F16502: Internal Error. Variuan Reference - (WS) Asynchronous error.
F F1254: Internal Error. Varian Reference - Over current failure.
F F16510: Error. The plasma has gone out unexpectedly
Is there anything I can do?

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