Bleeping imist - help!

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I have an imist system. The unit is bleeping a rather loud intermittent bleep every 20 minutes. I suspect it is some sort of alarm to warn the user that it needs its annual service (which is booked in two weeks) but I don’t know.

 

Does anybody have an imist? I tried locating the manual online, but the imist website is down.

 

We could flick the switch at the main consumer board, but I have a feeling that may shut the water off (there is a priority demand valve that diverts water to only the imist in the event of a power cut - stupid, I know).