You have specialist equipment, i recommend it is sent to a specials for calibration.
i could be that the warning is somehow connetied and calibration will ensure that what you dial is exactly was is being supplied.

also this model most likely has cooling and that may be getting blocked check that any air intakes and filters are clean and clear to ensure good airflow if the device is getting hot it may cause the warning light to go on.

also ensure the lines are not shorting anywhere.

I hope this was helpful.