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3c. OptiMains® Protection for Excessive Under/Over-Voltages
The AM-77 is fitted with the OptiMains® system to condition and adjust the incoming mains supply for best
operation under all normal mains conditions (including situations that will cause audible problems without Opti-
Mains®).
In almost every country throughout the world, instances do arise where fluctuations in the main electricity
exceeds that of a correctly operating mains supply and any electrical item/product is no longer properly served.
In the case of extreme power surges, brown outs or other exceptional/unexpected conditions that exceed the
safety margins, the OptiMains® system automatically will switch off the mains power to the internal parts of
equipment to prevent any damage from occuring.
If the display reads:
AC Voltage Outside
Operating Range!
Power OFF your AMR component and wait at least 5 minutes. If and when the mains electricity has been
deemed to have returned to normal (such as during a brown out and the lights have dimmed but have returned to
normal brightness) then power up your AMR component as per the manual’s instructions.
Sometimes there
are excessive
mains fluctua-
tions
...OptiMains®
will detect and
protect