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4.2 OptiMains® Protection for Excessive Under/Over-Voltages
The PH-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
OptiMains®
).
In the case of extreme power surges, brown outs or other exceptional/unexpected conditions that exceed the safety
margins, the
OptiMains®
system will automatically switch off the mains power to the internal parts of the PH-77 to
prevent any damage from occuring.
If the display reads:
A C
V o l t a g e
O u t s i d e
O p e r a t i n g
R a n g e !
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
fluctuations...
.
.
.OptiMains® will detect
and protect
