Furman PST-8 Manual Del Proprietário página 6

Circuit Breaker
If the PST-8 is connected to an AC outlet where sufficient voltage
is present, the unit should operate properly with the protection OK
indicator lit, after the main power switch is turned to the on position.
If the unit still does not function under these conditions check the
circuit breaker button! It is the round black button adjacent to the
incoming AC cord. If the circuit breaker trips immediately, there may
be too great of a current load placed upon it. Simply disconnect one
product at a time until this no longer happens. If the breaker trips
with no components connected, there may be a wiring defect that
requires Furman service.
Indicators
Extreme Voltage Shutdown Indicator:
Furman's SMP+ circuit senses sustained voltages that are high
enough to cause damage to your components, and shuts the
power down before damage can occur. Such conditions can include
accidental connection to a 240VAC source (where 120VAC is
expected), or an open neutral from a 208 or 240VAC source.
The Extreme Voltage Shutdown LED is normally off. If an input
voltage in excess of 137VAC is sensed, either on initial power-up
or during normal operation, the PST-8 will shut off power and this
indicator will light.
NOTE: If the mains power is above the high cutoff voltage and has
caused the unit to remove power from its outlets, it can not restore
power without the operator manually turning the unit off, then on