Arcam P777 - Manual (Page 12)

E-10
Fault status indicators
The LED patterns below indicate the following fault conditions:
LED status Description Amplifier action
All LEDs are green This is the normal operating state of the amplifier. None
During power up all LEDs stay red for an extended time The amplifier is waiting for the DC offset fault lines to
clear. A DC offset fault can occur if an excessive DC
voltage is present at the output of the pre-amp feeding
the P777. Normal operation resumes if the lines clear in
20 seconds.
To verify excessive DC offset voltage, remove the
interconnect leads (with the P777 switched off) and turn
on the P777. The fault should have cleared.
During power up or normal operation, one or more
LEDs are flashing green, with the remaining LEDs solid
red
The DC fault cannot be cleared. The channels with the
flashing green LEDs represent the amplifier modules that
have a DC offset fault. Alternatively, a DC offset fault has
reoccurred on the same channel within 12 seconds of a
previous DC offset fault clearance.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger does
NOT reset the amplifier).
During power up or normal operation, one or more
LEDs are flashing green, with the remaining LEDs NOT
solid red
The amplifier is attempting to clear a DC offset fault on a
channel with the flashing green LED.
The amplifier mutes the channel with the fault and its
paired channel. The amplifier stays in this state for up
to two seconds or until the fault clears (whichever is
sooner).
During power up or normal operation, one or more
LEDs are flashing red, with the remaining LEDs solid
red
A short circuit fault cannot be cleared. The flashing red
LEDs represent the amplifier modules with a short circuit
fault. Alternatively, a short circuit fault has reoccurred on
the same channel within 12 seconds of a previous short
circuit fault clearance.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger resets the
amplifier).
During power up or normal operation, one or more
LEDs are flashing red, with the remaining LEDs NOT
solid red
The amplifier is attempting to clear a short circuit fault on
a channel with the flashing red LED.
The amplifier mutes the channel with the fault and its
paired channel. The amplifier stays in this state for up
to half-a-second or until the fault clears (whichever is
sooner).
During power up or normal operation, one or more
LEDs are flashing amber
The amplifier is attempting to clear an over temperature
fault on a channel with the flashing amber LED.
The amplifier mutes the channel with the fault and its
paired channel and the fan is set to maximum speed. The
amplifier stays in this state until the channel has cooled.
During power up or normal operation, one LED is
flashing amber, with the remaining LEDs solid red
An over temperature fault has reoccurred on the same
channel within 12 seconds of a previous over temperature
fault clearance. The flashing amber LEDs represent the
amplifier modules with an over temperature fault.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger resets the
amplifier).
During power up or normal operation, all the LEDs are
flashing amber
The amplifier is attempting to clear an over temperature
fault on more than one channel, or the power
transformers have overheated.
The amplifier mutes all channels and the fan is set to
maximum speed. The amplifier stays in this state until all
channels have cooled, or the transformer has cooled.
During normal operation, all the LEDs are solid red An over temperature fault has reoccurred on one or more
channels, or the power transformers have overheated
within 12 seconds of a previous over temperature fault
clearance.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger resets the
amplifier).
During power up or normal operation, one or more
LEDs are flashing amber, with the remaining LEDs
flashing green
A DC offset fault occurred on one or more channels
while attempting to clear a multiple over temperature
fault.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger does
NOT reset the amplifier).
During power up or normal operation, one or more
LEDs are flashing amber, with the remaining LEDs
flashing red
A short circuit fault occurred on one or more channels
while attempting to clear a multiple over temperature
fault.
The amplifier shuts down. The power switch must be
cycled to reset the amplifier (cycling the trigger resets the
amplifier).