Arcam P1000 - Manual (Page 10)

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Fault status indicators
The light patterns described below indicate the following fault conditions:
Light pattern Description Amplifier action
All lights are green. This is the normal operating state
of the amplifier. None.
The power light is amber
and the channel lights
are off. A “DC offset” fault has occured. A
DC offset fault can occur if an
excessive DC voltage is present
at the output of the pre-amp.
feeding the P1000. Please see the
note below. The condition does not clear
automatically.
Simply to clear the fault, turn the
P1000 off for at least 30 seconds
(using the switch on the rear of the
unit), then turn it on again.
If the fault fails to clear using this
method, or to verify excessive DC
offset voltage, turn the P1000 off
using the switch on the rear of the
unit, remove the interconnect leads
(with the P1000 switched off), then
turn the P1000 on again. The fault
should have cleared; if the power
light is still amber then your P1000
has developed a fault. Switch the
unit off and contact your dealer.
One or more channel lights
are flashing amber/green. A short-circuit fault has occured.
The flashing light(s) represent
the amplifier channels with the
short-circuit. The amplifier mutes the channel
with the short-circuit. If the fault is
cleared, the amplifier will resume
normal operation.
Note that audio must be fed to the
channel for the short-circuit to be
detected. For example, muting the
output using your pre-amp. will
make the fault appear to clear;
it is likely that the fault condition
will re-occur when the pre-amp. is
unmuted, however, unless further
action is taken.
One or more channel lights
are amber. An over-temperature fault has
occured on a channel with the
amber light. The amplifer mutes the channel with
the fault. The amplifier stays in this
state until the channel has cooled. If
this fault occurs frequently, ensure
that the amplifier has adequate
ventilation.
DC offset faults
A “DC offset fault” is not an amplifier fault, but a speaker protection mechanism. If the amplifier is
supplied with a DC voltage (rather than the expected AC voltage) for an extended length of time, the
coils in the attached speakers will eventually burn out (or, in extreme cases, catch fire). The P1000 can
detect this condition, and cut the current to the speakers.
DC offset faults can occur intermittently in all set-ups, particularly if a tuner or satellite receiver is
connected. If it occurs frequently or predictably, please contact your dealer for advice.