Arcam P1000 manual Fault status indicators, DC offset faults, Light pattern, Description, E-10

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	None.
	of the amplifier.
The power light is amber	A “DC offset” fault has occured. A	The condition does not clear
and the channel lights	DC offset fault can occur if an	automatically.
are off.	excessive DC voltage is present	Simply to clear the fault, turn the
	at the output of the pre-amp.
		P1000 off for at least 30 seconds
	feeding the P1000. Please see the
		(using the switch on the rear of the
	note below.	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	A short-circuit fault has occured.	The amplifier mutes the channel
are flashing amber/green.	The flashing light(s) represent	with the short-circuit. If the fault is
	the amplifier channels with the	cleared, the amplifier will resume
	short-circuit.	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	An over-temperature fault has	The amplifer mutes the channel with
are amber.	occured on a channel with the	the fault. The amplifier stays in this
	amber light.	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.

P1000

E-10