Troubleshooting - Arcam HDA PA720 Handbook

Troubleshooting

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Problem Check the following
No sound The PA720 / PA240 / PA410 power amplifier is correctly plugged in and
switched on.
Your audio/video source (e.g. pre amplifier) is correctly connected.
The PA720 / PA240 / PA410 is not in protection mode, as described in
the next section.
The PA720, PA240 and PA410 is not muted.
Sound cuts-out unexpectedly The PA720 / PA240 / PA410 may enter a protection mode, depending on
the fault being detected. The front panel LED will indicate the fault type,
according to the list below.
FLASHING WHITE: The internal temperature of the unit reached an
unsafe level. Allow the PA720 / PA240 / PA410 to cool off.
FLASHING RED: The PA720 / PA240 / PA410 amplifier detected a
speaker short circuit. Should this happen, please inspect all the
speaker cables to make sure none of them are shorted together. This
fault is very common when bare wires are being used to make speaker
connections.
FLASHING ORANGE: PA720 and PA240 only. The amplifier detected a
DC offset.
Following any of the faults described above, the amplifier will turn itself
off and power to the speakers will be removed. To continue using the
PA720 / PA240 / PA410, the fault must be removed and the unit must be
turned OFF then back ON.
EN-18
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