Crown Audio Commercial Audio Series (180A-280A-660A-1160A) - Manual (Page 14)

Commercial Audio Series Amplifiers
page 14 Operation Manual
CONDITION: No power to the
amplifier.
POSSIBLE REASON:
• The amplifier’s Power switch is off.
• The amplifier is not plugged into the power
receptacle.
• The amplifier’s high-voltage power supply cir-
cuit breaker has tripped, or the fuse has opened
on 220/230/240V models. Verify that the AC
mains voltage is correct, then press the Reset
button on the back panel.
• If the unit is operated from a 24V DC supply,
the internal fuse may have opened. (The power
switch has no effect on 24V operation.)
CONDITION: Distorted sound.
POSSIBLE REASON:
• Input signal level is too high. Turn down your
input volume controls. NOTE: Your amplifier
should never be operated at a level which
causes the Clip LEDS to illuminate constantly.
• Master volume level is too high. Turn it down
to about 3/4 of maximum level.
CONDITION: No sound.
POSSIBLE REASON:
• The amplifier is in “fault” mode. A Fault status
can be triggered when one of the amplifier’s
protection circuits is activated. First disconnect
your speakers from the affected channel(s) one
by one to determine if one of the loads is
shorted. If an amplifier channel has a thermal
fault, there will be no indication on the front
panel, but the amp will recover after cooling. If
operation does not return to normal after
restarting your amp, check the fuse and replace
if necessary, or return the amp to Crown or an
authorized Crown Service Center for servicing.
3 Troubleshooting