Extron electronics NetPA Ultra Series User Manual page 68

Status Possible Triggers
Overload The current or
•
power limiter has
been triggered.
• A short on the
affected output
channel has been
detected.
Open Circuit
The affected channel
has detected an open
circuit.
Digital clip
Audio output sounds
distorted.
Unit is in standby
The unit has been
placed into standby.
7
Possible Causes
Too much current is
•
being drawn due to
overdriving the output.
• An improper speaker
load has been
attached (for example,
attaching a low
impedance speaker
to a high impedance
output).
• The output has been
shorted.
• The connection to the
speaker chain has
been broken.
• An improper speaker
load has been
attached (for example,
attaching a high
impedance speaker
to a low impedance
output).
No speaker load is
•
attached.
The output DAC is being
overdriven.
• The auto-standby
timer has timed out.
• The contact closure
port is engaged on the
rear panel.
• SIS has forced the unit
into standby.
• DC has been detected
on an output.
Legend — see figure 64 on page 57
(
• Red — The amplifier is actively detecting a fault.
Yellow — The amplifier is not actively detecting a fault, but one has been detected
•
since the last time the status flags were reset.
• Gray — The amplifier has never detected a fault.
NetPA U 2002 SB User Guide • DSP Configurator Software
Possible Solutions
• Recheck the amplifier gain
structure.
• For low-impedance loads: Verify
that total impedance at the amplifier
is ≥ 4 ohms.
• For 70V/100V speaker loads:
Recheck speaker taps.
• Check for shorts at the output and
throughout the speaker chain.
Check for an open circuit at the
•
output and throughout the speaker
chain.
Recheck speaker taps.
•
Recheck the amplifier gain structure.
• Check that there is sufficient signal
going to the amplifier channel.
Check that the standby port is not
•
engaged.
• Check that the SIS is not forcing
the unit into standby.
• If none of the above work, check
for a DC fault (see suggestions for
DC protection).
)
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