User Manual

Nu
mbe
r
Message Severity Content Action Single/Co
ntinuing
21 Amplifier Ch.* DC Output Fault (at startup) The amp
cannot start up because
there is an abnormality in
the amp output.
It might be that the unit
has malfunctioned.
Contact a Yamaha service
center.
Single
The amp was stopped
because there is an
abnormality in the amp
output of the
corresponding channel.
Continuin
g
22 Amplifier Ch.* Overcurrent Error The output was muted
because excessive current
flowed to the amp of the
corresponding channel.
- Reduce the output
volume so that the current
value does not become
excessive.
- The speaker output jack
might be shorted.
Continuin
g
23 Amplifier Ch.* Overtemp
Level 1
Error Because the amp
temperature of the
corresponding channel
exceeded level 1, the fan
rotation speed was raised
and the limiter was applied
to the output.
- Reduce the output
volume so that the
temperature does not
become excessive.
- Clean the filter. Also,
keep the room
temperature constant.
Continuin
g
24 Amplifier Ch.* Overtemp
Level 2
Error Because the amp
temperature of the
corresponding channel
exceeded level 2, the fan
rotation speed was raised
and the limiter was applied
to the output.
Continuin
g
25 Amplifier Ch.* Overtemp
Level 3
Error Because the amp
temperature of the
corresponding channel
exceeded level 3, the fan
rotation speed was raised
to the maximum and the
output was muted.
Continuin
g
26 Ch.* High Load Warning The impedance value of
the corresponding channel
monitored by the Load
Monitoring function is
higher than the specified
value.
- Check that there is no
abnormality in the speaker
or cable.
Check that the Threshold
setting value is
appropriate.
Continuin
g
27 Ch.* Low Load Warning The impedance value of
the corresponding channel
monitored by the Load
Monitoring function is
lower than the specified
value.
Continuin
g
16. Power Amplifiers : PC-series
258 | ProVisionaire Design User Guide