Appendix; Faults And Warnings Overview - Lab.gruppen PLM Series Operation Manual

Appendix

9. Appendix
9.1

Faults and Warnings Overview

Fault or warning conditions are indicated by the LED shown in Figure 7-3 on page 34, and also by LEDs
associated with the inputs and outputs on the PLM. As the LEDs indicate several types of faults or warn-
ings, a brief textual description of the fault or warning is provided on the LCD display. Section 7.8.2 on page
34 details the fault and warning indications that appear on the front panel. Table 9-1 lists the events that
may have triggered each fault or warning condition.
Model Displayed Text
ALL AMP CH. MUTE
ALL ANALOG IN
FAULT
20000Q ATL ACTIVE
ALL AUDIO FAULT
20000Q BEL ACTIVE
ALL CAL ACTIVE
20000Q CHECK AC
MAINS
ALL CLOCK SLIPPING
ALL CTRL OFFLINE
ALL CURRENT CLIP
ALL INPUT CLIP
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PLM Series Operation Manual Rev 1.3.5
Event Log Text
Amp Channel Mute
Frame Fault: Analog Input
N/A
Frame Fault: Audio Interface
N/A
n/a
Frame fault: Check AC Mains
AES Clock slipping
N/A
n/a
n/a
Category Description
Mute The audio signal has been muted in the
power output stage.
Fault The analog input signal is corrupt due
to DC on the analog input, or there is an
issue with the internal A/D converter.
Warning The output power is limited due to high
amplifier channel temperature - the amp
channel temperature limiter is active.
Fault An internal audio fault has arisen and the
unit needs servicing.
Warning Breaker Emulation Limiter present as the
nominal current reached. Improve the
power distribution and adjust the BEL
settings.
Fault Ensures that the PLM's power output
stages are not overloaded. This should
never happen during normal program
material.
Fault The PSU received unstable mains, check
the mains configuration.
Warning The AES or Dante clock is slipping; verify
clock selection / generator. This will
cause high THD on signal, and if Dante
is running will result in an unstable signal
distribution.
Warning The PLM is no longer able to communi-
cate with the Lake Controller.
Clip PLM's power output stage current has
exceeded the fixed safe maximum and
the Current Peak Limiter has become
active to limit it.
Clip The input signal level is too high and is
causing clipping at the input stage