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6 Status Messages
6.1 OVERLOAD
The status display consisting of three LEDs is used to display the operating
states of the amplifier.
Via different color- and flash-combinations the individual operating states can
be displayed.
Normal operation;
no overload, output not clipped
Overload condition;
the relevant phase is open circuited or is
connected to a too high burden. If the output is
open, even without any input signal, an overload
indication might result due to the offset current.
Red/dark
flashing
(0.5s/0.5s)
Temperature overload;
the device has turned OFF due to overheating -
and will turn itself back ON after the temperature
has dropped below a threshold.
Red/dark
flashing
(1s/1s)
Overcurrent at one of the outputs, caused by a
too high input signal;
approx. from 55 A
rms
output
switching ON is attempted every 8 sec.
Red/green
flashing
(0.5s/0.5s)
Hardware fault in the device;
switching ON is attempted every 8 sec.
Table 6 LED messages displayed on the front panel of the CMA 56
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