9
Fault
condition
SGL led CH1
= red
TEMP led CH1
= red
SGL led CH2
= red
TEMP led CH2
= red
What to do ?
Output signal
condition
Ch 1 amp
overheat
Yes
Reduce input
signal or check
amplifier load.
Wait for cool
down.
No output
Ch 2 amp
overheat
Yes
Reduce input
signal or check
amplifier load.
Wait for cool
down.
No output
Ch 1 amp
error (DC,
HF, short
circuit,
overload)
Yes
Switch off power
and remove
error. Leave
switched off
for at least 10
seconds. Switch
power on.
No output
Ch 2 amp
error (DC,
HF, short
circuit,
overload)
Yes
Switch off power
and remove
error. Leave
switched off
for at least 10
seconds. Switch
power on.
No output
Transformer
thermal
protection
Yes
Yes
Yes
Yes
Switch off power
and wait for cool
down*.
No output
*In case the transformer is overheated, it may take a long time before the amplifier has cooled
down sufficiently. In such cases, you may have overloaded the amplifier too much. Power off the
amplifier immediately, correct the error and wait until the amplifier has cooled down.
Led status messages
Under normal circumstances, this amplifier will not overheat. If any of the above
mentioned overheating situations occur, please check the load impedance, the
ventilation and last but not least, input levels. The intelligent APC circuitry will
reduce input gain and level to a safe margin within certain limits. This circuitry can
not correct an input signal that is already clipped and distorted.
