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Warning and error messages shown on the LCD display
• SUB AMP SHUT DOWN: the subwoofer amplifier has shut down due to an error: over-
temperature, supply voltage error or short circuit on the output.
• SUB AMP DC ERROR: the subwoofer amplifier has encountered a DC offset error and has shut
down.
• LEFT AMP SHUT DOWN: the left channel amplifier has shut down due to an error: supply
voltage error or short circuit on the output.
• RIGHT AMP SHUT DOWN: the right channel amplifier has shut down due to an error: supply
voltage error or short circuit on the output.
• LEFT AMP DC ERROR: the left channel amplifier has encountered a DC offset error and has
shut down.
• RIGHT AMP DC ERROR: the right channel amplifier has encountered a DC offset error and has
shut down.
• INVALID EXT. VOL: the external volume control option has been enabled while no external
volume control is present at the rear connector, or the external volume potentiometer value is
out of range.
• INPUT OVERLOAD: the analog input is overloaded, this can be caused by an incompatible
system configuration or a severe ground loop.
• SUB AMP OVERLOAD: the subwoofer amplifier is being overloaded, due to extremely low load
impedance or a short circuit.
• LEFT AMP OVERLOAD: the left channel amplifier is being overloaded, due to extremely low
load impedance or a short circuit.
• RIGHT AMP OVERLOAD: the right channel amplifier is being overloaded, due to extremely low
load impedance or a short circuit.
When one of the above mentioned errors has occurred, we strongly advise to switch of the unit.
Then disconnect all inputs and outputs and power on again. In case external volume control
is enabled, disable the external volume control in the settings menu and check if the error still
occurs. In case overheating is the cause of the error, wait for a few hours and allow the amplifier
to cool down. In case the mains supply is permanently out of range, the amplifier will not pass its
initial power-on self-tests and will not switch on. First trace the cause of the error, remove the error
situation and power on again.
When there is a temporary problem with the mains supply voltage, caused by a spike or voltage
dip, the unit will power down and restart. In this case, during power on self test, there will be an
additional message “Watchdog Reset” in the RS232 startup text dump.