If one of the corresponding DETECT boxes is marked, the state of that message is additionally included in the COLLEC-
TED ERROR STATE. When activating the HOLD option, the indicator stays red after the occurrence of an error. If the
HOLD option is not active, indication returns to green, once the fault is no longer detected. Pressing the CLEAR button
in the COLLECTED ERROR STATE line resets the indicator from red to green and stored errors are deleted. The
COLLECTED ERROR STATE indicator resembles exactly the Amplifier State indicator of the System Check Window. The
collected fault state message can be outputted via a control output. For detailed explanation please refer to chapter
Config & Info.
Error type
Description
FAULT DISPLAY
The red FAULT DISPLAY indicator lights, if a error message is indicated at the amplifier's front
LC-Display.
THERMAL WARNING
The power amplifier is protected against thermal overload and will reduce the output power if
the internal temperature exceeds a fixed threshold value (please refer to the owner‘s manual
for more details). In this case the THERMAL WARNING indicator lights red.
With the THERMAL HEADROOM parameter in IRIS-Net the threshold for the THERMAL
WARNING indication can be changed to get the warning indication already at lower
temperatures, meaning before the amplifier reduces the output power. The THERMAL
HEADROOM can be adjusted from 0 to 30 °C which means a temperature warning indication
could be configured up to 30 °C before reduction.
PROTECTION /
REDUCTION
When the red PROTECTION / REDUCTION indicator lights, one of the internal protections
(thermal overload, short-circuit, Back-EMF, HF at the output, etc.) has been activated. The
differentiated protections concept of the power amp results in several protection circuits
being activated one after another, which ensures that under normal circumstances the power
amplifier will stay in the safe and stabile operating range.
PROTECTION MUTE
When the red PROTECTION MUTE indicator lights, the signal path is switched off. The
amplifier needs to be switched off to prevent power amplifier and connected speaker systems
from being damaged, this is indicated by the PROTECT and MUTE-LEDs being lit
simultaneously.
SHORTED / LOAD LO This indicator lights red when the measured impedance value of the corresponding power
amp output falls below a pre-set minimum or when it is shorted. Setting the minimum value is
possible in the Load dialog.
OPEN / LOAD HI
This indicator lights red when the measured impedance value of the corresponding power
amp output exceeds a pre-set maximum or when cable interruption is detected. Setting the
maximum value is possible in the Load dialog.
INPUT PILOT
DETECTION
A remote amplifier's audio inputs support pilot-tone detection and evaluation. Using an
externally generated pilot-tone signal allows the monitoring of audio cables and analog input
stages. The threshold for 19 kHz pilot-tone evaluation is set to -40 dBu / 7.75 mV. The
indicator lights green when an external pilot-tone signal coming from mixer, matrix, controller,
etc. is detected. A missing pilot-tone signal or a drop in its level below the evaluation
threshold causes the indicator to change to red. Only mark the DETECT box next to the
indicator when an external pilot-tone signal actually exists and input monitoring has been
configured.
IRIS-Net
REMOTE AMPLIFIER | en 285
Bosch Security Systems B.V.
User Manual
2017.05 | 3.20 | F.01U.119.956
