No Sound Coming From The Router; Volume Override Only Working For Emg, Not For Business Calls (Or Similar Problems); False Ground Short Fault; Start/Stop Function On Trigger Inputs - Bosch Plena Voice Alarm System Installation And Operation Manual

88 en | Troubleshooting
8.7

No sound coming from the router

Please check, if you are using a Plena Power Amplifier 720/480W, if the Line signal is
connected to the Program Input. If the line signal is connected to the Priority Input instead of
the Program Input there will be no output signal on the amplifier's loudspeaker output.
8.8 Volume override only working for EMG, not for business calls
(or similar problems)
Confusion can arise in 2-channel operation. In contradiction to what one would expect volume
override will be active in zones without BGM when no call is active. This is sometimes wrongly
interpreted mixing up fail-safe override and power saving override.
8.9

False Ground Short fault

Please check if the 0V and 100V connections are swapped. Swapping these could cause a
false ground short fault appearing and disappearing at unpredictable moments and events.
8.10

Start/Stop function on Trigger Inputs

This is a functionality which is not really intended at the moment, but may be desired by the
user. Program a message which consists of a silent wave file, with the maximum repeat of
255. Name it Stop.
Figure 8.1 Silent wave file message
Since the Start action on the trigger input needs to be latched the Trigger Type under Action
Programming>Controller>EMG Trigger / Fault Detector should be set to Toggle. Configure the
alarm message for the Trigger Input which you want to be used for the Start function.
Configure the silent message named Stop for the Trigger Input you want to use for the Stop
function. Select All Zones for its Zone Selection. The priority must be higher than the priority
of the Trigger Inputs used for Start.
9922 141 1037x (V2.16) | V0.6 | 2011.09 Installation and Operation manual
Plena Voice Alarm System
Bosch Security Systems B.V.