Troubleshooting; Introduction; Message Or Chime Does Not Sound; No Pilot Tone Detected On Eol Board - Bosch Plena Voice Alarm System Installation And Operation Manual

Plena Voice Alarm System
8

Troubleshooting

8.1

Introduction

Although the Plena Voice Alarm System is simple and easy in general, still questions may arise.
Maybe because of inexperience or maybe because of exploring limits of what the Plena Voice
Alarm can do. In practice often the same questions reoccur. In other cases questions can be
foreseen. An attempt was made to put al these questions on paper, so there is no need to ask
them anymore. The answers are here already and the questions are listed by symptom.
If necessary, refer to Table 7.2 for information on the system fault indicators.
8.2

Message or chime does not sound

First check if all messages (and wave files) were downloaded using the option Upload
messages and configuration. You should do this when ANY message or wave file is changed. If
this is omitted even messages that are unchanged may stop working.
Some wave files are known to contain a proprietary block of data which cannot be interpreted
by the Plena Voice Alarm Controller. This block of data is called a PAD chunk. This PAD chunk
can easily be removed by first loading the wave file into Audacity and then saving it again
without modifying. Audacity will save it without the PAD chunk. Audacity is a free software
tool that is included on the Plena Voice Alarm CD.
8.3

No pilot tone detected on EOL board

The EOL board only works on a 2-channel system. Pilot tone detection will also fail in a
Controller zone when BGM is selected and BGM is attenuated more than -9 dB with the rotary
volume control. Also when a call is going on the pilot tone will be absent on zones without call
and BGM. Fault detection on the Plena Voice Alarm System will ignore this if properly
configured.
8.4

No pilot tone detected on power amplifier

This may happen when the 100V slave input is used and the 0V and 100V connections are
swapped.
Another possibility is when the 100V slave input is used and no Call or BGM is present on the
100V input (from the 100V A or B line). When you want to use pilot tone supervision be sure to
use 2-channel mode and define the fault trigger input as EOL supervision input.
8.5

No BGM on the router

Please be aware that the 70V terminal of the Booster 1 input should be connected to the 70V
output of the Power Amplifier. If this omitted there will not be BGM on the zones of the
router.
8.6

No BGM on controller or router

This can happen when there is an amplifier failure, for instance in a 1-channel system without
using a spare amplifier. If supervision of the spare amplifier is nevertheless enabled a fault is
detected and BGM will be disabled. Check for the amplifier fault and rectify the problem, for
instance by correcting the configuration or replacing the defective unit.
Bosch Security Systems B.V. Installation and Operation manual
Troubleshooting | en
9922 141 1037x (V2.16) | V0.6 | 2011.09
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