Troubleshooting - Bosch DS484Q Installation Instructions Manual

DS484Q/DS486Q | Installation Instructions | 7.0
7.0

Troubleshooting

If the system does not operate as expected, check for the following conditions.
The input voltage is between 10.5 VDC and 28 VDC at the terminal on the transmitter and on the receiver.
The loop resistance of the alarm output is less than 100 Ω.
The monitor LED on the transmitter is ON.
The ALARM LED on the receiver is ON when both upper and lower beams are simultaneously adjusted for the
beam interruption time.
The output of the beam alignment check terminal on the receiver is 3.0 VDC to 3.75 VDC.
Table 10: Common Troubleshooting Problems and Solutions
Problem
Constant alarm output
Frequent false alarms
No alarm when beams are
blocked
EDC LED turns ON
frequently
POWER LED on transmitter
flickers
18
Cause
Something is blocking the beams.
Optical modules or covers need
cleaning.
Improper channel selection
Synchronized wires are not connected.
Something is blocking the beams.
Beam interruption time is set too short.
Electrical noise or radio frequency
interferency (RFI) nearby
Wiring too close to power sources or
power line
Unstable installation site
Out of maximum protection range
Inappropriate Beam Power Control level
Frost or dew is present.
Beams are reflected into the receiver.
Beam interruption time is set too slow.
Not enough beam power
Something is blocking the beams.
Installed on unstable ground
Out of maximum protection range
Inappropriate Beam Power Control level
Frost or dew is present.
Synchro wires are not connected.
Troubleshooting
Solution
Remove the object(s).
Clean the optical modules and the covers.
Select the proper channel.
Refer to Section 4.1.3 Beam Group and
Channel Setup on page 11.
Connect the synchro wiring correctly. Refer to
Section 4.1.4 Synchronized Wiring on page 12.
Remove the object(s).
Decrease the sensitivity. Refer to Section 4.1.1
Receiver Setup on page 10.
Change the installation site.
Change the routing of the wiring.
Fix the installation site.
Reinstall the units within the maximum protection
range. Refer to Section 2.1 Installation
Considerations on page 5.
Readjust the control level. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
Attach the optical heater.
Remove the reflective object or change the
installation site.
Increase the sensitivity. Refer to Section 4.1.1
Receiver Setup on page 10.
Increase the beam power. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
Remove the object(s).
Fix the installation site.
Reinstall the units within the maximum protection
range. Refer to Section 2.1 Installation
Considerations on page 5.
Readjust the control level. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
Attach the optical heater.
Connect the synchro wiring correctly. Refer to
Section 4.1.4 Synchronized Wiring on page 12.
Bosch Security Systems, Inc. | 7/05 | 4998138530F