Bosch DS484Q User Manual

DS484Q/DS486Q | Installation Instructions | 7.0 Troubleshooting
18 Bosch Security Systems, Inc. | 7/05 | 4998138530F
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 Cause Solution
Something is blocking the beams. Remove the object(s).
Optical modules or covers need
cleaning.
Clean the optical modules and the covers.
Improper channel selection Select the proper channel.
Refer to Section 4.1.3 Beam Group and
Channel Setup on page 11.
Constant alarm output
Synchronized wires are not connected. Connect the synchro wiring correctly. Refer to
Section 4.1.4 Synchronized Wiring on page 12.
Something is blocking the beams. Remove the object(s).
Beam interruption time is set too short. Decrease the sensitivity. Refer to Section 4.1.1
Receiver Setup on page 10.
Electrical noise or radio frequency
interferency (RFI) nearby
Change the installation site.
Wiring too close to power sources or
power line
Change the routing of the wiring.
Unstable installation site Fix the installation site.
Out of maximum protection range Reinstall the units within the maximum protection
range. Refer to Section 2.1 Installation
Considerations on page 5.
Inappropriate Beam Power Control level Readjust the control level. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
Frequent false alarms
Frost or dew is present. Attach the optical heater.
Beams are reflected into the receiver. Remove the reflective object or change the
installation site.
Beam interruption time is set too slow. Increase the sensitivity. Refer to Section 4.1.1
Receiver Setup on page 10.
No alarm when beams are
blocked
Not enough beam power Increase the beam power. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
Something is blocking the beams. Remove the object(s).
Installed on unstable ground Fix the installation site.
Out of maximum protection range Reinstall the units within the maximum protection
range. Refer to Section 2.1 Installation
Considerations on page 5.
Inappropriate Beam Power Control level Readjust the control level. Refer to Table 5 and
Table 6 in Section 4.2 Alignment on page 13.
EDC LED turns ON
frequently
Frost or dew is present. Attach the optical heater.
POWER LED on transmitter
flickers
Synchro wires are not connected. Connect the synchro wiring correctly. Refer to
Section 4.1.4 Synchronized Wiring on page 12.

Bosch DS484Q Specifications

General

Brand	Bosch
Model	DS484Q
Category	Security System
Language	English