Installation Manual

Versus Technology, Inc.
DT10000-A0001 33 Revision 8 December 1998
13. TROUBLE SHOOTING GUIDE
These are possible hardware trouble scenarios and solution issues that may affect the operation of the tracking
system. The Collector Voltage Troubleshooting Flow Chart and the Functionality Test Flow Chart are included
as troubleshooting strategies for correcting system hardware problems.
Problem: System will not start up.
Discussion: Most system failures on startup are caused by failure to properly crimp RJ Type connectors, along
with failure to test the completed connection.
Problem: Collector cannot be seen by the Concentrator on the Subnet.
Discussion: A collector works properly when unconnected to the subnet, on powering on, it blinks four to five
times every five or so seconds. Once connected to the concentrator’s subnet, upon power on, the collector light
should come on strong after the first few seconds and then blink only upon receipt of a badge ID.
Problem: Incorrect voltages across sensor pair at the punch down block.
Discussion: The voltage across the sensor pair at the collector punch-down block should be between 15 and 17
volts DC. A voltage above18 may indicate an open circuit, while a voltage below 15 may indicate RF
interference, or faulty sensor, or faulty wiring. RF interference may be verified by switching the meter to the
AC scale and reading voltage. With no tag id’s being sent down the sensor pair, any AC voltage reading may
indicate RF interference.
Problem: RF interference.
Discussion: RF may be checked as discussed above. Possible RF interference that effect the sensor network
include, certain types of energy efficient lighting and associated electronic ballasts. The most common
offenders are classified as T8 lights and have and electronic ballast in the 40 kHz range. Sensor wiring should
not touch electrical conduit, or ceiling grates, as they are very good at picking up RF frequencies.
Problem: Sensor not picking up id from tag (non-working sensor).
Discussion: Smoke detectors using IR detection interfere with Versus sensors. The sensor should not be
installed within two feet of smoke detectors to avoid any interference.
Problem: Collector mounting failures.
Discussion: Collector mounting failures can be avoided by using the mounting clip provided to hold the end of
the collector firmly against the wall.