User's Manual

Versus Technology, Inc.
40 Versus Information System
5. Troubleshooting Guide
These are possible hardware 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: If 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 above 18 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 badge IDs being sent
down the sensor pair, any AC voltage reading may indicate RF interference.
Problem: RF interference.
Discussion: RF interference may be checked as discussed above. Possible RF interference that
affects the sensor network includes certain types of energy efficient lighting and associated
electronic ballasts. The most common offenders are classified as T8 lights and have an 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 badge (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.