Installation Manual

Versus Technology, Inc.
DT10000-A0001 34 Revision 8 December 1998
Trouble shooting guide
Condition Possible Cause Remedy
System fails to start up.
Faulty wiring Re-crimp RJ type connectors.
Red light on collector flashes in
a constant pattern.
Two flashes Power trouble
Check to be sure unit connections
are secure and adequate power
has been applied.
Three flashes Disconnect the collector from the
punch down block. If the
flashing pattern continues the
problem is in the collector. If it
stops, one or more sensor inputs
is reporting a constant R
input????
Four flashes 485 Data wiring reversed Reverse pair from collector to
concentrator.
Five Flashes No data error No subnet data observed check
the 485 line to the concentrator.
Voltage across sensor pair is <
15 Volts DC
Faulty wiring
Faulty sensor
RF interference
Check for RF interference.
RF interference me verified by
switching the voltmeter to AC
scale and reading the voltage.
With no tag inputs the AC
reading should be
> .1 volt
Voltage across sensor pair is >
18 volts.
Open circuit. Check wires for opens.