3M 8900B Series Owner's Manual - Troubleshooting
Troubleshooting
Problem
Possible Cause
Action
Unit not plugged into power.
Plug the unit in and wait 10 seconds for
full operation.
No alarm or patron count
Circuit breaker off.
Reset circuit breaker and wait 10 seconds
for full operation.
No alarm
Unsecured tag
Test the system with another library item
that you know has a secured tag.
Materials from another library
Identify material that caused the alarm.
Unwanted alarms (infrequent)
Failure to unsecure tags properly
Follow correct checkout procedures
outlined in 3M literature. Check operator
training procedures.
Failure to unsecure tags properly
Follow correct checkout procedures
outlined in 3M literature. Check operator
training procedures.
Unwanted alarms (frequent)
System failure
Place service call to 3M.
Metallic objects too close to the system
Remove nearby metal.
Books not properly secured
Retest with a properly secured book.
Reduced coverage
System failure
Place a service call to 3M.
Incomplete walk through test
Retest by walking through the corridor.
The light beam between the photocell
and the reflector must be interrupted to
increment the patron counter.
Patron counting is configured for
counting in the other direction
Retest by walking through the corridor in
the opposite direction.
Patron counter did not increment
System failure
Place a service call to 3M.
Patron count too high or too low
Patron counting is configured differently
than expected.
Verify patron counting is configured
correctly.
Only some lattices work
Power to only part of the detection system
Systems with more than four corridors
are powered from both ends of detection
system. Make sure both sidess are
connected to power.
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