3M 9900 Series owner manual Troubleshooting, See Patron counting on

Troubleshooting

Problem	Cause	Action
No alarm, no patron count	Unit not plugged in to power outlet	Make sure the unit is plugged in;
		wait 10 seconds for full operation.
	Circuit breaker off	Reset facility circuit breaker; wait
		10 seconds for full operation.
No alarm	Tag unsecured	Test system with another library
		item known to have a secured tag.
Infrequent unwanted alarms	Protected material from another	Identify material that caused the
	library	alarm.
	Failure to unsecure tags properly	Follow correct checkout
		procedures outlined in 3M
		literature.
		Check operator training
		procedures.
Frequent (daily) unwanted alarms	Failure to unsecure tags properly	Follow correct checkout
		procedures outlined in 3M
		literature.
		Check operator training
		procedures.
	System failure	Place service call to 3M.
Reduced coverage, no alarm	Metallic objects too close to the	Remove the object and maintain a
	system	distance of 31.5 in. (80 cm) from
		the detection system lattices.
	Books not properly secured	Retest with a properly secured
		book.
	System failure	Place a service call to 3M.
Patron counter did not increment	Incomplete walk through test	Retest by walking through the
		corridor.
		The light beam between the
		photocell and the reflector in the
		corridor must be interrupted to
		increment the patron counter.
	Patron counting is configured for	Retest by walking through the
	counting in the other direction	corridor in the opposite direction.
	(for example, exiting instead of
	entering)
	System failure	Place a service call to 3M.
Patron count too high or too low	Patron counting is configured	See Patron counting on page 11.
	differently than expected.	Retest to verify patron counting
		is configured correctly for your
		library and the system orientation.*
In a multiple-corridor installation,	Power to only part of the detection	For detection systems with more
some lattices seem to be working	system	than four corridors, both ends
while other lattices do not		of detection system must be
		connected to power.

* Patron counting direction (or whether patrons are counted entering and exiting) must be configured by a 3M trained technician.

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