Dirty senor can cause false errors such as Double and Half errors, and may decrease the performance of the Cassida 9900R. It is suggested that the user performs daily maintenance on the unit to maintain top performance. The unit should always be turned off and disconnected from its power cord before cleaning. DO NOT use solvents such as thinner, alcohol, etc. to clean the machine. Most operational problems can be avoided by regular care and preventative maintenance. Taking regular care of the 9900R will significantly increase its lifetime. For best results, it is recommended to use an air duster and a soft bristle brush to remove any dust or debris from the interior of the unit. When not using the machine for an extended period, cover it with the dust cover (not included with the unit) to prevent dust from settling inside.) All parts of the Cassida 9900R need daily care and cleaning. Pay close attention to the sensors, which are delicate components. If any dust or other foreign matter adheres to the sensors, it may cause various problems during operation of the machine.

For additional asistance with how to clean your 9900R see PDF below

9900R Cleaning Procedure

The feed gap is the actual height of the bill feed path and should be tuned to just about the thickness of a single bill. If the feed gap is too wide, the user may experience a high amount of DOUBLE and CHAIN errors which are caused by more than one bill entering the scanning path at one time. If the feed gap is too tight, the unit may not be able to pass bills into the scanning path, or catch on bills and tear them.

For detailed instructions on how to adjust the feed gap of your unit please refer to the link below:

9900R Feed Gap Adjustment Procedure

The Cassida 9900R is designed to detect and flag any suspected counterfeit notes. This unit provides 2-CIS, UV, MG, and IR anti-counterfeit feature detection. To learn more about the detection features on the 9900R refer to the FAQ question, "What do MG, UV, and IR stand for? What's the difference?"

There are a few reasons that a detector may flag genuine currency as a suspect. If bills are worn, bent, torn, or crumpled, the anti-counterfeit features needed to verify a bill as genuine may be compromised. For example, the magnetic ink on a note may wear over time or heavy use, reducing the magnetic response to below detection thresholds. If the 9900R cannot verify the correct features expected on a note, the unit will flag that currency as ‘SUSPECT’.

If sensors are dirty or damaged, the 9900R will not be able to detect the necessary anti-counterfeit features needed to verify currency as genuine.

Another possible reason is that the detection sensors may be incorrectly calibrated, lost reference, or be under operating conditions that cause false positives. In order to reduce these error types, it is advised to operate the unit out of direct sunlight and reduce interference that may cause sensor errors. If this occurs frequently under normal operation, please contact Cassida Technical Support for troubleshooting or service.