Appendix E: Preventative Maintenance CDU
Operator Manual
C4000
(Rev 1)
© Hantle 2010
E.1
APPENDIX E: CDU Maintenance
Dispenser Sensor Cleaning Instructions
The Hantle MCDU (and TCDU) dispensers contain several optical sensors
used to count and measure notes as well as time note delivery.
Through normal use, dust can collect on the sending side of the sensor pairs,
causing the readings to skew which can cause C00xx errors.
Depending on environmental conditions at the machine location, Hantle
recommends periodic cleaning of these sensors to prevent errors or to
correct error conditions. Specifically C0083/84/85, C0012 and C002x errors
have been shown to be caused by contaminated sensors. Particularly the
sensors located at the exit gate.
Each sensor pairs contain a sending sensor, and a
receiver. The sending sensor looks like a clear LED
mounted to a circuit board. As shown at right.
To clean the sensor, simply wipe the surface using a
cotton-swab (Q-Tip®) or any clean soft cloth.
It is not necessary or recommended to use a solvent.
Dust contamination is not always visible.