HotCup Operators’ Guide Appendix B

November, 2007 B-3 6740001
Appendix BThe Infrared Mug/Cup Sensor
The infrared mug/cup sensor can sense the presence of a mug or cup without using moving parts.
Indicator light
The sensor is equipped with an indicator light. This light will help you get the best results from the
infrared mug/cup sensor.
Under these conditions:
• Machine door open
• Cup station in place
• No cup in the station
The indicator light should be off. If it is on, it is indicating improper cup station alignment or excessive
sensor sensitivity.
Under these conditions:
• Machine door closed
• Cup station in place
• No cup in the station
Press any letter on the selection switch panel, for example, A. Only the letter A should be showing in
the message display. If “A MUG” is displayed, it indicates one or more of the following:
• Improper cup station alignment
• Excessive sensitivity (the sensor is sensing the delivery door)
• Cup station lens is not clean
Cleaning
As indicated in the Sanitation section, you should remove the cup station to clean it. Pay particular
attention to the dark colored infrared mug/cup sensor lens, which is part of the cup station. If it is not
thoroughly cleaned, the sensor will not work properly.
CAUTION
Do not get liquid inside the sensor unit.
Cleaning the infrared mug/cup sensor unit itself is not usually necessary. If it does require cleaning,
just wipe it with a damp cloth.
Calibration
1. Remove the plastic cap in the rear of the sensing unit, exposing the potentiometer adjusting
screw, as shown in figure B1.
2. Turn the screw clockwise to increase sensitivity of cup detection, or counterclockwise to
decrease sensitivity.