3033-006B Section 6: The Coffee System
Concordia Xpress Technical Support Manual 6-13
2900-300B
Viewing the Left Piston Movement
1. Navigate to TEST ROUTINES > LEFT DRIVE.
2. Under normal operating conditions, the piston location should
display approx 362-363.
3. Use the increase value/decrease value arrows to move the
piston.
4. As the piston moves, the piston location number will change.
5. As the piston magnet moves across the Hall-Effect sensor, an
“L” will appear on the display and the sensor LED will illuminate.
Removing the Left Piston
1. Remove the bean hoppers.
2. Remove the top panel from the machine.
3. Remove the funnel.
4. Remove the grounds chute.
5. Using a 4mm Allen wrench, remove the lower piston set screw,
located at the bottom end of the lower piston nylon shaft.
6. Disconnect the brew line from the product nozzle.
7. Navigate to TEST ROUTINES > LEFT DRIVE and drive the
lower piston up as far as it will go, then down as far as it will go.
8. Insert your hand into the brew chamber from the bottom. You
should feel the bottom of the nylon shaft. Push shaft upward until
lower piston head has cleared top of chamber.
9. Using a towel, grab piston head and pull upward until brew line is
clear of chamber.
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