Left, Center, Right Grinder Motor - Bunn Fast Cup Series Service & Repair Manual

REAR PANEL
Left, Center & Right Grinder Motor (Module)
Purpose: A total of three grinder motors make up
the grinder module. A grinder motor is positioned
under each hopper station (Left, Center & Right).
After user selects a hopper station and starts a brew
cycle, the grinder motor rotates a bean auger and
coffee burr. The auger helps feed the coffee beans
between the coffee burrs for cutting of the beans.
An EMI filter is clamped around power wires going to
each grinder motor, the EMI is used to suppress high
frequency noise in the circuit.
TEST INSTRUCTION
Enter Service Technician Mode and Select
Service icon
Step 1: Select and enter the Grinders tab.
Step 2: An informational Grinder Status event can
be viewed here under the Grinders tab,
lower right corner.
The Grinder Status event will be highlighted
in green or red text.
Grinder Status Messages
OK (Green Text)
Chamber Overfilled, Scoop
Out Chamber (Red Text)
Piston Error (Red Text)
Hoppers Not Installed
(Red Text)
Brew Chamber Clean
Needed (Red Text)
Step 3: In preparation of grinder motor voltage
test, remove and empty coffee hopper of
beans and reinstall empty hopper.
Step 4: Touch and hold the corresponding Left,
Center or Right Grinder button to operate
grinder (3 second hold run time). The
grinder current can be viewed at the
bottom of the display.
Volt/Ohm Meter - Voltage Check
Step 5: Disconnect or unplug machine from power.
Step 6: Remove right and rear panel to access
grinder motors and circuit boards.
SERVICE
Trigger Event
None
Piston Stall Down Event
Misc. Piston Events
Any Hopper Missing
Grinder Button Pressed >
5 Sec.
Grinder Module
1
4
93
EMI Filter
2
Continued >