6
TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Tech-
nical Service Department.
• Inspection, testing, and repair of electrical equipment should be performed only by qualified service per-
sonnel.
• All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of
terminals or the application of external voltages may result in board failure.
• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
• Make certain that all electrical connections are tight and isolated.
WARNING
•
Exercise extreme caution when servicing electrical equipment.
•
Turn power OFF when servicing, except when electrical tests are specified.
•
Follow recommended service procedures.
•
Replace all protective shields or safety notices.
Remedy
Remove the cover plate located on
the right side of the housing. Press
the red “Reset” button. Listen care-
fully for a “click”. This resets the
motor protection circuit and indi-
cates that an overload may have
been encountered by the motor. (An
overload can occur when something
other than coffee is inserted into the
hopper for grinding.) Refer to
Ser-
vice - Motor for disassembly pro-
cedures. See page 9.
Check the voltage at the power cord
with a voltmeter. Voltage must be:
(A) 120 volts across the black and
white wires for 120 volt models.
(B) 240 volts across the black and
red/black wires for 240 volt models.
(A) Momentarily place the switch in
the “START” (right) position.
(B) Refer to
Service - Off/On/Start
Switch for testing procedures. See
page 11.
Problem
Grinder will not start.
Probable Cause
1. Motor overload protector
2. No power or incorrect voltage
3. Off/On/Start switch
10171 121597