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Problem
Grinder will not start.
Remedy
(A) Plug-in the grinder.
(B) Check the voltage at the wall
outlet with a voltmeter. It must be
120 volts ac for 120 volt models, 100
volts for 100 volt models, and 230
volts for 230 volt models.
(A) Momentarily press the Off/On/
Start switch to the “START”(lower)
position.
(B) Refer to
Service
- Off/On/Start
switch for testing procedures. See
page 14
Press the “Reset” button, located on
rear of the grinder. Listen carefully
for a “click”. This resets the motor
protection circuit and indicates that
an overload may have been encoun-
tered by the motor. (An overload can
occur when something other than
coffee is inserted into the hopper for
grinding). Refer to
Service
- Circuit
Breaker for testing procedure. See
page 9
Refer to
Service
- Timer for testing
procedures. See page 16
Probable Cause
1. No power or incorrect voltage
2. Off/On/Start switch
3. Circuit Breaker (Not applicable on
Model LPG with capacitor)
4. Timer
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
Technical Service Department.
• Inspection, testing, and repair of electrical equipment should be performed only by qualified service
personnel.
• All electronic components have ac voltage and dc voltage 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.
27091 111598