Bunn FMD-1 - Manual (Page 7)

7
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 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.
• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help
to avoid twists and kinks in the tubing.
• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
• This unit is heated at all times. Keep away from combustibles.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
Product will not dispense 1. No water
2. No power or incorrect voltage to
the dispenser
3. Dispense switch
4. Dispense solenoid valve
Water lines and valves to the dis-
penser must be open.
(A1) Check the outlet for 120 volts
on two wire 120 volt dispenser.
(A2) Check the outlet for 120 volts
on three wire 120/240 volt dispenser.
(B) Check circuit breakers or fuses.
Refer to Service - Dispense Switch
for testing procedure. See page 16
Refer to Service - Dispense solenoid
valve for testing procedures. See
page 26
PROBLEM PROBABLE CAUSE REMEDY
28364 041598