Bunn FMD-3 Beverage Dispenser User Manual


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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
Technical Service Department.
• Inspection,testing,andrepairofelectricalequipmentshouldbeperformedonlybyqualiedserviceperson-
nel.
• Allelectroniccomponentshavehighvoltage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ttings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specied.
• Followrecommendedserviceprocedures
• Replaceallprotectiveshieldsorsafetynotices
PROBLEM
Product will not dispense
PROBABLE CAUSE
1. No water
2. No power or incorrect voltage to
the dispenser
3. Dispense Switch
4. Digital Touch Control Switch
5. Dispense Solenoid Valve
6. Solenoid Valve (Inlet)
REMEDY
Water lines and valves to the dis-
penser must be open.
(A) Check for correct voltage to the
dispenser.
(B) Check circuit breakers or fuses.
Refer to Service - Dispense Switch for
testing procedure. See page 28
Refer to Service - Digital Touch
Control Switch for testing procedure.
See page 29
Refer to Service - Dispense Solenoid
Valve for testing procedures. See
page 47
Refer to Service - Solenoid Valve
(Inlet) for testing procedures. See
page 49
42672 122209
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