Bunn FMD-3 service manual Problem Probable Cause, Remedy

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TROUBLESHOOTING (cont.)
PROBLEM	PROBABLE CAUSE
Product will not dispense	1.	No water
	2.	No power or incorrect voltage to
	the dispenser

3. Dispense switch

4. Dispense solenoid valve (Hot or Cold)

5. Solenoid valve (Inlet)

REMEDY

Water lines and valves to the dis- penser must be open.

(A1) Check for 120 volts across the black and white wires on two wire 120 volt dispenser.

(A2) Check for 120 volts across the red and white wires and the black and white wires on three wire 120/ 240 volt dispenser.

(A3) Check for 240 volts across the white and black wires on two wire 240 volt dispenser.

(B) Check circuit breakers or fuses.

Refer to Service - Dispense Switch for testing procedure. See page 17

Refer to Service - Dispense solenoid valve for testing procedures. See page 29 or 30

Refer to Service - Solenoid Valve (Inlet) for testing procedures. See page 31

6.	Level control board and probe	Refer to Service - Level Control Board
		and Probe for testing procedures.
		See page 24
7.	Overflow protection switch	Refer to Service - Overflow protec-
		tion switch for testing procedures.
		See page 27
8.	Auger drive	Refer to Service - Auger Drive. See
		page 12

7	28364 011598

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Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisFMD-2 FMD-3 BUNN-O-MATIC Commercial Product WarrantyFMD-2 00656.0000 00831.000028368.0000 26536.0002Initial SET-UP Plumbing HOOK-UP Initial Fill & HeatDraining the HOT Water Tank Remedy Problem Probable CauseReplacement Control thermostat TroubleshootingStat for testing procedures. See Cold Product overflows container Dispense switchDripping from dispense tip Lime build-up LeaksProbable Cause Remedy ProblemDisplay not lit Lamp Lamp Holder Starter Lamp Ballast Refer to Service Lamp, see page 23 for lamp replacementDispenser is making unusual Noises Water Supply Tank Heater Excess dust FanContents Component AccessAuger Drive Components Auger Drive Shaft Optional Bushing Ejector Elbow Hopper Lid Auger Wire Agitator Disc AssyIf voltage is present as described, proceed to #5 Off of the auger drive shaftRemove dust seal 18 from auger motor Auger Drive ComponentsBallast Refer to when reconnecting the wiresHarness BLK to BLU From Door Interconnect Control Thermostat Remove temperature probe from the tankControl Thermostat Dispense SwitchLocation FAN Dispense SwitchLocation Washer Ring Nut Frother FANFrother and Whipper Motor Steam Collector Ring Mixing Chamber #8-32 Acorn NutFrother and Whipper Motor Whipper Motor Terminals P1451.40 Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalRemove the outside window and display graphic Lamp Replacement Refer to FigLamp Holder Door Assy Upper Panel Lamp Holders Lower PanelLamp Starter and Socket As assemblyLevel Control Board and Level Probe Level Control Board and Level Probe Limit Thermostat Limit ThermostatFrom Main Harness Overflow Protection SwitchBoard RINSE/RUN Switch Rinse /RUN SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsSolenoid Valve Inlet Solenoid Valves DispenseTank Heater Solenoid Valve InletTank Heater Switch Main Wiring Thermostat HarnessTank Heater Tank Heater Switch Terminals Tank Heater SwitchSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3