Bunn HC-3 service manual Troubleshooting, Problem Probable Cause Remedy

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TROUBLESHOOTING (cont.)
PROBLEM	PROBABLE CAUSE	REMEDY
Product will not dispense	1. No water	Water lines and valves to the
		dispenser must be open.
	2. No power or incorrect voltage to	(A1) Check the terminal block for
	the dispenser	120 volts across the black and
		white terminals on two wire 120
		volt dispenser.
		(A2) Check the terminal block for
		120 volts across the red and
		white terminal and the black and
		white terminal on three wire
		120/240 volt dispenser.
		(A3) Check the terminal block for
		240 volts across the white and
		black terminal on two wire 240
		volt dispenser.
		(B) Check circuit breakers or
		fuses.
	3. Dispense switch	Refer to Service - Dispense
		Switch for testing procedure.
		See page 18
	4. Dispense solenoid valve	Refer to Service - Dispense
	(Hot or Cold)	solenoid valve for testing proce-
		dures. See page 30 or 31
	5. Solenoid valve (Inlet)	Refer to Service - Solenoid Valve
		(Inlet) for testing procedures.
		See page 32
	6. Level control board and probe	Refer to Service - Level Control
		Board and Probe for testing
		procedures. See page 26
	7. Overflow protection switch	Refer to Service - Overflow
		protection switch for testing
		procedures. See page 28
	8. Auger drive	Refer to Service - Auger Drive.
		See page 12

7	27591 031597

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Contents Serial # HC00025000 UP Bunn HC-2Introduction Warranty12368.0002 User Notices27620.0000 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USEDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Problem Probable Cause Remedy TroubleshootingProblem Ing in serious leaks Problem Probable CauseDripping from dispense tip Lime build-up On stainless steel surfaces canTip with a thermometer Weak product Water temperatureTesting procedure. See 30 orProbable Cause Remedy Troubleshooting ProblemAuger Drive Components ServiceComponent Access ContentsHopper Assy Auger Drive ComponentsIf voltage is present as described, proceed to #5 Washer Auger Motor Locknut Dust Seal Shoulder ScrewRight HC-2 ServiceBallast Test ProcedureLocation Electronic Thermostat Optional Remove temperature probe from the tankControl Thermostat Location Mechanical ThermostatThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresPull the mixing chamber 2 out of the whipper chamber Frother and Whipper MotorSteam Collector #6-32 Screw Mixing Chamber RingWhipper Motor Terminals Frother and Whipper MotorReconnect the eight pin connector to the hopper delay board Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalLamp Holder Lamp Replacement Refer to FigDoor Assy Service Level Control Board and Probe Level Control Board and Level ProbeLimit Thermostat Level Board TerminalsOverflow Protection Switch Overflow Protection SwitchRUN/RINSE Switch RUN/RINSE SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsDisconnect the water line from the solenoid valve Solenoid Valves DispenseSolenoid Valve Inlet Tank Heater Solenoid Valve InletTank Heater Switch Refer to when reconnecting the wires to the tank heaterTank Heater Tank Heater Switch Terminals Tank Heater SwitchMODELSONLYcont Transformer 240V TWO WireSchematic Wiring Diagram HC-2, & HC-3 Schematic Wiring Diagram HCA-2, & HCA-3