Bunn HC-3 service manual Ballast, Location, Test Procedure

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SERVICE (cont.)

BALLAST
FIG. 4 BALLAST	P1199.40
FIG. 4 BALLAST
Location

The front door lamp ballast is located on the front center of the base behind the front panel.

Test Procedure

1.Disconnect the dispenser from the power source.

2.Disconnect the two terminal plug of the door in- terconnect harness from the connector of the ballast.

3.Check the voltage across the white wire and the blue wire terminal of the ballast with a voltmeter. Connect the dispenser to power source. The in- dication must be:

a)120 volts ac for two wire 120 volt models.

b)120 volts ac for three wire 120/208 volt models or 120/240 volts models.

c)240 volts ac for two wire 240 volt models.

If voltage is present as described the ballast is oper- ating properly.

If voltage is not present as described, replace the ballast.

Removal and Replacement

1.Disconnect the wires from the ballast.

2.Remove the two #8-32 keps nuts securing the ballast to the dispenser base.

3.Remove and discard ballast.

4.Install new ballast over the two weld studs on the dispenser base and secure with two #8-32 keps nuts.

5.Refer to the illustration below when reconnect- ing the wires.

WHI to Main	BLK to Terminal Block
WHI to Main
Wiring Harness
WHI & BLU to
Door
Interconnect
Harness
120V, 120/208V, & 120/240V Models
	WHI to Main
	Wiring Harness
RED & BLU to
Door
Interconnect
Harness
	BLK to Terminal Block
	240V Models
	P1202.45
FIG. 5 BALLAST TERMINALS

15	27591 031597

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Contents Serial # HC00025000 UP Bunn HC-2Introduction WarrantyUser Notices 12368.000227620.0000 Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPCold Beverage SET-UP Optional CleaningAdjustments Dispenser USETroubleshooting Draining the HOT Water TankHopper 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 ServiceTest Procedure BallastLocation 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 Replacement Refer to Fig Lamp HolderDoor 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 TerminalsSolenoid Valves Dispense Disconnect the water line from the solenoid valveSolenoid Valve Inlet Tank Heater Solenoid Valve InletRefer to when reconnecting the wires to the tank heater Tank Heater SwitchTank 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