Bunn HC-3 service manual Service

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SERVICE (cont.)

LAMP STARTER and SOCKET (120V, 120/208V & 120/240V Models Only)

Location:

The lamp starter (6) is located inside the door assy (1) on the top of the door bottom cover (5).

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the plug on the starter leads from the connector on the door wiring harness.

3.Remove lamp starter from starter socket.

4.Disconnect the two pin plugs of each of the starter sockets from the door wiring harness.

5.Check for continuity on each lead of the starter socket.

If continuity is present as described the starter socket is operating properly.

If continuity is not present as described replace the the starter socket.

6.Remove starter (6) from starter socket.

7.Check for continuity across the pins on the bottom of the starter (6).

If continuity is present as described , replace the starter.

If continuity is not present as described, starter is operating properly.

Note: If continuity test are both as described and lamp does not light, replace the starter socket.

Removal and Replacement (Refer to Fig.16):

1.Open dispenser door assy (1)

2.Remove the six #8-32 screws securing the door bottom cover (5) to the door assy (1).

3.Disconnect the plug on the starter socket and the connector on the door wiring harness.

4.Remove cover (5) with starter w/socket (6) as assembly.

5.Rotate starter 90° and remove from the starter socket.

6.Compress the spring tabs on the socket and re- move socket from the door bottom cover (5).

7.Install new socket by compressing spring tabs on the socket and pushing the socket up through the

hole in the bottom cover (5) and releasing spring tabs.

8.Insert new starter (6) into socket and turn 90° until the pins snap in place.

9.Connect the plug on the sockets leads to the connector on the door wiring harness.

10.Install door bottom cover (5) with starter and starter socket on door assy (1) using six #8-32 screws.

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Contents Serial # HC00025000 UP Bunn HC-2Introduction Warranty12368.0002 User Notices27620.0000 Electrical Requirements Initial SET-UPElectrical HOOK-UP Plumbing RequirementsAdjustments CleaningDispenser USE Cold Beverage SET-UP OptionalDraining the HOT Water Tank TroubleshootingHopper Dispense Rate of Product Problem Probable Cause Remedy TroubleshootingProblem Dripping from dispense tip Lime build-up Problem Probable CauseOn stainless steel surfaces can Ing in serious leaksTesting procedure. See Weak product Water temperature30 or Tip with a thermometerProbable Cause Remedy Troubleshooting ProblemComponent Access ServiceContents Auger Drive ComponentsIf voltage is present as described, proceed to #5 Auger Drive ComponentsWasher Auger Motor Locknut Dust Seal Shoulder Screw Hopper AssyRight HC-2 ServiceBallast Test ProcedureLocation Control Thermostat Remove temperature probe from the tankLocation Mechanical Thermostat Electronic Thermostat OptionalThermostat Terminals Control ThermostatDispense Switch Dispense SwitchFAN Test ProceduresSteam Collector #6-32 Screw Mixing Chamber Frother and Whipper MotorRing Pull the mixing chamber 2 out of the whipper chamberWhipper 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