Bunn HC-3 service manual Fan, Test Procedures

Page 19

SERVICE (cont.)

FAN

P1199.45

FIG. 10 FAN

Location:

The fan is located inside the front panel, mounted on a plate beneath the hopper mounting plate.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the black and white wires from the black leads on the fan.

3.Check the voltage across the black and white wires on the main harness or transformer with a voltmeter. Connect the dispenser to the power source. The indication must be:

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

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

c)120 volts ac for two wire 240 volt models.

If voltage is present as described, replace the fan

If voltage is not present as described, refer to wiring diagram and check the dispenser wiring harness.

Removal and Replacement:

1.Remove hoppers from the dispenser. Refer to Fig. 2 for hopper removal.

2.Remove the four #8-32 screws securing the hop- per mounting plate to the front panel and remove panel.

3.Remove the four screws securing the fan mount- ing plate to the dispenser front panel.

4.Lift fan mounting plate out of the front panel far enough so the fan leads can be disconnected from the main wiring harness.

5.Remove fan mounting plate, fan and exhaust tube as an assembly.

6.Remove the four #8-32 screws and four #8-32 nuts securing exhaust tube and fan to the bottom of the fan mounting plate and discard fan.

7.Install new fan and the exhaust tube to the bottom of the fan mounting plate using four #8-32 screws and four #8-32 nuts.

NOTE: Be sure arrow on the new fan is pointing down.

8.Set fan mounting plate with fan and exhaust tube inside the front panel far enough to connect the black leads from the fan to the black and white leads on the main wiring harness.

9.Install fan mounting plate into position and secure with four #8-32 screws.

10.Install hopper mounting plate using four #8-32 screws.

11.Install hoppers, refer to Fig. 2.

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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
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