Bunn POWDER AUTO FILL service manual Service, Component Access

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SERVICE

This section provides procedures for testing and replacing various major components used in this dis- penser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified ser- vice personnel. The dispenser should be unplugged when servicing, except when electrical tests are re- quired and the test procedure specifically states to plug-in the dispenser.

COMPONENT ACCESS

WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replace- ment of any component.

All components are accessible by opening the door, removal of the door panel, removal of the dispenser rear panel, hopper, hopper support plate and top wrap- around cover. Refer to Fig. 1

P1891

FIG. 1 COMPONENT LOCATIONS

Contents
Auger Drive Components	13
Auger Motor	14
Frother and Mixing/Whipper Chamber	15
Whipper Motor	16
Control Board and Level Probes	18
TEST/SERVICE Switch	21
Main Power ON/OFF Switch	22
Door Panel Assembly
Lamp Cord Assembly	23
Lamp Cord Connector	24
Lamp Holder/Socket	25
Transformer	26
Potentiometer	27
Hopper Level Indicator	28
Hopper Switch	29
Door Switch	30
Pressure Regulator and Needle Valve	31
Dispense Solenoid	32
Wiring Diagrams	33

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Contents Bunn Powder Auto Fill Warranty Initial SET-UPIntroduction User Notices Operating Instructions Adjustments Cleaning Recommended Daily Cleaning and Maintenance TipsRinse and dry each item thoroughly before reas- sembling Fault List Normal operation Powder Auto-Fill ready toDispense Door not closedTroubleshooting Problem Probable Cause Problem Remedy CDS product tastes watery or sugary Problem Probable Cause Remedy Procedures. See Improper adjustment of productInstall a regulator if necessary to Product overflows CDS hopper Control Board and ProbeService Component AccessAuger Drive Components Hopper LidRetainer Clip Spacer Dust Seal Hopper BaseDiagrams and check wiring harness Auger Drive MotorFrother and MIXING/WHIPPER Chamber Mixing ChamberWhipper Motor Volts ac for 120 volt models Volts ac for 230 volt CE modelsInstall dispense tip into the bottom of the whipper chamber Whipper MotorIf voltage is present as described, proceed to #5 If voltage is present as described, proceed to #9Test Procedure Low Product Detect Instal the new control board using the four #6-32 keps nuts Remove the control boardTEST/SERVICE Switch Disconnect the wires from the switch terminalsLocation Main Power ON/OFF Switch Main Power ON/OFF SwitchLamp Cord Assembly Refer to when reconnecting the wiresLamp Cord Connector Disconnect the lamp cord from the lamp cord connectorRemove new nut and washer from new lamp cord connector Lamp HOLDER/SOCKET Assembly Close the dispenser doorTransformer TransformerPotentiometer PotentiometerHopper Level Indicator Hopper Level IndicatorHopper Switch Hopper SwitchDoor Switch Door SwitchAdjustments Pressure Regulator and Needle ValveDispense Solenoid Valve Dispense Solenoid Valve LocationWiring Diagrams Schematic Wiring Diagram PAF BLK REDWiring Diagrams Schematic Wiring Diagram Pafa