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Bunn TB3Q-LP service manual Service, Component Access, Contents

Models: TB3Q TB3Q-LP

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SERVICE

SERVICE

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

WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The brewer should be disconnected from the power source when servicing, except when electrical tests are required and the test procedure spe- cifically states to plug-in the brewer.

COMPONENT ACCESS

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

All components are accessible by the removal of the top cover and rear inspection panel.

The top cover is attached with one #6-32 screw. Removal of the top cover will allow access to ON/OFF (UNSWEET/OFF/SWEET) switch, START switch, brew timer, brew solenoid, control thermostat, limit ther- mostat and tank heater.

The rear inspection panel is attached with six #8-32 screws. Removal of the rear panel will allow access to the .750 GPM flow control valve.

Contents
Brew Solenoid Valve	16
Digital Brew Timer	17
Control Thermostat	19
Limit Thermostat	20
ON/OFF Switch	21
Start Switch	22
UNSWEET/OFF/SWEET Switch	23
UNSWEET/OFF/SWEET Solenoid	24
Tank Heater	25
Wiring Diagrams	26

P3034

FIG. 1 COMPONENT ACCESS

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Bunn TB3Q-LP service manual Service, Component Access, Contents

Contents

TB3Q TB3Q-LP BUNN-O-MATIC CORPORATION37236.0000C 05/05 2004 Bunn-O-Matic Corporation Page CONTENTSBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY INTRODUCTIONBREWERS TIMER SETTING USER NOTICESREAD THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCEElectrical Hook-Up Building Officials and Code Administrators International, Inc. BOCAELECTRICAL REQUIREMENTS PLUMBING REQUIREMENTSINITIAL SET-UP AUTO SWEETENER SET-UP ADJUSTING BREW VOLUMES B. Start Switch CLEANINGAUTO SWEETENER CLEANING A. ON/OFF SwitchTEA BREWING Remedy TROUBLESHOOTINGProblem Probable CauseRefer to Service - Brew Timer for testing procedures. See page TROUBLESHOOTING cont PROBLEMPROBABLE CAUSE REMEDYTROUBLESHOOTING cont PROBLEM PROBABLE CAUSEREMEDY TROUBLESHOOTING cont PROBLEM PROBABLE CAUSEREMEDY PROBABLE CAUSE TROUBLESHOOTING contPROBLEM ter temperature. Replace if necesSERVICE COMPONENT ACCESSContents If continuity is not present as described, replace the SERVICE contBREW SOLENOID VALVE solenoid valveSERVICE cont DIGITAL BREW TIMER RED to On/Off Switch SERVICE cont DIGITAL BREW TIMER contTL1 - WHI to Power Cord 100V & 120V or RED to Power Connector 230V andSERVICE cont CONTROL THERMOSTAT BLU/BLK to Control Thermostat BLK to Power Cord or Power Connector SERVICE cont LIMIT THERMOSTATSERVICE cont ON/OFF SWITCH Remove the black and white/violet wires from theblack wire removed from the ON/OFF switch and WHI/YEL to Brew Timer TL5 WHI/ORN to Brew Timer TL3 SERVICE cont START SWITCHWHT/GRN to SERVICE contUNSWEET/OFF/SWEET SWITCH Sweetner Option Timer TL1SERVICE cont SWEETNER SOLENOID VALVE WHI/VIO to Brew Solenoid WHI/VIO to Brew Timer TL1BRN/WHI to Selector Switch Install new tank heater with gaskets on the tank TANK HEATERSERVICE cont Disconnect the black wire and the white or red2 WIRE SCHEMATIC WIRING DIAGRAM TB3QSCHEMATIC WIRING DIAGRAM TB3Q W/SWEETENER 120 VOLTS AC 2 WIRE SINGLE PHASE230 VOLTS AC 2 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM TB3QA