Bunn S/N SNG0033000 & UP manual Troubleshooting Problem Possible Cause Weak beverage

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TROUBLESHOOTING (cont.)
Problem	Possible Cause
Weak beverage (cont.)	6. Incorrect Recipe

Brewer is making unusual noises.

1. Solenoid (Inlet)

2. Plumbing lines

3. Water Supply

4. Tank Heaters.

Troubleshooting Procedures

Consider adjusting bypass percent- age, preinfusion, or pulse brew. Contact Bunn-O-Matic for sugges- tions.

The nut on back of the solenoid must be tight or it will vibrate during operation

Plumbing lines should not be resting on the counter top.

(A)The brewer must be connected to a cold water line.

(B)Water pressure to the brewer must not be higher than 90 psi (620 kPa). Install a regulator if necessary to lower the working pressure to ap- proximately 50 psi (345 kPa).

Remove and clean lime off tank heaters.

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Contents Single TF DBC Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Table of Contents User Notices 37881.0002 Volt ac single phase Hz modelsElectrical HOOK-UP Electrical Requirements Models without power cord 230 volt ac Single phase, 60 Hz modelsPlumbing HOOK-UP CE RequirementsPlumbing Requirements ON/OFF Switch Enable Brew Main ON/OFF SwitchBatch Selector Switches Brew SwitchInitial Setup Coffee BrewingCleaning Glossary Programming Switches ProgrammingProgramming Switch DRIP-OUT Times Program Functions LevelRecipes Returns to a LevelContinues to D Continues to Program Flow DiagramReturn to a Programming the Brewer Units Setting Units of Measure Procedure for modifying units of measureThis function allows the operator to set Brew Procedure for Setting the RecipeSET NEW Recipe Refer to SET Pulse Brew for description SET NEW RecipesSizes DONE? Procedure to program the coffee name Card Contains Recipe forReview RECIPES? Noyes Next Review RECIPES/MODIFY RECIPES/SET UP no Name Coffee NamesProcedure for reviewing recipes To exit, press Next until the display reads ThatBrew OZ Setting or Adjusting Brew VOL- Umes ScreenBypass Review RecipesSET Pulse Brew Modifying pulse brew Range 1st on time off to 4 minutesNO-NAME Modifyshownext SET Pulse BrewSET Pulse Brew Easy Pulse Setup DONE? SET Pulse Brew Enter TimesTIMES? SET Preinfusion Batches DONE?Setup Complete Assign Recipe ? Enable ADS?Assign Recipes Screen Spray OZ/M SET TempSET Ready Calibrate Spray .. Press Brew to Start Bypass OZ/MCalibrate Flow Start Procedures to calibrate the bypass flow rateCalibrate Flow Brew Counters Procedure to set funnel detectProcedures to view/reset the brew counters Funnel Detect optionalProcedure to test components outputs Service ToolsTesting individual components outputs Brew ValveNothing Pressed FrequencyFactory Defaults Procedure to set factory defaultsScreen Displayed TroubleshootingTroubleshooting Procedures Possible CauseTemperature Press ON/OFF to terminate the cycleTank Heater failure ON/OFF switch was pressed after the brew cycle was startedPress ON/OFF to terminate the brew cycle Triac FailureWater shut off to brewer Temperature Sensor ProbeWires shorted to housing, or to Broken or not making connectionBrew Valve Switch test procedures Equipment will not operate No power or incorrect voltageBrew switch Switch test procedures Data plate within +/- 10%With power removed from brewer Holding it in open state Troubleshooting Problem Possible CauseOverflow Protection Switch When this condition occurs, See above or boilingLimit Thermostat Heating Time TOO LongTroubleshooting Problem Improper water pressure Inconsistent beverage level StrainerServer Pointing towards the brewer 90 psi 138 and 620 kPaLevel in server Consistently high or low beverage Brew Volume adjustmentWater temperature For each brew cycleBrewer is making unusual noises Troubleshooting Problem Possible Cause Weak beverageRemove and clean lime off tank heaters Plumbing lines Water Supply Tank HeatersSchematic Wiring Diagram Single TF DBC Schematic Wiring Diagram Wire Single Phase Schematic Wiring Diagram Single TF DBC

TROUBLESHOOTING (cont.)

Problem

Possible Cause

Weak beverage (cont.)