Bunn S/N SNG0033000 & UP Inconsistent beverage level Strainer, Server Pointing towards the brewer

Page 48

TROUBLESHOOTING (cont.)

 

 

Problem

Possible Cause

Troubleshooting Procedures

Spitting or unusual steaming from

3. Electronic control board

Perform the previous procedure

sprayhead or air vents. (Water too

 

for testing triacs. If the voltage

hot) (cont.)

 

measured is very low or zero, then

 

 

substitute a control board known to

 

 

be in good working order.

Inconsistent beverage level in

1. Strainer

(A) Direction of flow arrow must be

server.

 

pointing towards the brewer.

 

 

(B) Remove the strainer and check

 

 

for obstructions. Clear or replace.

 

2. Improper water pressure

Check operating water pressure to

 

 

the brewer. It must be between 20

 

 

and 90 psi (138 and 620 kPa).

 

3. Brew Valve

Test the Brew Valve. Refer to Testing

 

 

Individual Components. Turn the

 

 

valve on for 30 seconds and collect

 

 

the water dispensed from the spray-

 

 

head. Repeat the test several times

 

 

to confirm a consistent volume of

 

 

dispensed water. If not consistent,

 

 

check the valve, tubing and spray-

 

 

head for lime buildup.

 

4. Bypass Valve

If bypass is being used on the

 

 

inconsistent brewing recipe, test

 

 

the Bypass Valve. Refer to Testing

 

 

Individual Components. Turn the

 

 

valve on for 30 seconds and collect

 

 

the water collected from the bypass

 

 

opening. Repeat the test several

 

 

times to confirm a consistent volume

 

 

of dispensed water. If not consistent,

 

 

check the valve, tubing and bypass

 

 

opening for lime buildup.

 

5. Lime buildup

Inspect for lime buildup that could

 

 

block the tank, tank fittings, tubing,

 

 

valves and sprayhead.

Page 48

35879.1 071405

 

Page 47 Page 49
Image 48
Page 47 Page 49
Contents Single TF DBC Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Table of Contents User Notices Volt ac single phase Hz models Electrical HOOK-UP37881.0002 Electrical Requirements Models without power cord 230 volt ac Single phase, 60 Hz modelsCE Requirements Plumbing RequirementsPlumbing HOOK-UP Main ON/OFF Switch Batch Selector SwitchesON/OFF Switch Enable Brew Brew SwitchInitial Setup Coffee BrewingCleaning Glossary Programming Switches ProgrammingProgramming Switch Program Functions Level RecipesDRIP-OUT Times Level Continues to DReturns to a Program Flow Diagram Return to aContinues to Programming the Brewer Units Setting Units of Measure Procedure for modifying units of measureProcedure for Setting the Recipe SET NEW RecipeThis function allows the operator to set Brew SET NEW Recipes Sizes DONE?Refer to SET Pulse Brew for description Procedure to program the coffee name Card Contains Recipe forReview RECIPES? Noyes Review RECIPES/MODIFY RECIPES/SET UP no Name Coffee Names Procedure for reviewing recipesNext 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 SET Pulse Brew Enter Times TIMES?DONE? SET Preinfusion Batches DONE?Setup Complete Enable ADS? Assign RecipesAssign Recipe ? SET Temp SET ReadyScreen Spray OZ/M Bypass OZ/M Calibrate FlowCalibrate Spray .. Press Brew to Start Procedures to calibrate the bypass flow rate Calibrate FlowStart Procedure to set funnel detect Procedures to view/reset the brew countersBrew Counters Funnel Detect optionalService Tools Testing individual components outputsProcedure to test components outputs Brew ValveNothing Pressed FrequencyFactory Defaults Procedure to set factory defaultsTroubleshooting Troubleshooting ProceduresScreen Displayed Possible CauseTemperature Press ON/OFF to terminate the cycleON/OFF switch was pressed after the brew cycle was started Press ON/OFF to terminate the brew cycleTank Heater failure Triac FailureTemperature Sensor Probe Wires shorted to housing, or toWater shut off to brewer Broken or not making connectionEquipment will not operate No power or incorrect voltage Brew switch Switch test proceduresBrew Valve Switch test procedures Data plate within +/- 10%Troubleshooting Problem Possible Cause Overflow Protection Switch When this condition occurs,With power removed from brewer Holding it in open state See above or boilingLimit Thermostat Heating Time TOO LongTroubleshooting Problem Inconsistent beverage level Strainer Server Pointing towards the brewerImproper water pressure 90 psi 138 and 620 kPaConsistently high or low beverage Brew Volume adjustment Water temperatureLevel in server For each brew cycleTroubleshooting Problem Possible Cause Weak beverage Remove and clean lime off tank heatersBrewer is making unusual noises Plumbing lines Water Supply Tank HeatersSchematic Wiring Diagram Single TF DBC Schematic Wiring Diagram Wire Single Phase Schematic Wiring Diagram Single TF DBC
Top Page Image Contents