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31

PROBLEM

PROBABLE CAUSE

REMEDY

Water flows into tank continuously 

with power removed from brewer.

1. Refill valve

2. Refill probe or sensitivity setting

3. Control Board

Foreign material lodged in valve, 

holding it in open state.

Check the sensitivity setting. Refer 

to the 

REFILL

 function. If the left 

three digit number is less than the 

right number, the machine “thinks” 

it is full and the refill valve should 

be off.  If the left number is larger 

than the right, then the refill valve 

will automatically be turned on to 

fill the tank. The right number is 

the threshold setting and can be 

adjusted to compensate for ex-

treme water conditions: very pure, 

low conductance water requires a 

higher setting, while high mineral 

content, high conductance water 

requires a lower setting. Note that 

the left number changes from a high 

value when water is NOT touching 

the refill probe to a low valve when 

water IS touching the probe. For 

best operation, the right number 

should be set to a value midway 

between these low and high num-

bers. Before changing the setting, 

confirm that the refill probe is free 

of scale buildup and the connection 

to it is secure.

Substitute a control board known 

to be in good working order.

TROUBLESHOOTING

 (cont.)

Summary of Contents for ICB SH

Page 1: ...Parts Catalog Programming Manual or Service Manual please visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the latest catalog and manual updates F...

Page 2: ...en do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive option while the equip...

Page 3: ...sturdy counter or shelf The Infusion Series combines BrewWISE and CDBC into one ICB SH and ICB Twin SH are able to brew coffee with recipe settings They have an LCD for digital readout and programming...

Page 4: ...Ads Disabled Disabled Enable Sanitation Disabled Disabled Enable Energy Saver Disabled Disabled Enable Fresh Timer Disabled Disabled Refill 155 155 Left Spray Oz X 40 0 Right Spray Oz X 41 0 Spray Oz...

Page 5: ...5 Server Detect Enabled Enabled SH Empty Detect Enabled Enabled SH Heat Auto Off Disabled Disabled Server Preheat Enabled Enabled Server Indicators Enabled Enabled FACTORY DEFAULTS cont ICB ICB TWIN...

Page 6: ...NEW RECIPE CALIBRATION SPRY HEAD CAL BYPASS CAL L SPRY OZ M XX X L BYPS OZ M XX X R SPRY OZ M XX X R BYPS OZ M XX X SETTINGS SERVICE SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT DON...

Page 7: ...EL DETECT SERVER DETECT SH EMPTY DETECT SH HEAT AUTO OFF SERVER PREHEAT ENABLE FRESH TIMER ENABL ENERGYSAVR ENABL ADS BREW ALERT SERVER INDICATORS SERVICE SELECT SELECT METRIC DONE ENG SELECT COLUMN A...

Page 8: ...TPUTS TEST SWITCHES TEST FREQUENCY ENTER ASSET ENTER SERVICE BREW COUNTERS SELECT SELECT SELECT SELECT SELECT SELECT SELECT COLUMN B X REFILL XXX DONE FACTORY DEFAULTS NO YES PROGRAMMING FUNCTIONS FLO...

Page 9: ...ect press SAVE The display will read AD MESSSAGE SETUP COMPLETE The ad is now stored in the brewer s memory 6 If the ad is not correct or it is desired to exit the setup before the ad is loaded into t...

Page 10: ...e level 2 function screens press and hold the right hidden button for approximately 5 seconds Release when the display reads SET LANGUAGE This function allows the operator to select the language used...

Page 11: ...will be different ex Brew oz will become Brew liters Temperature changes from F to C REVIEW RECIPES Modify or Show recipes This function has two parts 1 It allows the operator to view the brew settin...

Page 12: ...ll return to the recipe name just viewed 4 To see the settings again select SHOW To change settings select MODIFY Then the screen will display BREW OZ and a batch light will be blinking 5 Using or set...

Page 13: ...ULSEBREWDISABLED After a 5 second delay the display will read 3 BATCHES DONE INITIAL SPRAY INITIAL SPRAY ALTERNATES UNTIL BREW CYCLE IS COMPLETED PRE INFUSION REMAINING ON ON TIME OFF TIME OFF TIME OF...

Page 14: ...ch sizes and repeat step 27 29 When finished setting all batch sizes press and release DONE The display should read 3 BATCHES DONE 30 The display will read SH TEMP XXX 31 Using or set temp for SH Serv...

Page 15: ...D REVIEW RECIPES SET PULSE BREW DRIP TIME 0 30 SELECT METHOD NO NAME COFFEE BREW OZ 64 BYPASS 20 SH TEMP XXX FRESH X XX HRS NO YES NO YES DONE EASY MANUAL MODIFY SHOW NEXT DONE DONE DONE DONE PROGRAMM...

Page 16: ...tored recipes in the brewer s memory until the desired recipe name is reached 7 Select DONE to set that recipe for brew switch B 8 ThedisplayshouldnowreadSELECTRECIPEBREW SWITCH C and then BREAKFAST B...

Page 17: ...with a NO and YES If the name on the display is correct press YES 6 If for some reason the name of the coffee from the grinder did not load properly into the funnel or if a grind has not yet been don...

Page 18: ...proceed to step 13 10 The display will now read A with a flashing cursor belowit PresstheSCROLLbuttontoscrollthrough the alphabet and available characters When the desired character is shown on the di...

Page 19: ...SAVED and then will return to the NEW AD screen 19 To correct or edit the ad select EDIT The display should now read WRITE TOP LINE Repeat steps 10 though 17 20 To save the ad as it is shown select YE...

Page 20: ...REDUCED TEMPERATURE dependingonthesettings Thisscreenwillalternate with PRESS ANY SWITCH TO RE HEAT ENABLE FRESH TIMER This function allows the operator to enable the Fresh ness Alert and set the exp...

Page 21: ...til the display reads CALIBRATION then press SELECT Press and release the right hidden switch until the display reads SPRY OZ M The number represents what the brewer thinks is the flow rate out of tha...

Page 22: ...1 7 to calibrate the other side 9 To exit the CALIBRATE FLOW function and advance to the next screen select NO To exit programming and return to the MAIN SCREEN press either ENABLE BREW ON OFF switch...

Page 23: ...om pleted This counter is non resettable Press NEXT to advance to the next brew counter BREW A left side 3 This counter represents the number of brews for Brew A on the left side of the brewer To rese...

Page 24: ...to the next digit in the phone number 4 Repeat Step 3 until the entire number is entered 5 Press and release DONE The display will now read BREW COUNTERS SERVICE FOR AUTHORIZED SERVICE PERSONNEL ONLY...

Page 25: ...is saving the settings to your brewer When completed the screen will read SAVE COMPLETE REMOVE DRIVE Procedure for loading new software versions into brewers 1 Place new software file from computer o...

Page 26: ...ermanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to t...

Page 27: ...re Sensor Probe wire s broken or not making connection 1 Temperature Sensor Probe wire s shorted to housing or to each other 1 No power or incorrect voltage A Wait for the brewer to heat to the proper...

Page 28: ...ck Test the ON OFF switch Test the BREW switch Test the brew valve Substitute a control board known to be in good working order Checkplumbingandshut offvalves 1 No water 2 No power or incorrect voltag...

Page 29: ...igh mineral content high conductance water requires a lower setting Note that theleftnumberchangesfromahigh value when water is NOT touching the refill probe to a low valve when waterIStouchingtheprob...

Page 30: ...the refill solenoid Connect the brewer to the power source Press theON OFFswitchtoturnthebrewer on Within five seconds voltage should be present at the solenoid terminals If voltage is not present ref...

Page 31: ...ed on to fill the tank The right number is the threshold setting and can be adjusted to compensate for ex treme water conditions very pure low conductance water requires a higher setting while high mi...

Page 32: ...ng should be 15 3k 2k OHMS at 70 F 21 C the reading should be 11 8k 2k OHMS and at 80 F 27 C the reading should be 9 3k 2k OHMS If the probe is withintheseparameters reconnect to the control board Rem...

Page 33: ...bath of approximately 70 F 21 C Connect an ohmmeter to the pins in the connector At 60 F 16 C the reading should be 15 3k 2k OHMS at 70 F 21 C the reading should be 11 8k 2k OHMS and at 80 F 27 C the...

Page 34: ...me buildup If bypass is being used on the in consistent brewing recipe test the bypassvalve Refertotestoutputs Turnthevalveonfor30secondsand collect the water collected from the funnel Repeatthetestse...

Page 35: ...for each brew cycle The mounting screws on the so lenoids must be tight or they will vibrate during operation Plumbinglinesshouldnotberesting on the countertop The brewer must be connected to a cold w...

Page 36: ...ndthebedof grounds leveled by gently shaking Empty the server remove its cover and place the server beneath the sprayhead Placeemptyfunnelover theserverentrance notinthefunnel rails Press brew Check t...

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