Bunn LCR-3 service manual Possible Cause Troubleshooting Procedures, No Display

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Troubleshooting

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

Only qualified service personnel should perform inspection, testing, and repair of electrical equipment.

Shorting the terminals or the application of external voltages to electronic components may result in component or circuit board failure.

Intermittent operation of electronic circuit boards is unlikely. board failure will normally be permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose wire connection at a terminal or crimp.

Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for more than ten minutes without a supply of water.

The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help avoid twists and kinks in the tubing.

Make certain that all plumbing connections are sealed and all electrical connections are tight and isolated.

This dispenser is heated at all times. Keep away from combustibles.

WARNING:

Exercise extreme caution when servicing electrical equipment.

Disconnect the brewer from the power source when servicing, except when electrical tests are specified.

Follow recommended service procedures.

Replace all protective shields or safety notices.

Screen Displayed

Possible Cause

Troubleshooting Procedures

 

 

 

NO DISPLAY

No Power to the Dispenser

Check Master ON/OFF Switch

 

 

Check Power Cord & Circuit Breaker

 

 

Service Required

 

 

 

 

 

 

HEATING

Water temp is below the preset

Wait for water temp to rise

Please Wait!

READY temp

Check Ready Temp. threshhold setting

 

 

Service Required

 

 

 

 

 

 

RINSE REQUIRED

Rinse Alarm Time Interval has

Rinse Dispenser, see Rinse Procedure

 

expired

Replace BIB, see Loading the Concentrate

 

 

 

 

 

 

XXXX BIB EMPTY

Concentrate BIB is empty.

Replace BIB, see Loading the Concentrate

Replace BIB Soon

BIB not properly connected.

Check BIB Connector Fittings

 

Tubing kinked or blocked.

Check Tubing Installation

 

Empty BIB Threshhold too high.

Check Empty BIB Threshhold, see Field

 

 

Calibrating the Epmty BIB Warning

 

 

 

 

 

 

____ TARGET RPM

The calculated Target RPM for

Check Pump & Flow Rate Calibration, refer

TOO HIGH !!

the pump indicated is out of

to Field Calibration Procedures

 

range

 

 

 

 

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Contents LCR-3 HV Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents IntroductionUser Notices Moving PartsElectrical Requirements Field Wiring Terminal Block Diagram Plumbing RequirementsPlumbing HOOK-UP Initial SET-UPElectrical HOOK-UP Leveling the DispenserDrip Tray Installation Operating Controls and Interface Initial Fill & Heat Rinse Procedure Rinse Alarm FeatureAlarm Level Alarm Mode Energy Saver Mode BIB Empty Lockout FeatureBrew Temperature Lockout Feature Optional 2- Product OperationProgramming the Dispenser Programming HRS + BibEMPTY LockoutSaver Tank Temp No Exit Action CAL Middle Pump ? CAL MID Pump VOL LCD Display Actiondescription CAL Left Pump ? LeftCAL HI WTR VOL LCD Display Xxoverflow WTR Start DelayWTR Stop Delay Test Refill ? Exit YES Test Heater ?Loading the Concentrate Priming the Concentrate LinesTo Dispense Hot Water Operating the DispenserFilling Cambros or Other Large Containers Weekly Sanitizing Cleaning & Preventative MaintenancePreventive Maintenance Weekly Refrigeration AIR FilterReplacing the Pump Tubing Draining the HOT Water Tank Possible Cause Troubleshooting Procedures TroubleshootingNo Display Water TOO LOWHeating Check for BAD ConnectionsScreen Displayed Possible Cause Calibrating the Left Concentrate Pump Dispenser Flow Rate CalibrationField Calibrating the Empty BIB Warning Schematic Wiring Diagram