Bunn LCR-3 service manual Screen Displayed Possible Cause

Page 24

Troubleshooting (Continued)

Screen Displayed

Possible Cause

Troubleshooting Procedures

COOL TEMP SENSOR OUT OF RANGE

CHECK FOR BAD CONNECTIONS

CHECK WIRE FOR SHORTS

1.

Cold Sensor wire(s) shorted to housing,

Service Required

 

or to each other.

 

2.

Product cabinet temperature too

Service Required

 

high.

 

3.

Product cabinet temperature too low.

Service Required

EVAP TEMP SENSOR

1.

Evaporator temperature too high or too

OUT OF RANGE

 

low.

 

 

 

 

2.

CorrespondingEvaporatorSensorProbe

CHECK FOR BAD

CONNECTIONS

 

wire(s) broken or disconnected.

CHECK

 

 

3.

Corresponding Temperature Sensor

WIRE FOR

SHORTS

 

Probe wire(s) shorted to housing, or

 

 

 

 

 

to each other.

Service Required

Service Required

Service Required

COOLER FAULT!

1.

Cabinet circulating fan failure

Service Required

 

 

EVAP TEMP TOO HI

2. Ice build up on evaporator coils

Service Required

 

 

 

 

 

 

 

CHECK

EVAP FAN

 

 

 

 

 

 

CHK EVAP SENSOR

3.

Evaporator sensor failure

Service Required

 

 

 

 

 

 

 

 

 

 

 

COOLING TIME

1.

Air intake filter clogged

Clean Air Filter

 

 

TOO LONG

2.

Wiring failure

Check wiring harness for breaks,

 

 

 

CHECK

AIR FILTER

 

 

shorts, open connectors

 

CHECK COOLING UNIT

3.

Compressor failure

Service Required

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COND PROBE FAULT

1.

Concentrate buildup on probes

Check pump & tubing for proper

CHECK COND PROBES

2.

Machine dispensing continously

installation. Clean probes

 

 

 

 

Dispense

switch

failure,

Service

CHK DISP SWITCHES

3.

Water flowing continously

Required

 

 

 

CHK CONNECTIONS

Dispense

valve

leaking,

Service

 

 

 

 

 

Required

 

 

 

 

 

 

 

 

 

 

JUMPER FAULT!

1. Invalid wire harness configuation

Service Required

 

 

CONFIG

NOT VALID

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHECK J-18

ON CONTROL BOARD

24

41129 052208

 

Image 24
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 RequirementsInitial SET-UP Electrical HOOK-UPPlumbing HOOK-UP Leveling the DispenserDrip Tray Installation Operating Controls and Interface Initial Fill & Heat Rinse Alarm Feature Rinse ProcedureAlarm Level Alarm Mode BIB Empty Lockout Feature Brew Temperature Lockout FeatureEnergy Saver Mode Optional 2- Product OperationProgramming the Dispenser Programming BibEMPTY Lockout HRS +Saver Tank Temp No Exit Action LCD Display Actiondescription CAL Left Pump ? Left CAL Middle Pump ? CAL MID Pump VOLCAL HI WTR VOL WTR Start Delay WTR Stop DelayLCD Display Xxoverflow Test Refill ? Exit YES Test Heater ?Loading the Concentrate Priming the Concentrate LinesOperating the Dispenser To Dispense Hot WaterFilling Cambros or Other Large Containers Cleaning & Preventative Maintenance Preventive MaintenanceWeekly Sanitizing Weekly Refrigeration AIR FilterReplacing the Pump Tubing Draining the HOT Water Tank Troubleshooting Possible Cause Troubleshooting ProceduresNo Display TOO LOW HeatingWater Check for BAD ConnectionsScreen Displayed Possible Cause Calibrating the Left Concentrate Pump Dispenser Flow Rate CalibrationField Calibrating the Empty BIB Warning Schematic Wiring Diagram