Bunn 34766.0000S Left Pump Fault, CHK Pump Wiring, CHK RPM Sensor CHK Tubing Area RT Pump Fault

Page 29

Troubleshooting (Continued)

Screen Displayed

 

Possible Cause

Troubleshooting Procedures

 

 

 

 

 

 

 

 

EVAP TEMP SENSOR

1.

Corresponding Temperature Sensor

Service Required

 

 

OUT OF RANGE

 

Probe wire(s) shorted to housing, or

 

 

 

 

 

 

 

 

to each other.

 

 

 

 

CHECK WIRE FOR

 

 

 

 

 

 

SHORTS

2.

Evaporator temperature too high.

Service Required

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEFT PUMP FAULT!

1.

Motor failure

Service Required

 

 

CHK PUMP WIRING

2.

RPM Sensor failure

Service Required

 

 

 

 

 

 

 

CHK RPM SENSOR

 

 

 

 

 

 

CHK TUBING AREA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RT PUMP FAULT!

1.

Motor failure

Service Required

 

 

CHK PUMP WIRING

2.

RPM Sensor failure

Service Required

 

 

 

 

 

 

 

CHK RPM SENSOR

 

 

 

 

 

 

CHK TUBING AREA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

installation. Clean probes

 

 

 

 

2.

Machine dispensing continously

Dispense

switch

failure,

Service

CHK DISP SWITCHES

 

 

Required

 

 

 

CHK CONNECTIONS

3.

Water flowing continously

Dispense

valve

leaking,

Service

 

 

 

 

 

Required

 

 

 

 

 

 

 

 

 

 

 

 

 

JUMPER FAULT!

1. Invalid wire harness configuation

Service Required

 

 

CONFIG NOT VALID

 

 

 

 

 

 

CHECK J-18

ON CONTROL BOARD

29

34766 010407

 

Image 29
Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisBUNN-O-MATIC Commercial Product Warranty Introduction Contents00656.0001 User Notices37881.0000 28181.0003 11646.0002 40054.0000Models without Master ON/OFF Switch Field Wiring Terminal Block DiagramModels with Master ON/OFF Switch Electrical RequirementsInitial SET-UP Plumbing RequirementsElectrical HOOK-UP Plumbing HOOK-UPReprogramming the Dispenser Flow Rate Setting Dispenser Flow RateRemoving the restrictors Dispense Selecting the Correct Pump TubingRate Oz/sec 16 I.D. Tubing1513 Operating Controls and InterfaceInitial Fill & Heat Alarm Mode FlavorGard FeatureRinse Alarm Feature Brew Temperature Lockout Feature BIB Empty Lockout FeatureMenu Screen Action Description Tank Temp Programming the Dispenser351 + Exit 3/16RT Disp Volume LF Disp VolumeMenu Screen Lock Flavor ? Exit YES Flavors Locked 0oz +Exit + Menu Screen Tank TempReady Temp Cabinet TempRinse Time ? 12 Hrs + Menu ScreenAction Description CAL Left Pump ? Pull DispenseCAL Right Pump ? Pull Dispenser Menu Screen ActionCAL RT WTR Flow Pull Dispenser CAL Right Side ? Exit YESWTR Stop Delay WTR Start DelayTest LED’S ? No Exit YES Test Switches ? Test Refill ? Exit YESPriming the Concentrate Lines Loading the ConcentrateFilling Cambros or other large containers Operating the Pull & Hold DispenserModels LCA-2 PC, LCA-2C PC, LCA-2A PC Operating the Preset Portion Control DispenserGeneral Cleaning and Sanitizing Procedures Daily Rinsing Cleaning & Preventative MaintenanceDaily Parts Washing Weekly SanitizingReplacing the Pump Tubing Preventive MaintenanceDraining the HOT Water Tank Front Panel LED Display Messages TroubleshootingPower LED OFF Left Refill LED on Internal FaultConcentrate BIB is Empty Empty BIB WarningPossible Cause Troubleshooting Dispenser Diagnostics-LCD DisplayScreen Displayed Possible Cause CHK Pump Wiring Left Pump FaultCHK RPM Sensor CHK Tubing Area RT Pump Fault CHK RPM Sensor CHK Tubing Area Cooler FaultCalibrating the Left Side Dispenser Oz/sec 53 ml/sec w/ flow restrictor Field Calibrating the Hot Water Flow RateOz/sec 74 ml/sec w/o flow restrictor Calibrating the Right Side DispenserCalibrating The Empty BIB Threshold Field Calibrating the Empty BIB WarningVolts AC 2 Wire Schematic Wiring Diagram LCC-2A/LCA-2A/LCA-2A, PC

34766.0000S specifications

The Bunn 34766.0000S is a commercial-grade coffee maker that stands out for its efficiency and precision in brewing. Designed for high-volume environments such as restaurants, cafes, and offices, this coffee brewer is engineered to deliver a consistent and robust coffee flavor with every brew.

At the heart of the Bunn 34766.0000S is its unique brewing system, which employs a patented technology to optimize extraction. This system ensures that water is heated to the ideal temperature, usually around 200°F, for optimal flavor extraction from coffee grounds. The precise temperature control is essential in commercial settings, where the quality of coffee can significantly affect customer satisfaction.

The Bunn 34766.0000S features a stainless steel construction, which not only enhances its durability but also allows for easy cleaning and maintenance. The sleek design fits comfortably in any kitchen setting, and its compact size makes it suitable for countertops with limited space. With a 12-cup capacity, this machine is capable of producing multiple pots of coffee quickly, ensuring that demand is met during peak hours.

One of the standout features of the Bunn 34766.0000S is its Smart Brew technology. This innovative feature allows for customizable brewing settings, enabling users to adjust brew strength and flavor profiles according to their specific preferences. The machine includes a programmable timer, which can be set for automatic brewing, a significant advantage for businesses that require coffee to be ready at specific times.

Additionally, the Bunn 34766.0000S comes equipped with a built-in water tank, which keeps water at the optimal brewing temperature for instant coffee production. This feature minimizes waiting times and ensures that coffee is always fresh.

In terms of safety, the Bunn 34766.0000S is fitted with an advanced safety shut-off mechanism to prevent overheating and ensure that the machine operates within safe temperature limits. This reliability is crucial for busy establishments where operational efficiency is paramount.

In summary, the Bunn 34766.0000S is an exceptional choice for businesses looking for a dependable, high-quality coffee brewing solution. It combines innovative brewing technologies, user-friendly features, and a robust design to meet the demands of any commercial environment, making it an indispensable tool for serving delicious coffee consistently.