Bunn CWT-TSR Troubleshooting, Problem Probable Cause Remedy, Must be open, Ts, Cwt-Tsr &Cwtf-Tsr

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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.

Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltages may result in 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 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 to avoid twists and kinks in the tubing.

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

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

WARNING – • Exercise extreme caution when servicing electrical equipment.

Unplug the brewer when servicing, except when electrical tests are specified.

Follow recommended service procedures

Replace all protective shields or safety notices

PROBLEM

PROBABLE CAUSE

REMEDY

Brew cycle will not start (CWT-

1. No water

Water lines and valves to the brewer

APS, CWTF-APS, CWT-TS, CWTF-

 

must be open.

TS, CWT-TSR &CWTF-TSR)

 

 

2.No power or incorrect voltage to the brewer

(A1) Check the terminal block for

120 volts across the black and white terminals on two wire 120 volt brewers.

(A2) Check the terminal block for

120 volts across the red and white terminals and the black and white terminal on three wire 120/240 volt brewers.

(A3) Check the terminal block for

200 volts on "B Series" brewers or

240 volts on "A Series" brewers across the red and black termi- nals.

(A4) Check the terminal block for

100 volts on "B Series" brewers across the white and black termi- nals.

(B) Check circuit breakers or fuses.

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10690 091596

 

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Contents CWT-TSR Introduction WarrantyUser Notices Plumbing Requirements Electrical RequirementsElectrical Hook-Up Models CW-APS & CWT-TSEarly MO Dels W/OUT Fauc ET Plumbing RequirementsThird Type Models W/FAUCET Models CWTF-APS, CWTF-TS CWTF-TSR4A.Models CW-APS & CW-TS Initial SET-UP6A.Models CW-APS & CW-TS 8A.Models CWA-PS & CW-TSON/OFF Switch Adjusting Brew VolumesStart Switch Operating ControlsCleaning Coffee Brewing5A.Models CW-APS & CW-TS Problem Probable Cause Remedy TroubleshootingBrew cycle will not start CWT No water Must be openProblem Probable Cause Remedy TroubleshootingCWTF-TS, CWT-TSR &CWTF TSRCWTF-TSR ProblemBeverage overflows dispenser Spitting or excessive steaming Dripping from sprayheadControl Thermostat Syphon System Lime Build-up DispenserCWTF-TS, CWT-TSR, CWTF-TSR CWT-APS, CWTF-APS, CWT-TSRemove and clean lime off the tank heater. See CWT-TS, CWTF-TS, CWT-TSR CWTF-TSRBrewer is making unusal noises Tank Heater Service Component AccessContents Control Thermostat ServiceLimit Thermostat Service Control ThermostatON/OFF Switch Test Procedures Disconnect the brewer from the power source Solenoid ValveLocation Start Switch Terminals Start SwitchTank Heater Tank HeaterService Tank Heater Tank Heater Switch Tank Heater SwitchTank Heater Switch Terminals Service Tank Heater SwitchDisconnect the black and white wires to the sole- noid Service TIMEREarly ModelsOLD Style Service TimerIf voltage is as described, proceed to #7 Digital Brew Timer Late ModelsTimer Setting Service Digital Brew Timer Late Modelscont10690 10690 10690 10690 10690