Bunn TU3Q service manual Problem Probable Cause Remedy

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TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Weak beverage (cont.)

4. Funnel Loading

The BUNN¨ paper filter must be

 

 

centered in the funnel and the bed

 

 

of tea leaves leveled by gentle shak-

 

 

ing.

 

5. Water Temperature

Place an empty funnel on an empty

 

 

dispenser beneath the sprayhead.

 

 

Initiate a brew cycle and check the

 

 

water temperature immediately be-

 

 

low the sprayhead with a thermom-

 

 

eter. The reading should not be less

 

 

than 200°F (93°C). Adjust the con-

 

 

trol thermostat to increase the wa-

 

 

ter temperature. Replace if neces-

 

 

sary.

 

6. Low Brew Water Volume

Adjust needle valve to achieve 76

 

 

oz. water from the sprayhead. To

 

 

increase volume, turn counter-

 

 

clockwise. To decrease volume,

 

 

turn clockwise.

Dry tea leaves remain in the funnel

1. Funnel Loading

The BUNN¨ paper filter must be

 

 

centered in the funnel and the bed

 

 

of tea leaves leveled by gently shak-

 

 

ing.

Brewer is making unusual noises

1. Solenoid(s)

The nut on the solenoid(s) must be

 

 

tight or it will vibrate during opera-

 

 

tion.

 

2. Plumbing Lines

Plumbing lines should not be rest-

 

 

ing on the counter top.

 

3. Water Supply

(A) The brewer must be connected

 

 

to a cold water line.

 

 

(B) Water pressure to the brewer

 

 

must not exceed 90 psi (621 kPa).

 

 

Install a regulator if necessary to

 

 

lower the working pressure to ap-

 

 

proximately 50 psi (345 kPa).

 

4. Tank Heater

Remove and clean lime off the tank

 

 

heater. See page 23.

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Contents Phone 217 529-6601 FAX 217 TU3QBUNN-O-MATIC Commercial Product Warranty ContentsIntroduction #00831.0000 #00656.0000 User Notices#03408.0002 #03409.0002 #03408.0000 #03536.0000 #03409.0000 Plumbing Requirements Electrical RequirementsElectrical Hook-Up Auto Sweetener SET-UP Initial SET-UPAuto Sweetener SET-UP Adjusting Brew VolumesAuto Sweetener Cleaning CleaningOperating Controls TEA Brewing Problem Probable Cause TroubleshootingRemedy Problem TroubleshootingProbable Cause RemedyProblem Probable Cause Dripping from sprayhead Beverage overflows dispenser Brew TimerSyphon System Lime Build-up DispenserProblem Probable Cause Remedy Component Access ServiceTest Procedures Disconnect the brewer from the power source ServiceBrew Solenoid Valve Solenoid valveWiring Diagram and check the wiring harness Brew Timer Early ModelsIf voltage is as described, proceed to #7 Service Digital Brew Timer Late ModelsDigital Timer Wiring Control Thermostat Control ThermostatLimit Thermostat Limit ThermostatRefer to when reconnecting the wires Location ON/OFF SwitchSwitch terminals On the switch terminalStart Switch Start SwitchTank Heater Sweetener Solenoid Valve Optional OFF/SELECTOR Switch Volts AC 2 Wire Single Phase Schematic Wiring Diagram TU3QVolts AC Wire