Bunn STA TROUBLESHOOTING cont PROBLEM, Beverage overflows dispenser cont Weak beverage, Remedy

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TROUBLESHOOTING (cont.)

PROBLEM

Beverage overflows dispenser (cont.)

Weak beverage

Dry coffee grounds remain in the funnel

Brewer is making unusal noises (ST, STF, STA & STFA)

PROBABLE CAUSE

3.Solenoid valve (ST, STF, STA & STFA)

1.Filter type

2.Coffee grind

3.Sprayhead

4.Funnel loading

5.Water temperature

1. Funnel loading

1.Solenoid valve

2.Plumbing lines

REMEDY

Remove the Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 18

The BUNN® paper filter must be used for proper extraction.

A fine or drip grind must be used for proper extraction.

A six-hole stainless steel spray- head must be used for proper extraction.

The BUNN® paper filter must be centered in the funnel and the bed of ground leveled by gentle shak- ing.

Place an empty funnel on an empty dispenser beneath the sprayhead. Initiate a brew cycle and check the water temperature immediately below the sprayhead with a ther- mometer. The reading should not be less than 195° F. Adjust the control thermostat to increase the water temperature. Replace if nec- essary.

The BUNN® paper filter must be centered in the funnel and the bed of grounds leveled by gently shak- ing.

The nut on the solenoid must be tight or it will vibrate during op- eration.

Plumbing lines should not resting on the counter top.

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29251 052500

 

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Contents ST,STA STF,STFA POST OFFICE BOX SPRINGFIELD, ILLINOISFAX BUNN S,SAUSER NOTICES WARRANTY#02763.0000 #02765.0000 #02769.0000 USER NOTICES Continued#00656.0000 #00882.0000Models S & SA ELECTRICAL REQUIREMENTSPLUMBING REQUIREMENTS Electrical Hook-Up4C. Models STF & STFA INITIAL SET-UP4A. Models S & SA 4B. Models ST, STAOPERATING CONTROLS CLEANINGModels ST, STF, STA & STFA ON/OFF SWITCH START SWITCHTROUBLESHOOTING REMEDY TROUBLESHOOTING contPROBLEM PROBABLE CAUSETROUBLESHOOTING cont PROBLEM Dripping from sprayhead Beverage overflows dispenser cont Weak beverage Brewer is making unusal noises Contents SERVICECOMPONENT ACCESS CONTROL THERMOSTAT SERVICE contSERVICE cont CONTROL THERMOSTAT cont SERVICE cont LIMIT THERMOSTAT ON/OFF SWITCH Models ST, STA, STF & STFA FIG. 8 SOLENOID START SWITCH Models ST, STA, STF & STFA SERVICE cont TANK HEATER SERVICE cont TANK HEATER Cont FIG. 14 BREW TIMER SERVICE cont BREW TIMER Early Modelscont FIG. 16 DIGITAL BREW TIMER DIGITAL BREW TIMER Late ModelsSERVICE cont DIGITAL BREW TIMER Late Modelscont LIQUID LEVEL CONTROL BOARD Models STF & STFA STFACont SERVICE cont TIMER RELAY Models STF & STFA SERVICE cont WARMER ELEMENTS SERVICE cont THERMAL CUT-OFFModels SA, STA & STFA 29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page