Bunn STA, STFA TROUBLESHOOTING cont, Problem, Probable Cause, Remedy, Dripping from sprayhead

Page 10

TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Dripping from sprayhead

1. Syphon system

The brewer must be level or slightly

 

 

lower in front to syphon properly.

 

2. Lime build-up

Inspect the tank assembly for ex-

 

CAUTION - Tank and tank compo-

cessive lime deposits. Delime as

 

nents should be delimed regularly

required.

 

depending on local water condi-

 

 

tions. Excessive mineral build-up

 

 

on stainless steel surfaces can ini-

 

 

tiate corrosive reactions resulting

 

 

in serious leaks.

 

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

Remove the solenoid valve and clear any obstructions. Rebuild or replace the valve if necessary.

See page 18

Water flows into tank continuously

1.

Timer (ST, STF, STA & STFA)

Refer to Service - Timer for testing

(ON/OFF Switch "ON")

 

 

procedures. See page 22 or 24

 

2.

Start switch

Refer to Service - Start Switch for

 

 

 

testing procedures. See page 19

 

3.

Liquid level board

Refer to Service - LiquidLevel

 

 

 

Board for testing procedures. See

 

 

 

page 26

 

4. Relay

Water flows into tank continuously

1. Solenoid valve (ST, STF, STA &

(ON/OFF Switch "OFF")

STFA)

Refer to Service - Relay for testing procedures. See page 28

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

Beverage overflows dispenser

1.

Dispenser

The dispenser must be completely

 

 

 

empty before starting a brew cycle.

 

2.

Timer (ST, STF, STA & STFA)

Refer to Service - Timer for testing

 

 

 

procedures. See page 22 or 24

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29251 052500

 

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Contents BUNN S,SA POST OFFICE BOX SPRINGFIELD, ILLINOISFAX ST,STA STF,STFAWARRANTY USER NOTICES#00882.0000 USER NOTICES Continued#00656.0000 #02763.0000 #02765.0000 #02769.0000Electrical Hook-Up ELECTRICAL REQUIREMENTSPLUMBING REQUIREMENTS Models S & SA4B. Models ST, STA INITIAL SET-UP4A. Models S & SA 4C. Models STF & STFASTART SWITCH CLEANINGModels ST, STF, STA & STFA ON/OFF SWITCH OPERATING CONTROLSTROUBLESHOOTING PROBABLE CAUSE TROUBLESHOOTING contPROBLEM REMEDYTROUBLESHOOTING cont PROBLEM Dripping from sprayhead Beverage overflows dispenser cont Weak beverage Brewer is making unusal noises COMPONENT ACCESS SERVICEContents SERVICE cont CONTROL THERMOSTATSERVICE 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 DIGITAL BREW TIMER Late Models FIG. 16 DIGITAL BREW TIMERSERVICE 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 Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251