Bunn STF Coffeemaker User Manual


 
Page 10
TROUBLESHOOTING (cont.)
PROBLEM
Dripping from sprayhead
Water flows into tank continuously
(ON/OFF Switch "ON")
Water flows into tank continuously
(ON/OFF Switch "OFF")
Beverage overflows dispenser
PROBABLE CAUSE
1. Syphon system
2. Lime build-up
CAUTION - Tank and tank compo-
nents should be delimed regularly
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)
1. Timer (ST, STF, STA & STFA)
2. Start switch
3. Liquid level board
4. Relay
1. Solenoid valve (ST, STF, STA &
STFA)
1. Dispenser
2. Timer (ST, STF, STA & STFA)
REMEDY
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
Remove the solenoid valve and
clear any obstructions. Rebuild or
replace the valve if necessary.
See page 18
Refer to
Service -
Timer for testing
procedures. See page 22 or 24
Refer to
Service
- Start Switch for
testing procedures. See page 19
Refer to
Service
- LiquidLevel
Board for testing procedures. See
page 26
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
The dispenser must be completely
empty before starting a brew cycle.
Refer to
Service -
Timer for testing
procedures. See page 22 or 24
29251 052500