Bunn S, Operating & Service Manual

Page: 9 / 44

Page 9
TROUBLESHOOTING (cont.)
PROBLEM
Inconsistent beverage level in dis-
penser (cont.)
Consistently low beverage level in
the dispenser (ST, STF, STA &
STFA)
Spitting or excessive steaming
PROBABLE CAUSE
3. Syphon system
4. 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.
5. Water pressure (ST, STF, STA
& STFA)
1. Timer
2. Strainer/flow control (.222
GPM)
1. 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.
2. Control thermostat
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.
The water pressure to the brewer
must be at least 20 psi (138 kPa).
(A) Early models-Timer dial must
indicate at least two minutes and
fifteen seconds.
(B) Refer to
Service - Digital Timer
for testing procedures. See page
24
(A) Direction of flow arrow must
be pointing towards brewer.
(B) Remove the strainer/flow con-
trol and check for obstructions.
Clear or replace.
Inspect tank assembly for exces-
sive lime deposits. Delime as re-
quired.
Refer to
Service - Control Ther-
mostat for testing procedures. See
page 14
29251 052500