Bunn S, Operating & Service Manual

Page: 11 / 44

Page 11
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.
29251 052500