Bunn Fast Cup Series Service & Repair Manual page 10

TROUBLESHOOTING
MACHINE MESSAGES, SYMP-
TOMS and/or ACTIVE NOTICES
Symptoms
15. Water Dripping On Counter
16. Unusual Machine Noise
PROBABLE CAUSE
a. Hydraulic Module: Improper tube
installation, length or cutting of tube
b. Drip tray connection to drain fitting
c. Drain tube connection to drain
fitting
a. Latch disengagement & lower brew
piston returning to bottom/start position
(Thump Sound)
b. Heightened latch disengagement noise
c. Brew pump motor RPM increasing
(Higher Pitch Sound)
d. Internal water pressure regulator, out
of adjustment, worn or failure
(Obnoxious Vibration Sound)
10
REMEDY
a. Locate leak, release tube from push-
in fitting and inspect tube length and
end for straight cut. Re-insert tube into
push-in fitting until it stops. If necessary,
replace tube
b. Clean or replace drip tray o-rings.
Ensure drain tube and clamp is properly
positioned onto drain fitting stem
and secured firmly with clamp
a. Normal
b. Confirm all machine legs are flat on
the counter surface
c. Perform cleaning procedure.
Locate obstruction that is causing brew
pump to increase motor rpm to maintain
dispense flow rate
d. Try adjusting regulator before replac-
ing regulator. Factory setting is 20psig.
Note: Regulator Specification is 1 -
25psig.
Approximate 20psig setting without
use of pressure gauge: Rotate handle
clockwise until it stops, rotate handle
counter clockwise 7 1/2 full turns and
tighten lock nut.
Continued >