Bunn Fast Cup Series Service & Repair Manual page 12

TROUBLESHOOTING
MACHINE MESSAGES, SYMP-
TOMS and/or ACTIVE NOTICES
Hydraulic Module Active Notices
19. Brew Error Pump Timeout, Push-out
Timeout or Flow Limit
Grinder Module Active Notices
Left, Center and Right
20. Over Current
21. No Current
PROBABLE CAUSE
a. Main water supply or water filtration
system
b. Restricted brew chamber filter screens
c. Water pump
a. Foreign object in grind chamber
b. Grinder motor (shorted)
a. Tripped grinder circuit breaker
b. Grinder motor failure
12
REMEDY
a. Ensure adequate incoming water
pressure
b. Perform cleaning procedure or replace
brew chamber filter screens.
c. Enter Water System tab under Service
icon. Test water pump by adjusting Wa-
ter Pump Rate to see increase in water
pressure psig
a. Remove and clean grind chamber
and verify grinder circuit breaker is not
tripped
b. Enter Grinders tab under Service icon.
Without a load on the coffee burrs, turn
on grinder motor and monitor current on
the display. Motor current should not
exceed the 3 Amp breaker rating
a. Check for obstruction in the grinder
chamber causing breaker to trip
b. From the motor red wires, place meter
leads across the two red wires to check
motor TCO for continuity.
Place meter across Black and White
grinder motor wires, the resistance
reading should be around 40.5 Ohms
Continued >