Bunn SRU Operating & Service Manual page 13

TROUBLESHOOTING (cont.)
PROBLEM
Funnel overflows (cont.)
Coffee reservoir overflows
Brewer is making unusal noises
PROBABLE CAUSE
4. Soft Water
1. Coffee reservoir not completely
empty before a brew cycle was
started.
2. Timer
3. Pump - Flow Rate
1. Solenoid Valve
2. Plumbing lines
3. Water supply
4. Tank Heater(s)
Page 13
REMEDY
When using a water softener, a
coarse grind of coffee may be pre-
ferred. If required, a bypass system
is available as an optional feature.
Be sure coffee reservoir is empty
before brew cycle is started.
Refer to Service -Timer for testing
procedures. See page 31 or 33
Check pump flow rate with a watch.
Pump flow rate should be approxi-
mately 24 ounces in 15 seconds. Be
sure pump assembly is free of any
obstructions.
The nut on the solenoid must be tight
or it will vibrate during operation.
Plumbing lines should not be resting
on the counter top.
(A) The brewer must be connected
to a cold water line.
(B) Water pressure to the brewer
must not exceed 90 psi (621 kPa).
Install a regulator if necessary to
lower the pressure to approximately
50 psi (345 kPa).
Remove and clean lime off the tank
heater. See page 29
10067 080200