Bunn U3A - Manual (Page 11)

Page 11
PROBABLE CAUSE
1. Fuse
2. Tank Heater(s)
1. Timer
2. Start Switch
1. Timer
2. Solenoid Valve
3. Lime build-up in swing spout
and pump tubing.
1. Filters
2. Hole in bottom of funnel ob-
structed.
3. Pump - Flow Rate
4. Soft Water
TROUBLESHOOTING (cont.)
PROBLEM
Fuse opening
Water keeps running from swing
spout
Inconsistent coffee yield
Funnels overflow
REMEDY
Refer to Service - Fuse for testing
procedures. See page 16
Refer to Service - Tank Heater for
testing procedures. See page 25
Refer to Service - Timer for testing
procedures. See page 26 or 28
Refer to Service - Start Switch for
testing procedures. See page 23
Refer to Service - Timer for testing
procedures. See page 26 or 28
Refer to Service - Solenoid Valve
for testing procedures. See page
22
Remove swing spout and insert
deliming rod down into pump tub-
ing as far as possible.
Use Bunn ® filters made for the U3
brewer.
Remove obstruction.
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.
When using a water softener, a
coarse grind of coffee may be pre-
ferred. If required, a bypass sys-
tem is available as an optional
feature.
10060.3 070102