Bunn CDBC Operating & Service Manual page 18

TROUBLESHOOTING (cont.)
BREWING CIRCUIT (cont.)
PROBLEM
Brew cycle will not start (cont.)
Consistently low beverage level in
the dispenser or beverage over-
flows dispenser
PROBABLE CAUSE
8. Control board or dispense valve
(CDBC & CEZ)
1. Brew volume (CDBC & CEZ)
2. Lime build up
3. Dispense Valve
Page 18
REMEDY
If the start switch (CEZ) or switch
panel (CDBC) is operating prop-
erly, proceed as follows. Attach a
voltmeter to the terminals of the
dispense solenoid. Connect the
brewer to the power source. Turn
on the brewer and press the BREW
switch. Voltage should be present
at the solenoid terminals. If volt-
age is not present, refer to the
wiring diagrams and check the
wiring harness. If voltage is
present, check for continuity
across the terminals of the sole-
noid coil. If continuity is not
present, replace the solenoid (See
page 27). If continuity is present,
the valve may be stuck closed.
Set up brewer according to in-
structions in section Adjustments -
Brew Volumes. (See pages 7 or 8)
Using a stop watch or second hand,
time the length of the brew cycle.
Record this time inside the top lid.
If service is ever needed again, use
the time as reference to determine
if time has changed.
Inspect the dispense valve and
sprayhead for excessive lime de-
posits. Delime as required.
Remove dispense valve and clear
any obstructions. Rebuild or re-
place valve if necessary. (See page
27)
29319 091203