Bunn CDBCF Airpot Operating & Service Manual page 17

TROUBLESHOOTING (cont.)
BREWING CIRCUIT (cont.)
PROBLEM
Brew cycle will not start (cont.)
Consistently low beverage level in
the dispenser or beverage overflows
dispenser
PROBABLE CAUSE
8. Control board or dispense valve
(CDBC-APS/TC/TS/TSR & CEZ-
APS/TS/TSR)
1. Brew volume (CDBC-APS/TC/TS/
TSR & CEZ-APS/TS/TSR)
NOTE: All volumes to run with
sprayhead attached.
2. Lime build up
3. Dispense Valve
Page 17
REMEDY
If the start switch (CEZ-APS/TS/
TSR) or switch panel (CDBC-APS/
TC/TS/TSR) is operating properly,
proceed as follows. Attach a volt-
meter to the terminals of the dis-
pense valve 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 voltage
is not present, refer to the wiring
diagrams and check the wiring har-
ness. If voltage is present, check for
continuity across the terminals of
the solenoid coil. If continuity is not
present, replace the solenoid valve
(See page 26). If continuity is
present, the valve may be stuck
closed.
Set up brewer according to instruc-
tions 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
26)
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