Bunn TWIN APS, Operating & Service Manual

Page: 17 / 32

Page 17
Brew cycle will not start (cont.)
Consistently low beverage level in
the dispenser or beverage over-
flows dispenser
TROUBLESHOOTING (cont.)
PROBABLE CAUSE REMEDY
If the switch panel is operating
properly, proceed as follows. At-
tach 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 voltage 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 24). If continuity is present,
the valve may be stuck closed.
Set up brewer according to in-
structions in section
Adjustments-
Brew Volumes . (See page 8) Us-
ing 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
24)
8. Control board or dispense valve
1. Brew volume
2. Lime build up
3. Dispense Valve
BREWING CIRCUIT (cont.)
PROBLEM
36672 030104