Bunn CDBCF Airpot Operating & Service Manual page 16

TROUBLESHOOTING (cont.)
BREWING CIRCUIT
PROBLEM
Brew cycle will not start
PROBABLE CAUSE
1. Display flashing (CDBC-APS/TC/
TS/TSR) or ready light flashing
(CEZ-APS/TS/TSR)
2. No water
3. No power or incorrect voltage to
the brewer
4. ON/OFF switch not in the "ON"
position
5. Low water temperature (Brew
lockout is enabled)
6. Water not touching refill probe
inside tank
7. Switch panel (CDBC-APS/TC/TS/
TSR)
Page 16
REMEDY
Brewer has shut down due to
malfunction (See Diagnostic Chart
in manual, Page 19, or under top lid
of brewer).
Water lines and valves to the brewer
must be open.
Check for voltage across the black
and white terminals at the terminal
block.
The indicator lamp must be lit
Allow brewer to heat until ready
lamp is lit, or disable the brew lock-
out feature. (See page 7 or 8)
Press ON/OFF switch (indicator
must be lit). Brewer will refill until
water touches probe inside tank.
Water must be in contact with refill
probe before brew cycle will start.
Disconnect the brewer from the
power source. Disconnect the rib-
bon connector from the control
board. Check for continuity between
pins 1 & 2 (An arrow on the connec-
tor indicates pin 1). No continuity
should be present. Press the BREW
switch. Continuity should be present
for as long as the switch is held
"ON". If no continuity is present,
replace the switch membrane
decal.(See page 23)
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