Bunn CDBCF CDBCP - Manual (Page 14)

Page 14
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY
HEATING CIRCUIT
1. Display flashing (CDBC) or ready
light flashing (CEZ)
2. Water not touching tempera-
ture probe
3a. Dry Plug In Probe Sensing
System (CDBC)
3b. Dry Plug In Probe Sensing
System (CEZ)
Brewer has shut down due to
malfunction (See Diagnostic Chart
in manual, Page 19, or under top
lid).
Remove probe and grommet. Look
into hole on tank lid. Water must
be within one inch from top of
tank.
A) Disconnect the brewer from the
power source. Disconnect the J3
connector from the control board.
Check for continuity from the tank
mounting screw where the green
wire mounts, to pin 2 of the plug,
continuity should be present. Pull
the temperature probe up about
an inch from the grommet. Check
for continuity from the outside
surface of the temperature probe
and pin 4 of the plug, continuity
should be present. Connect the J3
plug to the control board and pro-
ceed to step 4a.
B) Disconnect the brewer from the
power source. Disconnect the J5
connector from the control board.
Check for continuity from the tank
mounting screw where the green
wire mounts, to pin 5 of the plug,
continuity should be present. Pull
the temperature probe up about
an inch from the grommet. Check
for continuity from the outside
surface of the temperature probe
and pin 2 of the plug, continuity
should be present. Connect the J5
plug to the control board and pro-
ceed to step 4b.
Water does not heat to proper
temperature
IMPORTANT: Make sure no tem-
perature tests are taken before the
ready light is "ON". Tank tempera-
ture must be stabilized before read-
ings are taken.
29079 042803