Bunn CDBCF CDBCP - Manual (Page 13)

Page 13
TROUBLESHOOTING (cont.)
Fill or refill does not shut "OFF"
(ON/OFF Switch "ON")
Fill or refill does not shut "OFF"
(ON/OFF Switch "OFF")
PROBABLE CAUSE REMEDY PROBLEM
1. Lime build up on probe (all
models)
2a. Water Level Probe Sensing
System (CDBC)
2b. Water Level Probe Sensing
System (CEZ)
3. Refill valve or control board (all
models)
1. Refill valve or control board (all
models)
Remove Probe and check for lime
deposits on tip. Clean and reinstall.
A) Disconnect the brewer from the
power source. Disconnect the J3
connector from the control board.
Check for continuity from the nut
on top of the level probe to pin 1 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 proceed to step 3.
B) Disconnect the brewer from the
power source. Disconnect the J5
connector from the control board.
Check for continuity from the nut
on top of the level probe 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 proceed to step 3.
Press ON/OFF switch to "ON" (In-
dicator lamp should be lit). If wa-
ter continuously flows out of air
vent tube, disconnect the brewer
from the power source. If water
flow stops, replace the control
board. If water flow does not stop,
repair or replace the refill sole-
noid. (See page 30)
If water continuously flows out of
air vent tube, disconnect the
brewer from the power source. If
water flow does not stop, repair or
replace the refill solenoid. If the
valve closes when power is re-
moved, replace the control board.
(See pages 21 & 22)
REFILL CIRCUIT (cont.)
29079 042803