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SERVICE (cont.)
DIGITAL BREWER CONTROL BOARD AND DISPLAY
(DBC) (cont.)
heater relay or triac. ("0" means the temperature
will be allowed to vary by the value in "set relay
temperature difference")
7. If you cannot access the DBC with the password
you have entered, the password has been changed.
If you know what the brew settings are you can
"reset" the memory back to the way it left the
factory, which is "0". This is accomplished by
disconnecting the brewer from the power source,
pressing the plus (+) and minus (-) buttons simul-
taneously and holding them in this position then
connecting the brewer to the power source. Con-
tinue pressing the buttons until the display shows
numbers counting upward rapidly. If this does not
occur press the plus (+) and minus(-) firmly and
repeat the procedure. The brew values can now be
set to your desired value.
8. If the brew volume does not match the pro-
grammed value then use the following list to
correct the error.
A) The coffee grounds naturally absorb some of
the brew water; typically between one and two
ounces of water per ounce of coffee (depending on
the grind).
B) The DBC calculates the amount of time the brew
solenoid must stay on to dispense the programmed
brew volume. It uses the sprayhead constant to
determine the rate of dispense. The sprayhead rate
can be measured by capturing the water coming
out of the sprayhead for 60 seconds. This value (in
gallons per minute) can be entered into memory.
C) The last reason can be the brew by-pass. If you
are using brew by-pass then the amount that
comes out of the by-pass must be subtracted from
the total desired volume to get the programmed
brew volume.
9. If your DBC display is blank, you should check the
following.
A) Make sure brewer is connected to the power
source.
B) Make sure connectors that go between the main
DBC and the DBC display are plugged into their
appropriate locations.
C) Restart the DBC program by disconnecting
brewer from the power source, wait 15 seconds
and reconnect the brewer to the power source.
D) If these do not remedy the problem, replace
Digital Brewer Control Board
10. If water is running out from the base of the brewer
check the following:
A) If the display shows temperature or FAULT 6 ,
disconnect the brewer from the power source. If
water continues to flow out of the base of the
brewer there may be an obstruction in the refill
solenoid valve. Refer to Refill Solenoid Valve ser-
vice procedures.
B) With the brewer disconnected from the power
source, remove panels as necessary, dry inside of
brewer as needed, and reinstall panels on brewer.
C) Reconnect brewer to the power supply. If water
continues to flow out of the base, the Digital
Brewer Control Board is defective and must be
replaced.
Removal and Replacement:
DBC Control Board
1. Disconnect the brewer from the power source.
2. Disconnect all wires from the control board.
3. Remove the two #8-32 keps nuts securing control
board to component bracket inside the trunk.
4. Remove control board and discard,
5. Install new control board on the component bracket
using two #8-32 keps nuts.
6. Reconnect the multi-pin plugs to the control board.
DBC Display Assembly:
1. Disconnect the display assembly cord from the
display assembly.
2. Remove the two #6-32 locking screws securing
the display assembly to the display assembly
mounting bracket behind the front of the hood.
3. Remove display assembly from the front of the
hood and discard.
4. Install new display assembly on the front of the
hood using two #6-32 locking screws to secure it
to the display assembly mounting bracket.
5. Reconnect the display assembly cord to the dis-
play assembly.
NOTE: If necessary recalibrate the values of the
DBC using the FUNCTION LIST (supplied).
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