Bunn U3 Coffeemaker User Manual


 
Page 34
SERVICE (cont.)
DIGITAL TIMER (Late Models)
BLU/BLK wire from TL5 to P1
WHI/GRN wire from TL4 to (WHI) Pump
WHI/BLU wire from TL3 to (BLK) Pump
WHI wire from TL2 to P2
BLK wire from TL1 to P3
J2 - Three Pin connector from Half/Full Batch
Switch
P2037
FIG. 33 DIGITAL TIMER TERMINALS
NOTE: All volume settings must be done with the
sprayhead installed.
1. Modifying brew volumes. To modify a brew vol-
ume, first check that the SET/LOCK switch is in the
“SET” position on the circuit board.
To increase a brew volume, place the ON/OFF
switch in the “ON” position, press and hold the START
switch until you see three breaks in the water stream
from the swing arm. Release the switch and press it
again one or more times. (Failure to release the switch
within two seconds after the third break in the water
stream causes the volume setting to be aborted and
previous volume setting will remain in memory.) Each
time the switch is pressed, two seconds are added to
the brew time period. Allow the brew cycle to finish
in order to verify that the desired volume has been
achieved.
To decrease a brew volume, place the ON/OFF
switch in the “ON” position, press and release the
START switch once for every two-second interval
to be removed from the total brew time period; then
immediately press and hold down the START switch
until you see three breaks in the water stream from the
swing arm. Release the switch. (Failure to release the
switch within two seconds after the third break in the
water stream causes the volume setting to be aborted
and previous volume setting will remain in memory).
Allow the brew cycle to finish in order to verify that
the desired volume has been achieved.
2. Setting brew volumes. To set a brew volume,
first check that the SET/LOCK switch is in the “SET”
position on the circuit board. Place the ON/OFF switch
in the “ON” position, press and hold the START switch
until you see three breaks in the water stream from
the swing arm and then release the switch. (Failure to
release the switch within two seconds after the third
break in the water stream causes the volume setting
to be aborted and previous volume setting will remain
in memory.)
View the level of the liquid being dispensed. When
the desired level is reached, turn the ON/OFF switch
to “OFF”.
NOTE: The brewer remembers this volume and will
continue to brew batches of this size until the volume
setting procedure is repeated.
NOTE: When brewing coffee, volume will decrease
due to absorption by the coffee grounds.
NOTE: Half-Batch and full batch settings must each
be set separately.
3. Setting programming disable feature. If it be-
comes necessary to prevent anyone from changing
brew time once programmed, you can set the SET/
LOCK switch to the “LOCK” position. This will prevent
any further programming until switch is once again
put into the “SET” position.
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