SERVICE (cont.)

DIGITAL TIMER (Late Models)

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.

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

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Bunn U3A service manual Digital Timer Terminals

U3A, U3 specifications

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