Bunn WDG-2 manual Disconnect grinder from the power source

SERVICE (cont.)

Timer - DG-2 (cont.)

Test Procedure:

1.Disconnect grinder from the power source.

2.Slide timer with wires connected from housing.

3.Place the hopper selector switch in the left posi- tion.

4.Disconnect eight pin plug J4 from timer board.

5.Check the voltage between J4-1 and J4-2 with a voltmeter. Connect the grinder to the power source. The indication must be 120 volts AC.

6.Disconnect grinder from the power source.

If voltage is present as described, proceed to #7.

If voltage is not present as described, refer to the wiring diagram and check grinder wiring harness.

7.Check the voltage between J4-2 and J4-6 with a voltmeter when the "OFF/ON/START" switch is in the "ON" position.Connect the grinder to the power source. The indication must be 120 volts AC.

8.Disconnect grinder from the power source.

If voltage is present as described, proceed to #9.

If voltage is not present as described, refer to the wiring diagram and check the grinder wiring harness.

9.Grinders prior to S/N DG00002660:

Check the voltage between J4-3 (+) and J4-5 (- ) with a voltmeter set to read DC voltage when the "OFF/ON/START" switch is in the "START" po- sition. The indication must be 110 volts DC mini- mum.

Grinders S/N DG00002660 - UP

Check the voltage between J4-3 and J4-5 with a voltmeter when the "OFF/ON/START" is in the "START" position. The indication must be 120 volts AC.

10. Disconnect grinder from the power source.

If voltage is present as described, proceed to #11. If voltage is not present as described, replace timer and motor circuit board with part number 25725.1000.On grinders prior to S/N DG00002660 also order main wiring harness 25762.0001.

11.Reconnect the wires.

12.Place the hopper selector in the right position.

13.Repeat steps #4 thru 10.

Grinders with One or Two Brewer Optional Interface

1.Set the brewer selector switch on one third batch with grinder "OFF/ON/START" switch in the "ON" position.

2.Select the two third's batch, if the readout is not different then adjust the settings and return se- lector switch to one third batch. The readout should now be different.

3.Select full batch, if the readout is not different then adjust the settings and return selector switch to two third's batch. The readout should be dif- ferent.

4.Repeat steps 1 thru 3 for the opposite side.

NOTE: Each brew selection has its own readout. If readouts do not differ with each brew selection after adjusting settings, check interface cable. If interface cable is ok replace timer and motor circuit board with part number 25725.1000. On grinders prior to S/N DG00002660 also order main wiring harness part number 25762.0001.

Removal and Replacement:

1.Separate the grinder wiring harness connectors from the timer circuit board.

2.Refer to the illustration on next page when reat- taching the connectors.

3.Refer to the Adjustments (page 7) section to re- set the volume dispensed.

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