SERVICE (Cont.)
Timer (Model G9)
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| 120 |
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BUNN - |
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P/N | 2620 |
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Single set timer shown |
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Multi set timer (Urn/Carafe) similar |
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FIG 50 TIMER | P1312 | ||
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Location:
The timer is located on the timer bracket in the grinder base. The bracket can be removed by loosening the two
Test Procedure:
1.Disconnect the grinder from the power supply.
2.Check the voltage across terminals TL1 & TL2 with a voltmeter when the “Off/On/Start switch is placed in the “START” (right) position and released. Con- nect grinder to the power supply. The indication must be:
(a)120 volts ac for two wire 120 volt models.
(b)240 volts ac for two wire 240 volt models.
3.Disconnect the grinder from the power supply.
If voltage is present as described, proceed to step 4.
6.Check the voltage across terminals TL1 and TL4 with a voltmeter when the Off/On/Start switch is placed in the “START” (right) position and released. Connect grinder to the power supply. The indication must be:
(a)120 volts ac for two wire 120 volt models.
(b)240 volts ac for two wire 240 volt models.
7.Disconnect the grinder from the power supply.
If voltage is present as described, the timer is operating properly. Refer to the Adjustments section to vary the amount dispensed.
If voltage is not present as described, replace the timer.
Removal and Replacement:
1.Remove all wires from the timer terminals.
2.Remove the four
3.Remove the two
4.Install the new dial plate and circuit board to the timer bracket.
5.Refer to the illustration below when reconnecting the wires.
6.Refer to the Adjustments section to vary the amount dispensed.
WHI/RED to Relay N.O.
WHI/RED to
Off/On/Start Switch
If voltage is not present as described, refer to the Wiring Diagram and check the grinder wiring harness.
4.Remove the white/orange and white/yellow wires from terminals TL3 & TL5.
5.Check for continuity across the white/orange and white/yellow wires when the Off/On/Start switch is placed in the “START” (right) position.
2 | 3 |
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| 4 |
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| 5 |
P/NBUNNMINUTESO- |
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| 2620- MATIC |
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| 120 | VAC | |
WHI to Cordset (120 v) RED/BLK to Cordset (240 v)
WHI/ORA to
Off/On/Start Switch
WHI/GRN to Relay Coil
WHI/YEL to
Off/On/Start Switch
If continuity is present as described, reconnect the white/orange wire to terminal TL3 and the white/yellow wire to terminal TL5, and proceed to step 6.
If continuity is not present as described, refer to the Wir- ing Diagram and check the grinder wiring harness.
Single set timer shown
Multi set timer (Urn/Carafe) connections are the same
P1313
FIG 51 TIMER TERMINALS
48 | 41545 122209 |
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