Bunn DUAL068000 - Manual (Page 34)

Page 34
PROGRAMMING THE BREWER (cont.)
SERVICE TOOLS (cont.)
NOTE: To bypass testing any component, press NEXT
to advance to the next one, without testing the previ-
ous component.
10. To test LEFT BYPASS, press ON. If the bypass
valve is functional, water should run from the left
brew bypass.
11. Press OFF to end flow of water.
12. Press NEXT to advance to the next component to
be tested.
13. To test LEFT FUNNEL LOCK, press ON. If the fun-
nel lock is functional, the lock will come down to
hold the funnel in place.
14. Press OFF to retract the funnel lock.
15. Press NEXT to advance to the next component to
be tested.
16. Follow steps 7 through 15 to test the right side
components.
17. To test REFILL VALVE, press ON. If the refill valve
is functional, the sound of the valve operating will
be heard.
18. Press OFF to end testing of refill valve.
19. Press NEXT to advance to the next component to
be tested.
20. To test TANK HEATERS, connect a voltmeter across
each of the tank heaters to check for voltage.
21. Press ON. The correct voltage should be present
at the heater terminals.
22. Press OFF to end testing of the tank heaters.
NOTE: The tank heater will automatically turn off if
left on too long.
23. After testing the tank heater, press NEXT to advance
to the next test.
24. The HEATER CONTACTOR is used only on certain
models. Check the machine schematic to see if the
contactor is present. Connect a voltmeter across a
tank heater that is operated by the contactor and
press ON to check that correct voltage is present.
Press OFF and confirm the voltage is zero.
25. Press NEXT to return to TEST OUTPUTS.
26. o exit SERVICE TOOLS, press and release the ON/
OFF switch (either on DUAL brewers) located on
the front switch panel. This will return to the MAIN
SCREEN.
Procedure to test switches:
This function allows the operator to test the opera-
tion of the individual switches on the front panel.
1. Place brew funnel(s) into rails on the brewer (both
sides on DUAL brewers).
2. Place a server beneath each brew funnel.
3. Press and hold the upper right hidden switch until
display reads UNITS. Release the switch. Continue
to press and release switch until SERVICE TOOLS
appears.
4. Press YES to run tests on various components
and outputs within the brewer. (Pressing NO will
exit this function and advance to the next function
screen.)
5. The display should read TEST OUTPUTS.
6. In TEST OUTPUTS screen, press NO. This advances
to TEST SWITCHES.
7. Pressing NO in this screen will advance to the
next function. Press YES in the TEST SWITCHES
screen to test the switches. The display will read
NOTHING PRESSED.
8. From this screen, press any of the switches on the
front of the brewer except the upper right hidden
switch. While the switch is pressed, the display
shows the name of that switch. If the name does
not appear, or if it remains after the switch has been
released, the switch is defective. Each switch can
be tested in this manner.
9. After all switches have been tested, press and re-
lease the right hidden switch (®). This will return
to TEST SWITCHES?. Press and release switch
again to advance to TEST SERVERS?. Another
alternative is to press and release the ON/OFF
switch (either on DUAL brewers) located on the
front switch panel. This will exit TEST SWITCHES
and return to the MAIN SCREEN.
Procedures to test coil frequency:
1. Place brew funnel(s) into funnel rails of the brewer
(both side on DUAL brewers).
2. Place a ThermoFresh server beneath brew
funnel(s).
3. Press and hold the upper right hidden switch
until the display reads UNITS. Release the switch.
Continue pressing and releasing the upper right
hidden switch until SERVICE TOOLS appears.
4. Pressing NO will exit this function and advance to
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