Bunn C - Manual (Page 25)

Page 25
SERVICE (cont.)
FRESHNESS TIMER (Early Models)
Location:
The freshness timer is located inside the front of
the trunk on the component bracket.
Operation:
The freshness timer activates an LED on the
control panel after a predetermined amount of time
(after the brew cycle) to indicate carafe on warmer
too long.
Settings: Default settings underlined
JP1: Choose between flashing LED or steady.
JP2: Choose whether the LED stays ON, then
turns off; or is off, then turns on at the end of delay.
R4: Delay time adjustment, 20-60 minutes.
Test Procedure.
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across T1 & T2
(black & white wires) of the fresh timer. Connect
the brewer to the power source. The indication
must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac on two wire 200 volt or 240
volt models.
3. Disconnect the brewer from the power source.
FIG. 25-1 TIMER TERMINALS
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wiring Diagrams and check the brewer wiring har-
ness.
4. Check the voltage across the T3 and T4 (white/
orange and white/blue wires) of the fresh timer
with a voltmeter when the "ON/OFF" switch is in
the "ON" position (upper) and start switch pressed.
Connect the brewer to the power source. The
indication must be: (when solenoid is activated)
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 to 240 volts ac for two wire 200 volt or 240
volt models.
5. Disconnect the brewer from the power source.
6. Reconnect the three pin connector from main
wiring harness to the timer.
If voltage is present as described, proceed to #7
If voltage is not present as described, refer to Wiring
Diagrams and check the start switch and brewer wir-
ing harness.
7. With a voltmeter, check the voltage across connec-
tor P1 after the delay period (JP1 set to "STEADY",
and JP2 set to "ON"). The indication must be:
3-5 volts dc (when solenoid is activated).
If voltage is present as described, the fresh timer
is operating properly. If voltage is not present as
described, replace the timer. NOTE: The freshness
timer is no longer available.
Removal and Replacement:
1. Disconnect the brewer from the power source.
2. Disconnect all four connectors from the timer.
2. Remove the two #8-32 screws securing timer to
component bracket.
6. Adjust the timer as required. Refer to Late Model
Timer section on the following pages.
41711.1 052009