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SERVICE (cont.)
Electronic Controls (cont.)
If the indicator was on or blinking, the temperature sen-
sor is operating properly, proceed to #7.
If the indicator was off, check the sensor connection
on the electronic control circuit board and/or replace
the temperature sensor and the electronic control as-
sembly.
NOTE - Each temperature sensor is calibrated to an
electronic control assembly. Both components MUST
be replaced as a set.
7. Check the voltage across the tank heater terminals
with a voltmeter. Connect the dispenser to the
power source. The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt models
or
b.) 200 to 240 volts ac for 200 to 240 volt models
while the red indicator on the circuit board is on or
blinking.
8. Disconnect the dispenser from the power source.
If voltage was present as described, the temperature
control of the system is operating properly.
If voltage was not present as described, contact Bunn-
O-Matic to order an electronic control assembly, tem-
perature sensor, and triac assembly for evaluation and
proceed to #9.
9. Replace the electronic control assembly and tem-
perature sensor.
NOTE - Each electronic control assembly is calibrated
to a temperature sensor. Both components MUST be
replaced as a set.
10. Check the voltage across the tank heater terminals
with a voltmeter. Connect the dispenser to the
power source. The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt models
or
b.) 200 to 240 volts ac for 200 to 240 volt models
while the red indicator on the circuit board is on or
blinking.
11. Disconnect the dispenser from the power source.
If voltage was present as described, return the new
triac assembly to Bunn-O-Matic for credit. The tem-
perature control of the system is operating properly.
If voltage was not present as described, reinstall your
existing electronic control assembly and temperature
sensor, and proceed to #12.
12. Replace the triac assembly.
13. Check the voltage across the tank heater terminals
with a voltmeter. Connect the dispenser to the
power source. The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt models
or
b.) 200 to 240 volts ac for 200 to 240 volt models
while the red indicator on the circuit board is on or
blinking.
14. Disconnect the dispenser from the power source.
If voltage was present as described, the temperature
control of the system is operating properly. Return the
new electronic control assembly and temperature sen-
sor to Bunn-O-Matic for credit.
10420 011599