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SERVICE (cont.)
CONTROL BOARD (CONT.)
14. Move the probe’s flat end to the dispenser housing.
The indication must be 0.
15. Move the probe’s flat end away from the housing.
The indication must again be 120 volts ac for two
wire 120 volt models, three wire 120/208 volt
models, three wire 120/240 volt models, or 230
volts ac for two wire 230 volt models after a delay
of approximately 5 seconds.
16. Disconnect the dispenser from the power source.
If the voltage is present as described, re-install the
probe. The liquid level control circuitry is operating
properly.
If the voltage is not present as described, check the pink
probe wire and green tank wire for continuity.
Hopper Motor Control Circuitry (Stations 1-3, Control
Board #1 & Stations 4-5, Control Board #2):
1. Disconnect the dispenser from the power source.
2. Back probe check the voltage across pins 5 & 6 of
the six pin J3connector on the wiring harness with
a voltmeter. Connect the dispenser to the power
source. The indication must be 24 volts ac.
3. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to step 4.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser wiring harness.
4. Check that the rinse/run switch is in the run posi-
tion.
5. Check the voltage across the red (+) terminal and
the black (-) terminal of the auger motor with a volt-
meter. Connect the dispenser to the power source.
Press and hold the appropriate dispense switch.
After a delay of about .6 seconds, the indication
must be between +4.0 and +24.5 volts dc.
If the voltage is present as described, the hopper motor
control circuitry is operating properly.
If the voltage is not present as described, replace the
control circuit board.
Tank Heater Relay Control Circuitry (Control Board #2)
(120V dispensers only):
1. Disconnect the dispenser from the power source.
2. Back probe check the voltage across pins 5 & 6 of
the six pin J3 connector on the wiring harness with
a voltmeter. Connect the dispenser to the power
source. the indication must be 24 volts ac.
3. disconnect the dispenser from the power source.
If voltage is present as described, proceed to step 4.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser wiring harness.
4. Back probe check the voltage across pins 1 & 4 of
the four-pin J4 connector on the wiring harness
with a voltmeter. The indication must be 120 volts
ac.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to step 6.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser wiring harness.
6. Check the voltage across the coil terminals of the
tank heater relay with a voltmeter. Connect the
dispenser to the power source. The indication must
be 0 volts ac.
If voltage is absent as described, proceed to step 7.
If voltage is present, replace the control circuit board
#2.
7. Place containers below any three dispenser noz-
zles.
8. Simultaneously initiate dispenses at each of the
selected dispense stations while monitoring the
voltage across the coil terminals of the tank heater
relay. The indication must be 120V ac.
If voltage is present as described, the control board #2
is functioning correctly.
If voltage is not present as described, replace the control
circuit board #2.
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