15
SERVICE (cont.)
Liquid Level Board
Location:
The liquid level board is located inside the lower
panel.
Test Procedure:
1. Disconnect the dispenser from the power
source.
2. Remove the blue wire from terminal 1 and the pink
wire from terminal 4 of the circuit board.
3. Check the voltage across terminals 2 and 3 with
a voltmeter. Connect the dispenser to the power
source. Turn the thermostat knob to the “ON” posi-
tion (fully clockwise). The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt mod-
els,
b.) 200 to 240 volts ac for 200 to 240 volt mod-
els,
c.) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the wiring
diagrams and check the wiring harness.
FIG. 11 LIQUID LEVEL BOARD
P1783
5. Reconnect the blue wire to terminal 1.
6. Carefully connect a piece of insulated jumper wire
to terminal 4. Keep the other end of this wire away
from any metal surface of the dispenser.
7. Check the voltage across terminals 1 & 3 with a
voltmeter. Connect the dispenser to the power
source. Turn the thermostat knob to the “ON” posi-
tion (fully clockwise). The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt mod-
els,
b.) 200 to 240 volts ac for 200 to 240 volt mod-
els,
c.) 230 volts ac for 230 volt models,
after a delay of approximately 5 seconds.
8. Touch the free end of jumper wire to the dispenser
housing. The indication must be 0.
9. Move the jumper wire away from the dispenser
housing. The indication must again be:
a.) 100 to 120 volts ac for 100 to 120 volt mod-
els,
b.) 200 to 240 volts ac for 200 to 240 volt mod-
els,
c.) 230 volts ac for 230 volt models,
after a delay of approximately 5 seconds.
10. Disconnect the dispenser from the power source
and remove the jumper wire from terminal 4.
If voltage is present as described, the level control board
is operating properly, proceed to #11.
If voltage is not present as described, replace the level
control board.
11. Reconnect the pink wire to terminal 4.
12. Gently pull the probe out of the tank and inspect
for corrosion. Replace it if necessary.
13. Place the probe so that neither end is in contact
with any metal surface of the dispenser.
14. Check the voltage across terminals 1 & 3 with a
voltmeter. Connect the dispenser to the power
source. Turn the thermostat knob to the “ON” posi-
tion (fully clockwise). The indication must be:
a.) 100 to 120 volts ac for 100 to 120 volt mod-
els,
b.) 200 to 240 volts ac for 200 to 240 volt mod-
els,
c.) 230 volts ac for 230 volt models,
after a delay of approximately 5 seconds.
10267 071900
