Service manual

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Probe Test
Run this test only on a circuit board that has passed the Circuit Board Test, above.
1) Remove the probe from the resin tank.
2) Visual inspection
a) Look for discoloration (brown film or blue spots) on electrode fins.
b) If discolored, try cleaning the probe (Sofner-Gard chemical or white vinegar). The fins can be lightly
scrubbed with a soft toothbrush.
3) Continuity test
a) Prepare a dilute brine solution in a non-conductive (glass or plastic) container. Two heaping table
spoons of granular salt or ½ cup of liquid brine per gallon of water will make a suitable solution. Mix
thoroughly.
b) Dip the probe into the container, immersing both cell pairs. Do not allow the probe to touch the side of
the container.
c) Remove the power to the control and connect the probe to the circuit board.
d) Make sure the DIP switch setting is still in test mode.
e) Restore power to the control.
f) If the drive motor runs, replace the probe.
g) Pull the probe part way out of the dilute brine solution so that only the bottom cell pair is in the solution.
h) If the motor does not run, replace the probe.
Resin and Regeneration
If the circuit board and the probe pass all tests, the condition of the resin or the regeneration process may actually be to blame.
1) While the probe is out of the tank, take a sample of resin and examine it for breakage (fines) and fouling.
2) Remove the power to the control.
3) Return the probe to the tank and reconnect it to the circuit board.
4) Power up the control and verify that the program matches the settings recorded at the beginning of the pro-
cedure. Also, make sure that the settings are correct for the application.
a) For 9” tanks, the recommended salt setting is 6 – 8 pounds for optimum Aqua-Sensor performance
b) For 12” tanks, the recommended salt dosage is 10 – 13 pounds.
c) On Gen 3 circuit boards it is recommended that the brine rinse time be left at the default setting of 71
minutes (increase for higher salt dosages or low inlet pressure conditions) to assure adequate rinse
time. The Automatic Rinse Time feature will shorten the actual rinse time as it detects the passage of
the salt from the tank. Setting the time at too short a value could prevent complete rinse-out and cause
daily regeneration.
5) Backwash the unit for 2 – 3 minutes after installing the probe to eliminate any air pockets in the unit.
6) Check the unit for regeneration function (salt dosage, brine draw, rinse and refill)
CULLIGAN HOUSEHOLD & COMMERCIAL CIRCUIT BOARDS
30
Figure 1:
Generation 1
Circuit Board
Figure 2:
Generation 3
Circuit Board