48
Culligan® High Efficiency 1.5 Twin Water Softener
48
Cat. No. 01024821
Aqua-Sensor
®
Troubleshooting
The following procedure will help you diagnose problems in units equipped with Aqua-Sensor
®
sensing device. Because
many sensor problems are actually regeneration problems, it contains a combination of sensor diagnostics and routine
control valve and brine system checks. Refer to the GBE Programming for Commercial Softeners and Filters, except for
HF xN Manual (P/N 01027295) . This manual can be obtained from your local dealer, CPort (www.cport.culligan.com)
under the
or on the iPad Service Tech App.
Recording Important Information
Record the following information from the GBE diagnostic menu screens to use in analyzing the Aqua-Sensor’s perfor-
mance.
Select: Main Menu > Diagnostics > Advanced Stats > Regen Stats
Last Regen Trigger: _____________
If it shows Aqua-Sensor, the probe and circuits are working correctly to detect resin exhaust. If you see Manual, Flow
Meter, Manual, etc., the Aqua-Sensor may not be reading correctly or programming could be favoring another trigger to
regenerate. Gallons or Reserve could be higher than needed for the probe to signal exhaustion. Be sure your reserve is
less than 5% in the Regen Setup.
Last Brine Draw Slow Rinse: ____________
If it shows a number of minutes less than the programmed Slow Rinse Time, found in Advanced Setup > Cycle Times >
Slow Rinse, then the patented rinse-out feature of the Aqua-Sensor is operating based on the probe sensing th eremoval
of brine and hardness during regeneration. If the number is the same as the Slow Rinse Time, the setting could be too
short for the salt dosage and eduction rate or the probe may not be sensing the rinse-out. Lengthening the cycle time
greater than 75 minutes can often insure it isn’t the first possibility. In general, the time you read should be 8-15 minutes
less than the cycle time.
Select: Main Menu > Diagnostics > Check Sensors
AquaSensor Supply Voltage 2.5VAC: ______________
This should always read PASS. If you see FAIL, check the voltage at the wall transformer for 2.5VAC. If the transformer
checks out it might be the power cord, the pin connector at the board or damage to the circuit board.
Pass SIM Test: Ignore this unless you have the Simulator Box (P/N 01017705 plugged into the board instead of the
Aqua-Sensor Probe at the time of the reading. Reading PASS is only necessary when using the Sim Box.
With water flowing through the tank record Z-ratio: ______________
This is a reading from the sensing probe while you have water flowing passed it. Unless the tank has just finished a full
regeneration, this reading should be increasing slightly or at least be a number higher than the Z-minimum recording. The
exact number is not important as you might see something near 1078 or higher. What is critical is the number is increas-
ing, since it determines the need to regenerate.
Z-minimum: ________________
If this number remains at 0000 the tank has not yet regenerated successfully sending brine thru the resin bed or there is
no 2.5VAC power to operate the probe; preventing it form recording a number; or the probe is not installed correctly inside
the tank and into the circuit board; which would also affect the Z-ratio reading. Z-minimum should always be a number
lower than Z-ratio, since it is the starting point for monitoring conductivity in the resin. Also it might change slightly after
each successful regeneration.
Z-increase %: ________________
This number represents a difference, an increase in Z-ratio over the Z-minimum. As this percentage reaches 7.5% for
longer than 6 minutes, the circuit board will get ready to regenerate. The percentage can be seen higher than 7.5%, but it
has no bearing on the need to regenerate.
By understanding each of these indicators in the programming, technicians should be able to see if the Aqua-Sensor is
functioning properly. Remember that it is only a trigger to regenerate based on reading the hardness level in the resin
bed. If the softener does not fully operate mechanically through a proper regeneration, the sensor cannot perform its
functions correctly either.
If the power supply, programmed settings and regeneration are all correct, and the unit fails to trigger a regeneration from
the sensor, replace the Aqua-Sensor probe.
If all of these factors are correct and the unit seems to be continually regenerating, consider the quality of the resin and a
proper regeneration before deciding to replace the Aqua-Sensor probe.
