There are significant operational differences between the group of revisions A,B,C and the group of revisions D,E for the Natural Water Purifier circuit boards.

These boards are used in Models 2001, 2051, 2500, 2550 Natural Water Purifiers. They are also used in 2-Speed Pool Management Systems Model 5001.

Purifier Board Layout

How to identify the revisions:

The best way to tell the difference is to remove the connection to the electrodes.

1. Then turn purifier power on and vary the output adjustment knob.
2. For revisions A, B & C the output lights will increase and decrease when the output is adjusted.
3. For revisions D,E the output lights will not illuminate.

Revisions A,B, & C:
The output lights are an indicator of the adjustment setting. When the jumper is on the left two pins of the “Limit” plug the Purifier max output is set to 500 milliamps. When the jumper is on the right two pins of the “limit” plug the Purifier max output is set to 250 milliamps. The “Check Electrode” front panel light may not illuminate when the electrodes are not connected to the electrode plug or the electrode circuit is open.

Revisions D & E:
The output lights are an indicator of the actual Purifier electrical current being conducted through the electrodes. When the jumper is on the left two pins or no jumper is installed on the “Limit” plug the Purifier max output is set to 500 milliamps. When the jumper is on the right two pins of the “Limit” plug the Purifier max output is set for 750 milliamps. (Other board components must also be different to achieve 750 milliamps.) The “Check Electrode” front panel light will illuminate when the electrodes are not connected to the electrode plug or the electrode circuit is open.