TROUBLESHOOTING
“No Flow” LED illuminated or flashing:
The SPS has sensed a no flow condition and has stopped generating chlorine. Check that the flow switch is
plugged into the connector on the bottom of the control unit and that the wire is not cut or damaged. Make
sure you have at least 12” of straight pipe before the flow switch. If there is adequate flow and the LED is still
on, check that the arrows on the flow switch (on top of hex) are pointing in the direction of flow. If the light is
flashing, the flow is established and the SPS will turn on within 1 minute.
“Check Salt” LED illuminated or flashing:
Check salt level in pool/spa. If salt level is low, add salt according to chart on page 4. Before adding large
quantities of salt, it is advisable to have your salt level professionally checked.
“High Salt” LED illuminated:
Check salt level in pool/spa. If salt level is too high, lower salt level by draining some of the pool water out of
the pool and replace with fresh water. Continue until the salt concentration is at recommended levels.
“Inspect Cell” LED flashing:
Inspect and clean cell according to directions. When done, press the “diagnostic” button for 3 seconds to stop
the “Inspect Cell” LED flashing.
“Inspect Cell” LED illuminated:
Remove and inspect the cell for scale. If the cell is scaled, follow the directions on page 8 for cell cleaning. If
the pool has the proper amount of salt and the “Inspect Cell” LED is still illuminated, the cell may be depleted
and needs to be replaced.
Diagnostic Displays
• SPS switch in OFF position.
• Desired Level% adjustment setting is too low.
• Low stabilizer (Cyanuric Acid).Chlorine is being produced but the pool water is unable to hold on to the
chlorine, due to low stabilizer.
• Filter pump switched off or filter pump time too short (8 hours for average size pools, more for large pools).
• Salt level too low (below 2500 ppm, Low Salt LED on).
• Salt level too high (high Salt LED on).
• Low
pH. Low pH oxidizes chlorine quickly, making it difficult to maintain desired chlorine levels. Adjust pH
levels to re-balance water.
• Warm pool water increases chlorine demand—increase Desired Level% or filter run time.
• Cold water (below 50F) can cause SPS to stop generating (Generating LED flashing).
• Excessive scaling on cell.
• High level of phosphates in pool water.
• Some yellow algae treatments will use chlorine at a very high rate and deplete the residual free chlorine.
Manually shock the pool if indicated in the directions on the algae treatment. It still may be a matter of days
before the pool returns to “normal” and chlorine tests will show the desired 1-3ppm free chlorine reading.
“PCB” displayed and all 4 LEDs are illuminated:
A possible printed circuit board fault has been detected. Call for service.
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Summary of Contents for 90151
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