1. pH High / Cl/Br Lockout
   • When the pH exceeds the preset high limit, controller will stop the feed of chlorine/bromine until pH comes back under control.
   • Most likely cause is no acid/CO2 left to feed. Check for leaks in tubing or at Stenner pump.
   • If alarm happens during heavy use periods, you may also want to turn feed rate dial on Stenner pump up.
   • To correct, reset controller by pressing up and down arrow keys at same time or unplug.
     • Rectify supply.
   
   
   
2. pH Low / Cl/Br Lockout
   • When the pH exceeds the preset low limit, controller will stop the feed of chlorine/bromine until pH comes back under control.
   • This may alert you to other problems. Remedy the pH problem by adding soda ash to increase pH. Check the alkalinity. If alkalinity is also low, add sodium bicarbonate. Investigate source of low pH and low alkalinity.
   
   
   
3. HRR High
   • When HRR exceeds preset high limit, controller will continue to control pH feed.
   • Determine why sanitizer overfed and rectify.
   • Will come out of alarm when HRR drops to acceptable level.
   
   
   
4. HRR Low
   • When HRR exceed preset low limit, controller will continue to control pH feed.
   • Most likely cause is no chlorine left to feed and you will also get a failsafe alarm. Check for leaks in tubing or at Stenner pump.
   • To correct, reset controller by pressing up and down arrow keys at same time or unplug.
     • Rectify supply.
   
   
   
5. Failsafe
   • When controller has feed pH or HRR solutions for 4 hours and has not been able to return to set point, controller will stop all chemical feeds.
   • Most likely cause is no chlorine or acid left to feed. Check for leaks in tubing or at Stenner pump.
   • May also be an indication of heavy use, and may be rectified by turning feed rate dial up on Stenner pump.
   • To correct, reset controller by pressing up and down arrow keys at same time or unplug.
     • Rectify supply.
   
   
   
6. No Flow
   • Flow sensor detects lack of circulation and turns off chemical feeds.
   • To correct, check for power. If power is present at motor, most likely broken impeller. Also check filter for pressure. If high, backwash filter.
   • When flow is returned, controller will come out of alarm. Check back in 4 ½ hours for failsafe alarm if HRR/pH values are far from set point upon restart.

1. HRR remains constant but free chlorine residual climbs.
   • Most common cause is a dirty probe. Need to clean organic and mineral debris off sensor. 1) Turn off chemical feed pumps. 2) Turn off flow to sample stream and carefully remove probes. 3) Clean with Fantastic/409 and a toothbrush. 4) Lightly brush white ring on HRR probe and white ring and glass ball on pH probe. Rinse with water. 5) Agitate in a light solution (10 to 1) of acid. Rinse and plug back in. 6) After approximately 30 - 45 minutes, do a water test and re-calibrate controller. 7) Turn chemical feed pumps back on.
   
   
   
2. Controller reads good but water is cloudy.
   • Most common cause is poor circulation or dirty filter. Check filter gauges. If elevated, backwash filters.
   • Can also be a sign of high combined chlorine (chloramines)
     • Must super-chlorinate to remove
   • May also be an indication of high Total Dissolved Solids (TDS). If high (1000+), dilute, dilute, dilute.
   
   
   
3. Controller has no power.
   • Check power source including circuit breaker.
   • Check fuse in controller.

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