Troubleshooting - Pentair STA-RITE SC-75P Installation Manual

Use the following troubleshooting information to resolve possible problems with the SC-75 Salt Chlorinator.
Note: Switch power off to unit before to attempting service or repair. Always remove AC power to Power Center when plugging
or unplugging the SC-75 cell into the Power Center.
Problem Possible Cause
Low or no chlorine Low Stabilizer (cyanuric acid) level in pool wa-
ter (outdoor pools only).
Insufficient operating hours of the SC-75.
Sanitizer output percentage too low or at 0%.
Recent increases in weather temperature with-
out increasing the SC-75 sanitizer Output.
Temporary loss of chlorine due to heavy organ-
ic load, rain, leaves, fertilizer or heavy bather
load, recent party, or pets using pool.
Low (less than 2600 ppm) salt level in pool
water, shuts off chlorine production.
High nitrate and phosphate level.
Metals present in pool water.
New pool water, or not shocked properly upon
startup.
Clogged or dirty cell.
Red SALT LED is on. Pool water needs salt. No chlorine is being
produced.
Yellow SALT LED on Salt level in pool water is low and may need
and green CELL LED inspecting.
flashing
Green SALT LED is Too much salt in pool. May cause damage to
flashing pool equipment and surrounding surfaces.
CELL LED is red. Water is below 12°C.
CELL LED does not Chlorine Production set to 00%.
come on.
Insufficient water flow. Cell is plugged with
debris, pump has lost prime.
Salt level below 2600 ppm.
CELL LED is flashing Check salt level.
green.
Cell has calcium build-up and requires clean-
ing.
Check water chemistry and balance. NOTE
metal content should be 0 ppm.
Limited Warranty : 2 years
More info : www.pentairpooleurope.com
19

Troubleshooting

Corrective Action
Add cyanuric acid in outdoor pools only to
maintain 30 - 50 PPM per pool professional's
recommendations. See Stabilizer Chart.
Increase the SC-75 operating time per day.
Increase sanitzer output by pressing the MORE
button.
Increase sanitzer output by pressing the MORE
button.
Set "Boost" mode and allow to run for 24
hours. Re-check, If still too low, super- chlorin-
ate by using an outside source. (Take pool water
sample to pool professional).
Observe Salt Display lights. See "Salt Level
Status LEDs"
Contact Pool Professional.
Contact Pool Professional.
Super Chlorinate Pool.
See "Start-up Procedure (Super Chlorination)"
Remove cell for inspection. Clean if necessary.
Add salt to achieve 3400ppm.
Check salt level, add if necessary to GOOD level.
Allow 24 hours for salt to mix in water. If CELL
light is still flashing after 24 hours, remove and
inspect cell and clean if necessary.
Dilute pool water by draining some water, then
filling with fresh water
The water temperature must be above 12°C to
produce chlorine.
Adjust CHLORINE PRODUCTION to desired
percentage.
Remove obstruction and/or clean cell.. Prime
pump if necessary.
Add salt.
Add salt if necessary to maintain 3400 ppm
minimum.
Refer to Maintenance Procedure for acid wash/
cleaning. See "User Maintenance"
Remove metals from water using chemical solu-
tion.
Section 6