Rola-Chem 554000 ORP/pH Digital Controller User Manual
Page 14
B. Displayed chemical level don’t correspond to actual
* ORP=0, pH=6.8 indicates sensors (probe) are attached to incorrect connector
* Sensors (probe) need cleaning.
* Sensors (probe) need replacing.
Note: OPR probe reading can be affected by pH probe.
Both probes must be in good operating condition.
C. Set-points not being reached/maintained
*
Factory setting for feed time is 0.6 sec on with 5 minute delay. Feeders may require longer feed
time. If time is too short, set-points will not be maintained. If time is too long, overfeeding
chemicals will occur. Correct time is dependent of multiple factors such as pool/spa water
volume, feeder output, chemical concentration and chemical needs.
* Controllers are designed to maintain set-points. Do not expect Controllers to make major
adjustments—major changes should be done manually.
* Pump/feeders must be large enough to reach desired set-points in a relatively short time.
Automation using controllers may require larger feeder or more concentrated chemicals than
system that uses continuous time controlled feeding (i.e. feeders only).
Rola-Chem Digital Controller PN 554102 6/01/2012 Page: 14 of 20