Rola-Chem 554200 pH Digital Controller - Manual (Page 10)

Low feed rates can cause the feeder to lag or feeding to be extended. A high feed rate
can result in too much pH chemical being added.
To verify the feed type (acid or base) adjust pH “set” level above the pH indicated on
display. The feed lamp should come on if the controller is in acid feed mode. If the
controller is in base feed, the feed lamp will come on if the pH indicated is below the pH
“set” level.
4.5 Reset
The controller can be reset to the default factory settings by using the steps below:
A. Press ‘Mode’ button to turn ‘Auto’ light off.
B. Hold ‘Mode’ button until ‘OFF’ is displayed.
Release ‘Mode’ button. Display should be blank.
C. Hold the ‘Set Level’ and ‘pH Calib’ buttons and then the press Mode button (all
three buttons held at same time).
D. The display will read ‘LD’ and then a number.
E. Release the buttons.
F. Turn the controller ‘off’ and then ‘on’.
Note: This last step is extremely important since this puts the controller back
in the operating mode. If step F is not performed, the controller is in the test
mode and it will not operate correctly.
5.0 Troubleshooting-
5.1 Chemicals not feeding
* FLOW light on Controller must be illuminated.
Check flow switch (manifold) if light is not on (Section 3.3.3)
* Feeder power and time switches must be in ‘ON’ position.
Check feeder by using alternate power source.
* Factory setting for feed time is 0.6 sec on with 5 minute delay.
Feeders may require longer feed time.
5.2 Displayed chemical level don’t correspond to actual
* Sensor (probe) is not attached connector.
* Sensor (probe) needs cleaning.
* Sensor (probe) needs replacing.
Rola-Chem Digital Controller PN 554212 6/01/2012 Page: 10 of 12