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7.0 TROUBLESHOOTING
CAUTION
: Disconnect power to the controller before opening front panel!
Troubleshooting and repair of a malfunctioning controller should only be attempted by qualified
personnel using caution to ensure safety and limit unnecessary further damage. Contact the factory.
7.1 Error
Messages
HIGH ALARM - (main summary screen only)
The summary screen will display an H at the right end of the bar graph if the conductivity rises above the high conductivity alarm set point. The
controller will continue to check the conductivity, and the blowdown and/or feed outputs will be allowed to be activated.error condition will stop
both conductivity and pH control. It indicates that the temperature signal from the conductivity electrode is no longer valid. This prevent
controlling based upon a false pH or conductivity reading.
Possible Cause
Correction Action
Dirty electrode
Clean electrode (see Sect. 6.1)
Faulty solenoid valve
Repair or replace solenoid valve.
Faulty electrode
Evaluate (see Sect. 7.3). Check Temp display.
Improper wiring of valve or controller
Correct wiring. (see Section 3.4)
Faulty blowdown relay
Replace relay. (Consult factory.)
LOW ALARM
The summary screen will display an L at the left end of the bar graph. The controller will continue to check the conductivity and feed inhibitor as
programmed.
Possible Cause
Correction Action
Sensor disconnected
Reconnect. Check cable for continuity.
Sensor dry
Check tee for obstruction. Verify flow. Change location of electrode.
Solenoid valve stuck open
Repair or replace solenoid valve. (Consult your distributor).
Faulty electrode
Evaluate (see Section 7.3). Replace if necessary.
Improper wiring of electrode
Correct wiring. (see Section 3.4)
Faulty blowdown relay
Replace relay. (Consult factory.)
TEMP ERROR
This error condition will stop both conductivity and pH control. It indicates that the temperature signal from the conductivity electrode is no longer
valid. This prevent controlling based upon a false pH or conductivity reading.
Possible Cause
Correction Action
Green or white electrode wire disconnected.
Reconnect.
Faulty electrode.
Replace electrode. Revert to manual temperature compensation by
cycling power off and on.
SENSOR ERROR
This error condition will stop conductivity control. It indicates that the conductivity signal from the electrode is no longer valid. This prevents
controlling based upon a false conductivity reading.
Possible Cause
Correction Action
Back or red electrode wire shorted.
Disconnect short.
Faulty electrode.
Replace electrode.
Faulty controller.
Verify via failed self test.
