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Sensor Board Failure
This error message is caused by a failure of the controller to recognize that the option circuit board
is connected. The ORP output relay will be forced off.
Possible
Causes
Corrective
Actions
Poor connection of the option board to
Remove the option board and inspect both
the sensor interface board.
mating connectors for corrosion or damage.
Reinstall the option board.
Faulty sensor input board.
Replace the sensor input board.
4-20 mA Input Board Failure
This error message is caused by a failure of the controller to recognize that the option circuit board
is connected. If using a 4-20 mA type water meter, then bleed/feed output will be forced off.
Possible
Causes
Corrective
Actions
Poor connection of the option board to
Remove the option board and inspect both
the relay interface board.
mating connectors for corrosion or damage.
Reinstall the option board.
Faulty 4-20 mA input board.
Replace the board.
Digital Input Board Failure
This error message is caused by a failure of the controller to recognize that the option circuit board
is connected. If utilizing the Interlock feature, then any outputs that are set to deactivate in case of
an Interlock condition will be forced off.
Possible
Causes
Corrective
Actions
Poor connection of the option board to
Remove the option board and inspect both the
relay interface board.
mating connectors for corrosion or damage.
Reinstall the option board.
Faulty digital input board.
Replace the board.
Modem Failure
This error message is caused by a failure of the controller to recognize that the option circuit board
is connected.
Possible
Causes
Corrective
Actions
Poor connection of the option board to
Remove the option board and inspect both
the core board.
mating connectors for corrosion or damage.
Reinstall the option board.
Faulty modem board.
Replace the board.