Instruction manual

120
Ethernet Card 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 Ethernet board. Replace the board.
Temperature High Alarm (system or makeup)
This error message is caused by the temperature signal from the conductivity sensor exceeding the
user-programmed value for the high alarm limit.
Possible Causes Corrective Actions
The actual water temperature is too high. Correct problem with cooling tower.
The programmed value is set too close to Go to the Temperature Input Page and.
the normal operating temperature. Increase the high alarm limit.
The temperature sensor has lost calibration. Go to the Temperature Input Page and calibrate
the temperature.
Faulty circuit board. Go to the Temperature Input Page and perform
a self test. If the self test fails, then the sensor
input board (if makeup) or the core interface
board (if system) should be replaced.
Faulty temperature sensor. If a successful calibration is not possible,
the temperature sensor is probably faulty, and
the sensor should be replaced.
Temperature Low Alarm (system or makeup)
This error message is caused by the temperature signal from the conductivity sensor being below
the user-programmed value for the low alarm limit.
Possible Causes Corrective Actions
The actual water temperature is too low. Correct problem with cooling tower.
The programmed value is set too close to Go to the Temperature Input Page and.
the normal operating temperature. decrease the low alarm limit.
The temperature sensor has lost calibration. Go to the Temperature Input Page and calibrate
the temperature.