Walchem WebMaster ONE Instruction Manual page 174

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
Poor connection of the option board to
the core board.
Faulty Ethernet board.
Temperature High Alarm
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
The actual temperature is too high.
The programmed value is set too close to
the normal operating temperature.
The temperature sensor has lost calibration.
Faulty circuit board.
Faulty temperature sensor.
Corrective Actions
Remove the option board and inspect both
mating connectors for corrosion or damage.
Reinstall the option board.
Replace the board.
Corrective Actions
Correct problem with process.
Go to the sensor input page and increase the
high alarm limit.
Go to the Temperature Input Page and calibrate
the temperature.
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.
If a successful calibration is not possible,
the temperature sensor is probably faulty, and
the sensor should be replaced.
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