Agilent 1200 Preparative Pump User Manual 79
Troubleshooting and Diagnostics
6
Error Messages
Leak Sensor Short
The leak sensor in the module has failed (short circuit).
The current through the leak sensor is dependent on temperature. A leak is
detected when solvent cools the leak sensor, causing the leak-sensor current to
change within defined limits. If the current increases above the upper limit,
the error message is generated.
Compensation Sensor Open
The ambient-compensation sensor (NTC) on the main board in the module has
failed (open circuit).
The resistance across the temperature compensation sensor (NTC) on the
main board is dependent on ambient temperature. The change in resistance is
used by the leak circuit to compensate for ambient temperature changes. If the
resistance across the sensor increases above the upper limit, the error
message is generated.
Probable cause Suggested actions
1 Defective leak sensor. Exchange the leak sensor.
2 Leak sensor incorrectly routed, being
pinched by a metal component.
Exchange the leak sensor.
Probable cause Suggested actions
1 Defective main board. Exchange the main board.
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