Agilent Technologies Quaternary Pump 1100 Series - Manual (Page 53)

53
Troubleshooting and Test Functions
Leak Sensor Open
Leak Sensor Open
The leak sensor in the quaternary pump has failed (open 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 falls outside the lower limit, the
error message is generated.
Probable Causes • Leak sensor not connected to the LPM board.
• Defective leak sensor.
• Leak sensor incorrectly routed, being pinched by a metal component.
Suggested Actions ❏ Ensure the leak sensor is connected correctly.
❏ Exchange the leak sensor.