Needle Down Failed - Agilent Technologies 1220 Infinity II LC User Manual

The processor monitors the current drawn by each motor and the time the
motor is drawing current. The current drawn by the motors is dependent on
the load on each motor (friction, mass of components etc.). If the current
drawn is too high, or the time the motor draws current is too long, the error
message is generated.
Probable cause
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Needle Down Failed

Error ID: 4018
The needle arm failed to move down into the needle seat.
The lower position of the needle arm is monitored by a position sensor on the
sampling unit flex board. The sensor detects the successful completion of the
needle movement to the needle seat position. If the needle fails to reach the
end point, or if the sensor fails to recognize the needle arm movement, the
error message is generated.
1220 Infinity II LC System User Manual
Mechanical obstruction.
High friction in the transport assembly.
Motor belt tension too high.
Defective motor.
Defective transport assembly flex board.
Error Information
Autosampler Error Messages
Suggested actions
Ensure unobstructed movement of the
transport assembly.
Please contact your Agilent service
representative.
Switch OFF the autosampler at the power
switch. Wait at least 10 min before switching
on again.
Please contact your Agilent service
representative.
Please contact your Agilent service
representative.
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