92
Troubleshooting and Test Functions
Step Commands
Draw
Sum of all draw volumes exceeds 100µl.
Defective metering-drive motor.
Needle Up
Needle already in the upper position.
Needle already in the upper position.
Defective or dirty sensor on the sampling-unit flex board.
Sticking needle-arm assembly.
Defective needle-drive motor.
Vial to Tray
Defective transport assembly motors.
Sticking transport assembly.
Defective gripper assembly.
Gripper not aligned (see page 87 ).
Needle Down
Needle already in the lower position.
Defective or dirty sensor on the sampling-unit flex board.
Sticking needle-arm assembly.
Defective needle-drive motor.
Mainpass
Valve already in mainpass.
Valve not connected.
Defective injection valve.
Needle Up/Mainpass
Blockage in the sample loop or needle (no solvent flow).
Needle already in the upper position.
Defective or dirty sensor on the sampling-unit flex board.
Sticking needle-arm assembly.
Defective needle-drive motor.Valve already in mainpass.
Valve not connected.
Defective injection valve.
Table 15 Step Failures, continued
Step Function Probable Failure Modes