Troubleshooting and Test Functions 3
1100 Series WS MWS Reference Manual 91
Troubleshoot ing
If the well-plate sample is unable to perform a specific step due to a hardware
failure, an error message is generated. You can use the step commands to
perform an injection sequence, and observe how the well-plate sampler
responds to each command.
Table 17 summarizes the step commands, and lists the error messages and
probable causes associated with each possible failure.
Needle into Seat Lowers the needle arm into the seat.
Mainpass Switches the injection valve to the
mainpass position.
Needle Up/Mainpass Lifts the needle arm to the upper
position and Switches the injection
valve to the mainpass position.
Tabl e 16 Step Commands (continued)
Step Action Comments
Tabl e 17 Step Failures
Step Function Probable Failure Modes
Bypass Valve not connected.
Defective injection valve.
Plunger Home Defective or dirty sensor on the sampling-unit flex board.
Defective metering-drive motor.
Needle Defective or dirty sensor on the sampling-unit flex board.
Sticking needle-arm assembly.
Defective needle-drive motor.
Draw Sum of all draw volumes exceeds 100 µl (or 40 µl).
Defective metering-drive motor.
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