Thermo Scientific Dionex AS-DV, Operator'S Manual

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4 • Troubleshooting
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USB cable not connected
Make sure the USB cable is securely connected between the Dionex AS-DV
and the Chromeleon PC or IC system.
•
Vial not sensed
1. Make sure that a cap is installed in each PolyVial. Vials without caps are
sensed as empty positions (see Section 2.2.1 ).
2. The vial detection sensors are blocked, dirty, or faulty. Contact Technical
Support for Dionex products for assistance.
4.6 Autosampler Stops Operating
•
Sample loading backpressure exceeds 690 kPa (100 psi)
Refer to Section 4.7 to isolate and eliminate the source of backpressure.
•
Autosampler is jammed
In the event of a jam, the alarm will flash and an error will be recorded in the
Chromeleon audit trail. See
Section 4.8 for troubleshooting.
4.7 Excessive Backpressure
•
Injection valve in wrong position
On the Dionex AS-DV ePanel (in Chromeleon 7) or Control panel on the
panel tabset (in Chromeleon 6.8), toggle the valve position.
•
Restriction in the liquid flow path
1. If the high backpressure persists, follow the liquid flow path backward
from the injection valve, through the high-pressure valve (if installed),
loosening fittings and reconnecting them until you locate the restriction.
2. If the restriction is in the optional high-pressure valve or the injection
valve of the IC system, disassemble the valve and rebuild it (see
Section 5.5 ). Inspect the port faces and replace them if necessary (see
Section 5.6 ).
3. If the restriction is in the sampling tip (or the tubing between the valve
and the sampling tip), replace the sampling tip (see Section 5.3 ).