Thermo Scientific Dionex ICS-5000 Operator's Manual page 250

Dionex ICS-5000 Operator's Manual
4. Observe a run to see whether the high pressure limit is triggered when
injection occurs; if it is, the injection valve may be the source of the
blockage (i.e., the rotor seal or stator may need to be replaced). Contact
Technical Support for Dionex products for assistance.
This function cannot be adjusted by the user.
This error occurs if you attempt to change a parameter that users are not
allowed to adjust.
To troubleshoot:
Only Thermo Fisher Scientific Service Representatives can change this
parameter.
Upper pressure limit exceeded.
This error occurs if the upper pressure limit specified in the program is
exceeded. The running batch is aborted (default) and this message appears.
To troubleshoot:
1. Inspect the tubing for blockage or crimping; replace as needed (see
Section
2. To determine the source of the high backpressure, isolate segments of the
flow path:
a. Remove the pump outlet tubing at the injection valve.
b. Press the
pump.
c. On the Chromeleon 7 ePanel Set or Chromeleon 6.8 panel tabset, set
the Flow rate to 0.01 mL/min for a capillary IC system or 1.0 mL/min
for an analytical IC system and record the backpressure.
d. Disconnect all components after the injection valve.
e. One at a time, reconnect each component of the flow path. If
reconnecting a component causes an abnormal increase in
backpressure, replace the component. Replace as many components
234
9.3). Be careful not to overtighten fittings.
POWER
button on the front of the DP/SP to turn on the
Doc. 065342-06 12/11