Thermo Scientific Dionex ICS-5000 Operator's Manual page 249

The pressure in the left-hand working cylinder exceeded the
safety limit.
-or-
The pressure in the right-hand working cylinder exceeded the
safety limit.
-or-
The system pressure exceeded the safety limit.
This error may be caused by a blockage in the system or by a problem with
the column. ("Right-hand" refers to the bottom pump; "left-hand" refers to the
top pump in a dual-pump module.)
To troubleshoot:
1. Check all tubing connections for signs of blockage; 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
as necessary to resume operation at the standard operating
backpressure.
3. As columns age, their backpressure increases. It may be necessary to
compensate for this by increasing the high pressure limit. If the column is
the source of the high backpressure, clean the column. (Refer to the
column manual provided on the Thermo Scientific Reference Library
DVD (P/N 053891) for instructions.) If this does not eliminate the
problem, replace the column.
Doc. 065342-06 12/11
9.3). Be careful not to overtighten fittings.
POWER
button on the front of the DP/SP to turn on the
8 • DP/SP Troubleshooting
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