Thermo Scientific Dionex ICS-5000, Руководство оператора

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8 • DP/SP Troubleshooting
Doc. 065342-06 12/11
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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.
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.
8.13 DP/SP Does Not Start
•
Power is off
Check that the main power switch on the DP/SP rear panel is turned on.
Press the
POWER
button on the front of the DP/SP to turn on the pump.
•
Flow rate is set to zero
Select a Flow rate on the Chromeleon 7 ePanel Set or Chromeleon 6.8
panel tabset.
•
While being primed, pump starts briefly and an alarm sounds
If the high pressure limit was tripped:
1. Check that the priming valve on the secondary pump head is opened
(see Figure 2-3 ). To open the valve, turn the knob one-half turn
counterclockwise.
2. Check fittings for overtightening. Check tubing for crimping and
replace it as necessary (see Section 9.3 ). Be careful not to overtighten
fittings.