4
2 Troubleshooting
2.1 Abnormal operating pressure
The PU-1580 continually monitors the operating pressure. Such monitoring is helpful
in detecting not only pump problems, but also problems such as clogged line filters.
Jasco recommends that the operating pressure and the pressure variation under
normal operating conditions be monitored closely.
This chapter describes likely causes for problems that might occur while using the
PU-1580. Refer to Fig. 2.1 for a list of part names used in this chapter. The
descriptions presented in this chapter are primarily concerned with pump problems
and how to deal with these problems.
2.1.1 TROUBLE OVER PRESS errors
Table 2.1 Dealing with TROUBLE OVER PRESS errors
Cause
Confirmation Method
What to Do
Downstream side of pump is
clogged
For example, a clog
occurring in the manual
injector, autosampler,
column filter, tubing, fittings,
or other sections.
Remove and examine devices
and/or part(s) that may be
clogged in the flow route
Refer to the
appropriate
manual
Line filter is clogged
Operate the pump without
anything connected to the outlet
port. If the pressure is 2.0 MPa
or higher when pumping at 10
ml/min, the line filter is clogged
Replace the
line filter
(See Section
5.2)
Internal damper or internal
tubing(S) is clogged
Remove the outlet port line filter
and pump the solvent. If the
pressure is 2.0 MPa or higher
when pumping at 10 ml/min, the
internal damper or an internal
tubing is clogged.
This problem
requires service
by trained
JASCO service
personnel.
Contact your
local JASCO
distributor.
2.1.2 TROUBLE UNDER PRESS errors
Exceedingly low pressure may occur for one of two reasons. The first is that the
pump is not able to deliver solvent at the specified flow rate. The second is the
presence of a leak (such as a leak downstream from the pump) causing the actual
flow rate to be lower than specified, even though the solvent delivery capacity is
nominal. Table 2.2 lists potential causes, confirmation methods, and methods for
solving problems that may arise due to exceedingly low pressure.