Edwards A313-01-985, Instruction Manual

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Maintenance
A313-01-880 Issue A
The pump overheats. Is the inlet filter blocked? Clean or replace the filter.
Is the differential pressure across the
pump too high? Check that your system design
complies with the requirements of
Section 3.2 , and that the pump is
suitable for use in your application.
Is an oil level too high, or has the
incorrect grade of oil been used? Check the oil levels (refer to
Section 5.5 ) or drain the pump and
fill with the correct grade of oil
(refer to
Section 5.7 ).
Are the rotor or rotor/casing
clearances incorrect? Contact your supplier or Edwards for
advice.
Has the cooling-water supply failed
or is the supply inadequate? Check that the cooling-water supply
pipelines are correctly connected to
the pump (see
Section 3.6 ) and that
the supply complies with the
requirements of
Section 2.4 .
There is oil in the gas stream from
the pump. Is an oil level too high? Check the oil levels and if necessary
drain oil from the pump: refer to
Section 5.5 .
Have the shaft seals failed? Replace the shaft seals.
Oil leaks from the drive shaft. Have the lip seals failed? Inspect the lip seals and replace if
necessary.
Oil leaks from between the casing
and an end-cover. Has the casing/end-cover seal
failed? Replace the seal.
Oil leaks from a sight-glass. Is the sight-glass loose? Tighten the securing bolts.
Has the seal failed, or is the glass
cracked? Replace the seal and/or sight-glass
as necessary.
The shaft-seals oil reservoir is empty. Has the reservoir been filled with
oil?
Fill the reservoir with oil as
described in
Section 5.3 .
Are there oil leaks at the shaft end? Replace the lip seal.
If there are no oil leaks at the shaft
end, replace the mechanical shaft
seals and lip seal.
There is a low volume flow through
the pump. Is the inlet filter blocked? Clean or replace the filter.
Is the inlet pressure too low? Check the inlet pipeline for a
blockage, closed valve or other
restriction.
Is the pump worn or damaged? Contact your supplier or Edwards for
advice.
Is the pump unsuitable for your
application? If necessary, redesign your system to
comply with the capabilities of the
pump, or fit a different pump which
provides the necessary performance.
Table 12 - Fault finding (continued)
Symptom Check Actions