1260 Infinity Binary Pump User Manual 153
Maintenance
10
Maintenance Procedures
Maintenance Procedures
The procedures described in this section can be done with the binary
pump in place in the system stack.
Tabl e 1 2 Maintenance procedures
Procedure Typical Frequency Notes
“Exchanging the Purge Valve Frit or the
Purge Valve” on page 154
Yearly, or if the frit shows
indication of
contamination or
blockage
If internally leaking
A pressure drop of > 10 bar in low delay volume
configuration and > 20 bar in standard
configuration across the frit (5 mL/min H
2
O
with purge valve open) indicates blockage
Solvent dripping out of waste outlet when valve
is closed
“Removing the Pump Head Assembly” on
page 157
During yearly
maintenance
Necessary to get access to pump seals and
pistons
“Maintenance of a Pump Head without Seal
Wash” on page 159
Yearly, or if pump
performance indicates
seal wear
Leaks at lower pump head side, unstable
retention times, pressure ripple unstable — run
Valve Test for verification
Seal life time shorter than normally expected —
check pistons while changing the seals
“Maintenance of a Pump Head with Seal
Wash” on page 163
Yearly, or if pump
performance indicates
seal wear
Only necessary when Seal Wash Option is
installed. Leaks at lower pump head side, loss
of wash solvent
“Exchanging the Active Inlet Valve (AIV) or
its Cartridge” on page 170
If leaking externally
If solenoid is defective
Error messages “Inlet Valve Fuse” or “Inlet
Valve Missing”
“Exchanging the Outlet Valve” on page 173 If internally leaking Pressure ripple unstable, run Valve Test for
verification
“Exchanging the Solvent Selection
Valve” on page 177
If internally leaking
If solenoid is defective
Cross port flow
Error message “Valve Failed”
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