The procedures described in this section can be done with the binary pump in place in the system stack.
Procedure | Typical Frequency | Notes |
|---|---|---|
| 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 ₂O with purge valve open) indicates blockage Solvent dripping out of waste outlet when valve is closed | |
| During yearly maintenance | Necessary to get access to pump seals and pistons | |
| Yearly, or if pump performance indicates seal wear | Leaks at lower pump head side, unstable retention times, pressure ripple unstable — run Pump Leak Rate Test for verification Seal life time shorter than normally expected — check pistons while changing the seals | |
| 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 | |
| If leaking externally If solenoid is defective | Error messages “Inlet Valve Fuse” or “Inlet Valve Missing” | |
| If internally leaking | Pressure ripple unstable, run Pump Leak Rate Test for verification | |
| If internally leaking If solenoid is defective | Cross port flow Error message “Valve Failed” |
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id: 3836328203