Hi, our 1260 Infinity 2 keep havin problem at the pump, we are about to express exchange the G7104C module for the third time in 2 months.
The pressure suddenly fell to 0 bar and keeps spiking to 20 bars and the system won't go back to normal constant pressure, neither priming or conditioning the pump.
Since the Agilent technicians at the phone every time say "it''s better to change the module", because the routine tests (pressure test, frit change, prime the degasser with luer lock syringe, check for leaks,etc etc) won't resolve the problem.
We use Acetonitrile/Methanol/Water and acid water at pH 3 (with orthophosphoric acid).
We use Zorbax SB-C8 columns.
The G7104C is untouched, 2 weeks of life.
We had a 1100 system with pump module G1311 and in 6 years we never had problems.
Can you suggest me something to try or to check before calling for another express exchange?