- BSM compresses to about 9,000-10,000 psi during dynamic leak test, and then terminates with error: "unable to compress" on primary pump
- Accumulator pump passes leak test
- The pump is airtight between the check valve on accumulator pump and the vent valve
- ACQUITY UPLC BSM
- ACQUITY H-Class QSM
- ACQUITY I-Class BSM
Traces of rust and scratches on the head support plate or the seal wash plate cause a leak between them.
FIX or WORKAROUND
Replace the head support plate (700002601) or the seal wash plate, or both.