Error during dynamic leak test: excessive back-leakage during compression - WKB28156

SYMPTOMS

• Pump fails dynamic leak test
• Error on accumulator pump: "excessive back-leakage during compression".
• If the accumulator test passes - error on primary pump: "Excessive back-leakage during Primary test"

ENVIRONMENT

• ACQUITY UPLC
• ACQUITY UPLC H-Class
• ACQUITY UPLC I-Class
• ACQUITY PREMIER

CAUSE

Failure of accumulator check valve. Ball inside is not moving.

FIX or WORKAROUND

Replace accumulator check valve 700002968 (H-Class & Classic)

Replace accumulator check valve 700005273 (I-Class)

Replace accumulator check valve 700005415 (Acquity Premier)

ADDITIONAL INFORMATION