ZQ/Quattro Micro won't pump down following vacuum error - WKB96370

SYMPTOMS

• ZQ/Quattro Micro vented due to vacuum fault (such as rotary pump failure) and displays a steady red vacuum light on the instrument
• Tune page displays "Vented" state but system does not respond to pump command
• Power-cycling the instrument allows the system to pump down, but Tune page still displays "Vented" state even though vacuum pressure and turbo speed are OK
• VacOK signal is not present to allow system to go into Operate mode

ENVIRONMENT

• ZQ/Quattro Micro

CAUSE

Vacuum error causes hangups in instrument electronics and MassLynx software, which are not cleared by simply rebooting the instrument.

FIX or WORKAROUND

1. Close MassLynx software and reboot the acquisition PC to clear the software errors.
2. Power-cycle the instrument and wait for the EPC to fully reboot. (Use ping epc -t and telnet epc commands to monitor boot cycle.)
3. Open MassLynx software. System should now pump down satisfactorily and show "Vacuum OK" status once Pirani pressure and turbo speeds are in the correct range.

ADDITIONAL INFORMATION