Pump Head Missing - Agilent Technologies 1200 Series Reference Manual

Pump Head Missing

The pump-head end stop in the quaternary pump was not found.
When the quaternary pump restarts, the metering drive moves forward to the
mechanical end stop. Normally, the end stop is reached within 20 seconds,
indicated by an increase in motor current. If the end point is not found within
20 seconds, the error message is generated.
Probable Causes
• Pump head not installed correctly (screws not secured, or pump head not
• Broken plunger.
Suggested Actions
1200 Series QP Reference Manual
seated correctly).
Install the pump head correctly. Ensure nothing (e.g. capillary) is trapped
between the pump head and body.
Exchange the plunger.
Troubleshooting and Test Functions 3
75