82 Agilent 1200 Preparative Pump User Manual
6 Troubleshooting and Diagnostics
Error Messages
Open Cover
The top foam has been removed.
The sensor on the main board detects when the top foam is in place. If the
foam is removed, the pump is turned OFF within 4s for safety reasons, and the
error message is generated. If the pump is started without cover, this error
message is also generated and the pump is not turned on.
Pressure Above Upper Limit
The system pressure has exceeded the upper pressure limit. This error
condition automatically results in the opening of the purge valve.
Probable cause Suggested actions
1 The top foam was removed during operation
or pump started without cover.
Reinstall the top foam.
2 Foam not activating the sensor. Replace the top foam.
3 Sensor defective. Exchange the main board.
4 Rear of the module is exposed to strong
direct sunlight.
Ensure that the rear of module is not directly
exposed to strong sunlight.
Probable cause Suggested actions
1 Upper pressure limit set too low. Ensure the upper pressure limit is set to a value
suitable for the analysis.
2 Blockage in the flowpath (after the pressure
sensor).
Check for blockage in the flowpath.
3 Defective pressure sensor. Exchange the Multi Assembly.
4 Defective main board. Exchange the main board.
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