This Information Applies To: Agilent G7129A/B Autosampler with Sample Thermostat/Cooler G7167-60101 or G7167-60005.
The autosampler may stop working from time to time, potentially giving off loud noises and switching off the light. The only message found in the OL Software Activity Log is "Sample temperature control off", but it is not an error message. A "configuration changed" or "controller stop automation request" may show in red.
Performing the Sample Cooler Function Test with the Lab Advisor Software under Service & Diagnostics may give a "passed" result.
This article gives information on how to proceed if for the cooler tacho condenser fan a constant signal of 0 (Figure 1, top) is shown. Typically the curve should be looking similar to the following example (Figure 1, bottom). The results of the test can be seen by clicking Print Results after the Sample Cooler Function Test has finished.
Figure 1. Signal plots for the Cooler Tacho Condenser Fan - Top: No signal, Bottom: Typical signal. x - time in seconds, y - raw data.
Temporarily, a reset of the module may solve the issue, but it will most likely appear again. Please contact your local Agilent Support representative if the problem continues.
Learn how to effectively troubleshoot your Agilent 1290 HPLC:
Agilent 1290 Infinity LC Systems with OpenLab CDS ChemStation Learning Path on Agilent University