40 Troubleshooting and Maintenance Manual
2 General Troubleshooting
Common Types of Errors
Sometimes a problem in your MS will cause an error message to appear in the
MassHunter Workstation software. Some error messages appear only during
tuning. Other messages may appear during tuning or data acquisition.
Some error messages are “latched.” These messages remain active in your data
system even if the condition that caused the message has corrected itself. If
the cause is removed, these messages can be removed by checking instrument
status through the data system.
Difficulty in mass filter electronics
• Pressure in the analyzer chamber is too high
• RFPA is not adjusted correctly
• Mass filter (quad) contacts are shorted or otherwise not working correctly
• Mass filter is not working correctly
• MS electronics are not working correctly
Difficulty with the photo multiplier or microchannel device
• Broad peaks, such as the solvent peak, eluted while the analyzer was on
• MS electronics are not working correctly
Difficulty with the fan
If a cooling fan fault occurs, the vacuum control electronics automatically shut
off the high-vacuum pump and the ion source and mass filter heaters.
Therefore, the message: “The system is in vent state” may also appear. It is
important to note that even though the high-vacuum pump is off, the analyzer
chamber may not actually be vented. See “The system is in vent state” on
page 43 in this section for precautions to take.
• The fan is disconnected
• The fan has failed
• MS electronics are not working correctly
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