Specifications

General Troubleshooting 2
5975 Series MSD Troubleshooting and Maintenance Manual 47
Error Messages
Sometimes, a problem in your MSD will cause an error message to appear in
the MSD ChemStation 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
• MSD electronics are not working correctly
Difficulty with the electron multiplier supply
• Large peak, such as the solvent peak, eluted while the analyzer was on
• Pressure in the analyzer chamber is too high
• MSD 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 in this
section for precautions to take.
• One of the fans is disconnected
• One of the fans has failed
• MSD electronics are not working correctly