General Troubleshooting 2
Troubleshooting and Maintenance Manual 43
Difficulty with the HED supply
The only time this error occurs is if the output of the supply cannot get to its
destination (the HED).
• Large peak, such as the solvent peak, eluted while the analyzer was on
• Pressure in the analyzer chamber is too high
• Detector is not working correctly
• MS electronics are not working correctly
Difficulty with the high vacuum pump
This indicates the pump failed to reach 50% of full speed within 10 minutes or
experienced a fault.
You must switch the MS off and back on to remove this error message. Be sure
the turbo pump has slowed down before switching off the MS. The message
will reappear if the underlying problem has not been corrected.
• Large vacuum leak is preventing the turbo pump from reaching 50% of full
speed
• Foreline pump is not working correctly
• Turbo pump is not working correctly
• Turbo pump controller is not working correctly
• MS electronics are not working correctly
High foreline pressure
• Excessive carrier gas flow (typically > 5 mL/min)
• Excessive solvent volume injected
• Large vacuum leak
• Severely degraded foreline pump oil
• Collapsed or kinked foreline hose
• Foreline pump is not working correctly
Internal MS communication fault
• MS electronics are not working correctly
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