General Symptoms - Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual

General Symptoms

This section describes symptoms you might observe when first turning on the
GC/MSD system. All of these symptoms would prevent operation of the
system.
GC does not turn on
Nothing happens when the GC is switched on. The GC fans do not turn on and
the keypad display does not light.
• Disconnected GC power cord
• No voltage or incorrect voltage at the electrical outlet
• Failed fuse in the GC
• GC power supply is not working correctly
MSD does not turn on
Nothing happens when the MSD is switched on. The foreline pump does not
start. The cooling fan for the high vacuum pump does not turn on. The local
control panel is not on.
• Disconnected MSD power cord
• No voltage or incorrect voltage at the electrical outlet
• Failed primary fuses
• MSD electronics are not working correctly
Foreline pump is not operating
The MSD is receiving power (the fan is operating and the local control panel is
lit) but the foreline pump is not operating.
• Large air leak (usually the analyzer door open) has caused pumpdown
• Disconnected foreline pump power cord
• Malfunctioning foreline pump
• Check power switch on foreline pump
5975 Series MSD Troubleshooting and Maintenance Manual
failure. See "Pumpdown failure shutdown"
cycle the MSD to recover from this state.
General Troubleshooting
on page 174. You must power
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