Troubleshooting - Filaments F1 Or F2 Open - Instrutech Hornet User Manual

Instruction Manual IGM401 Hornet
9.4

Troubleshooting - Filaments F1 or F2 open

If a filament is open, then trying to start the filament will result in error messages "F1 or F2 open" or similar
displayed error messages. This error may be an indication of open filaments but in some cases it could also be
an indication of faulty electronics.
To determine whether the problem is caused by either a failed filament or the electronics, refer to section 9.8
and follow instructions to remove the ion gauge transducer from the control module. Measure the resistance
(electrical continuity) of filaments 1 and 2 as shown below. A good, intact filament will indicate a resistance of
0.2 ohms on your ohmmeter.
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