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Troubleshooting
Troubleshooting Guides
Thermo Fisher Scientific
Model 43i Trace Level-Enhanced Instruction Manual
6-9
Alarm
Message
Possible Cause
Action
Conc.
exceeded range limit
value. If not, select proper range.
Concentration low
Check user-defined low set point, be sure the
min trigger is set as desired.
Alarm - Zero
Check
Alarm - Span
Check
Instrument out of
calibration
Recalibrate instrument.
Alarm - Zero
Autocal
Alarm - Span
Autocal
Check gas supply. Perform manual calibration.
Alarm -
Motherboard
Status
Alarm -
Interface Status
Alarm - I/O Exp
Status
Internal cables not
connected properly
Board is defective
Check that all internal cables are connected
properly. Recycle AC power to instrument. If still
alarming, change board.