Troubleshooting
Troubleshooting Guides
6-4
Model 410
i
Instruction Manual
Thermo Fisher Scientific
Alarm Message
Possible Cause
Action
Alarm - Motor Speed
Defective measurement
interface board
Replace measurement
interface board.
Defective chopper motor or
cable
Check chopper motor cable.
Replace chopper motor.
Alarm - CO
2
Conc.
Concentration has exceeded
range limit
Check to insure range
corresponds with expected
value. If not select proper
range.
Concentration low
Check user-defined low set
point, set to zero.
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.