AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 335
Fidas24: Troubleshooting
Flow error
Sample gas inlet nozzle or sample gas filter clogged
• Check whether sample gas inlet nozzle and sample gas filter in the sam-
ple gas terminal are clogged.
• Replace sample gas filter (see page 279).
Temperature problem
Connecting leads of the temperature sensor or the heater discon-
nected.
• Check the connecting leads and connectors.
• Check the fit of the leads in the wire end ferrules.
• Inspect power supply of the heater.
Unstable readings
Vibrations
• Reduce vibration at the installation site.
Sample gas path leaky
• Check gas path in the analyzer module and in the sampling modules for
seal integrity.
Loss of sensitivity
• Have sample gas nozzle replaced by Service.
Sample gas outlet pressure too high
• Check air jet injector for congestion, if necessary clean (see page 281).
Increase instrument air pressure. Check air discharge line; it must have a
large internal diameter.
Combustion air contaminated
• Check combustion gas supply
Fluctuating process gas pressures
• Check the supply of instrument air, combustion air and combustion gas
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