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GAA610-M
ADVANCED EMISSION GAS MONITORING SYSTEM | OI/GAA610-M-EN REV. B
… 12 Diagnosis / Troubleshooting
AO2020-Uras26 problems
Problem
Cause
Remedy
Temperature Problem
Faulty temperature sensor or heater
connections
Check the connecting lines and plugs.
Check the line seating in the insulated jackets.
Defective thermal link
Check thermal link continuity and replace if necessary.
Unstable Readings
Vibration
• Take measures to reduce vibration.
Permissible vibration levels: for analyzer max.
0.04 mm at 5 to 55 Hz, 0.5 g at
55 to 150 Hz; when installed in cabinet max. 0.01 m/s2 at 0.1 to 200 Hz.
Gas path leakage
Check the integrity of the analyzer module gas paths and (if applicable) of the
lines to the gas module.
Loss of sensitivity
Check the sensitivity variation:
• Indication < 75%: The “Maintenance request” status signal appears.
The detector involved will need to be changed soon.
• Indication < 50%: The “Failure” status signal appears.
Replace the detector involved.
Uneven emitter modulation
• Remove the emitter.
CAUTION
The emitter temperature is approx. 60 °C in the thermostat version of the
Uras26!
• Replace the AO2020 unit or consult service contact.
• Have the emitter and modulator assembly checked by the service
department.
Analyzer cabinet problems
Problem
Cause
Solution
Flow to analyzer not constant / too low
Solenoid valve plugged
Untie sampling line on both ends of the solenoid valve and carefully
clean the valve from both sides with compressed air
End piece of sampling probe black /
plugged
Accumulation of hydrocarbons
Untie sampling line from solenoid valve before cleaning the complete
line with compressed air from the top of the stack to the black /
plugged end
Humidity in one of the filter elements
Gas cooler malfunctioning
Check function of the gas cooler. If not working, see above "Sample gas
cooler problems"
Gas flow to analyzer disrupted
Water trap closed after contact with
condensate
Replace the water trap
"Temperature Alarm" in status signal board
blinking red
Heating in sampling probe or sampling line
damaged
Pt100 broken, needs to be replaced by service personnel
Temperature controller defective
Temperature controller needs to be replaced by service personnel
