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(1) "Low Light Trans" alarm
1) Does the gas temperature when you carry out the measurement differ from the temperature at the
time of light axis adjustment?
→ If yes, the stack might have been deformed by temperature change, which resulted in deflection of the light axis.
Re-adjust the light axis.
2) Have you been using the analyzer for years, or, is the analyzer connected to a flange installed long
time ago?
→ If yes, the companion flange may have corroded and deformed due to the weight of the equipment. Take measures, for
example, adding a support for the flange.
3) Does the sample gas contain a large amount of dust?
→ The dust amount must meet the requirements of the sample gas. Note that the dust requirements vary with the target gas,
analyzer specification, optical path length, particle size of dust, and other conditions.
4) Is there condensation on the lenses of the transmitter unit and the receiver unit?
→ If yes, increase the amount of purge air to prevent condensation.
5) Does the lenses get dirty because of deficient purge, or, does the optical path is interrupted by dust?
→ If yes, increase the purge air flow rate to prevent the lenses from getting dirty.
6) Is the lens(es) of the transmitter unit and/or the receiver unit broken?
→ If yes, contact us. The lenses can be broken by physical shock or by temperature beyond the allowable range. Be sure to
use the analyzer under the specified environment.
7) Is the analyzer installed in the place where has a vibrational frequency of 20–40 Hz?
→ If yes, contact us. We need to take some measures, for example, changing the length of the system to suppress the reso-
nant frequency.
8) In other cases, contact us.
(2) "LD Temp" error
1) Is the analyzer installed in the environment beyond the requirements?
→ If yes, take necessary measures to meet the requirements.
2) Is the gas temperature beyond the range?
→ See Appendix 1 to check the allowable gas temperature, and take measures to meet the requirements, for example,
change the position of the analyzer.
3) In other cases, the analyzer may have failed. Contact us.
(3) "Connection Error"
1) Is there poor contact around connector due to inappropriate wiring?
→ If yes, redo the wiring.
2) Is there disconnection of wire?
→ Contact us.
3) In other cases, the CPU board and/or the PD digital board may have failed. Contact us.
(4) "High Gas Temp" alarm
1) Is the gas temperature beyond the range?
→ See Appendix 1 to check the allowable gas temperature, and take measures to meet the requirements, for example,
change the position of the analyzer.
2) Are the H/L limits used for the gas alarm properly set?
→ Set the limits to appropriate values in the alarm setting screen.
(5) Gas pressure "Out of Range" alarm
1) Is the gas pressure beyond the range of allowable gas pressure?
→ Take necessary measures to keep the gas pressure within ±10 kPa.
2) Is the analog input setting for the gas pressure appropriate?
→ Make an appropriate setting for gas pressure in the analog input screen.
8. TROUBLESHOOTING
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INZ-TN8ZSS-E
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