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(1) "Low Light Transmission" alarm is occurred.
→ 1) When the light axis is adjusted, do the gas temperature and the temperature differ from each other
too much?
→ Yes (The stack might have been deformed by the temperature, resulting in deflection of light axis. Re-adjust the light
axis.)
→ 2) Has the device attached to the flange been used for a long period or set long before?
→ Yes (The companion flange might be rusty and might have been distorted by the weight of the device. Take such
counter-measures as supporting the companion flange.)
→ 3) Is the device installed in dusty environment?
→ Yes (Install it in an environment where dust quantity is 5 to 10g/Nm
tions).)
→ 4) Is there condensation on the lens because of high moisture?
→ Yes (Increase the quantity of air purge so as not to form condensation on the lens.)
→ 5) Is the air purge rate insufficient and are the lenses dirty? Or is the measuring light path blocked by
dust?
→ Yes (Increase the air purge rate so as not to get the lenses dirty.)
→ 6) Are the lenses on the receiver and transmitter units broken?
→ Yes (If the lens was damaged by a physical impact, contact the manufacturer. If it was broken by such influences as tem-
perature, check if the device is used in the environment allowed by the specifications and use it in a proper envi-
ronment. )
→ 7) Is the device installed in a place where frequency fluctuates widely between 20 and 40Hz?
→ Yes (Contact the manufacturer. Counter-measures should be taken such as altering the resonance frequency by changing
the device length.)
→ 8) Other
→Yes (Contact the manufacturer.)
(2) "LD Failure" alarm is occurred.
→ 1) Is laser emitted?
→ No (In the case of ammonia meter, use an IR card and the like to check if light is emitted. If it has been used for more
than 10 years, its life span might have expired. Contact the manufacturer.)
(3) "LD Temperature Error" alarm is occurred.
→ 1) Is the device installed and used in a place, which does not meet the specifications?
→ Yes (Use the device in the environment, which meets the specifications.)
→ 2) Is the device used in environment where temperature is out of the specified range?
→ Yes (The specified temperature for this device is 450°C or less. Take counter-measures such as changing a place to in-
stall it.)
→ 3) Other
→ Yes (The device might be out of order. Contact the manufacturer.)
(4) "Connection Error" alarm is occurred.
→ 1) Is any wire forcibly bent, causing a contact failure in the connector unit?
→ Yes (Review the wiring.)
→ 2) Is RS422 in the control unit connected correctly?
→ No (Wire it correctly.)
→ 3) Is any wiring cut off?
→ Yes (Contact the manufacturer.)
→ 4) Others
→ Yes (The device (DPU board, PD digital substrate) might be out of order.)
(5) "High Gas Temperature" alarm is occurred.
→ 1) Is the device used in environment, where the gas temperature is out of the specified range?
→ Yes (The specified gas temperature for this device is 450°C or less. Take counter-measures such as changing a place to
install it.)
→ 2) Is the analog input setting range of temperature in the "Analog Input" screen correct?
→ No (Input the setting range of analog input correctly.)
8. TROUBLESHOOTING
3
(according to installation environment condi-
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INZ-TN1ZSS-E
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