ABB AO2000-LS25 Manual page 71

AO2000-LS25 LASER ANALYZERS | OI/AO2000-LS25-EN REV. D
Fault message Explanations and actions
Low laser temp. ERROR
High laser temp. The laser temperature regulation has failed and the laser is too cold/warm.
The instrument has entered FAULT mode and attempts automatic restart after
one hour.
Low box temp. ERROR
High box temp. Internal temperature of transmitter or receiver is exceeding the operating limit.
The instrument has entered FAULT mode and attempts automatic restart after
one hour.
EEPROM error ERROR
Failure of the internal memory of the device.
Self-test fail ERROR
The device has detected a self-test error during start-up.
Low line position ERROR
High line position The device has detected a spectroscopic fault. This can have several causes:
No absorption line Unknown interference gas in process, incorrect laser temperature (wavelength),
transmitter unit is operating outside acceptable temperature range, or laser
malfunction.
ERROR
Saturation of direct
The photodetector is saturating or transmission is > 130%.
If the error remains when the receiver window is obscured, this is an electronic
fault. Otherwise the error may occur after replacement of laser module or receiver
electronics.
Saturation of harm. ERROR
A second harmonic signal is saturating. This may be for one of the following
reasons:
The gas concentration is too high or the length of the optical path for
measurement is too long.
All other error messages –
Troubleshooting instructions
Allow the transmitter unit to cool.
Improve ventilation, provide heat shielding if
necessary.
If transmitter is not overheated, the error might
indicate a bad electrical contact or other hardware
failure.
If the error persists, contact ABB Service.
Check the ambient temperature of the transmitter
and receiver units.
Improve ventilation, provide heat shielding if
necessary.
If the error persists, contact ABB Service.
Upload a backup settings file (with the original
settings) to the device.
If the error persists, contact ABB Service.
Restart the device.
If the error persists, note the messages on the
LCD, download the error record and system log
and contact ABB Service.
Check the device with the calibration cell with a
gas concentration suitable for calibration, run the
device continuously for more than 70 minutes.
If the error persists or if the calibration is
significantly incorrect, contact ABB Service.
Reduce receiver amplification (if possible) or
transmission.
If the error persists, contact ABB Service.
Reduce the amplification for the second harmonic
signal in the receiver (contact service personnel for
details), or use a shorter measurement length for
high
gas concentrations.
If the error remains when the receiver window is
obscured, this is an electronic fault.
Contact ABB Service.
Note all LCD messages and contact ABB Service.
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