ABB LS4000 Operating Instructions Manual page 111

Error code Meaning and cause
17 LINE TRACKING FAILURE
The analyzer has detected a spectroscopy
error with one of the following causes:
 Unknown process gas in process
 Incorrect wavelength
 The operating temperature of the
transmitter unit is outside the permit-
ted range
 Analyzer malfunction
21 RX WRITE FAIL
Data transmission between the transmit-
ter unit and receiver unit is disrupted.
22 RX READ FAIL
Data transmission between the transmit-
ter unit and receiver unit is disrupted.
24 TX FIRMWARE TOO OLD
The transmitter unit has an earlier version
of the firmware that is not compatible
with the device software.
25 TX FIRMWARE TOO NEW
The transmitter unit has a later version of
the firmware that is not compatible with
the device software.
26 RX FIRMWARE TOO OLD
The receiver unit has an earlier version of
the firmware that is not compatible with
the instrument software.
27 RX FIRMWARE TOO NEW
The receiver unit has a later version of the
firmware that is not compatible with the
instrument software.
30 DMA RAMP TRANSFER
Data transmission between the transmit-
ter unit and receiver unit is disrupted.
32 LASER TEMP TOO HIGH
The temperature in the transmitter unit or
in the receiver unit has exceeded the
maximum permitted value.
All others Unknown or cannot be resolved on your
own
OI/LS4000/NH3/H2O-EN Operating instruction LS4000 for NH
How to resolve the error
 Disconnect the analyzer from the sup-
ply voltage. Apply test gas (in the pro-
cess or in a validation cell). For the test
gas, use a gas mixture that contains the
measured component in a concentra-
tion suitable for generating a signifi-
cant change in the measured value dis-
play. Initialize the analyzer.
 If the error message occurs again, con-
tact the authorized service personnel.
 Check and repair the electrical connec-
tion between the transmitter unit and
receiver unit
 Check and repair the electrical connec-
tion between the transmitter unit and
receiver unit
 Contact the authorized service person-
nel.
 Contact the authorized service person-
nel.
 Contact the authorized service person-
nel.
 Contact the authorized service person-
nel.
 Check and repair the electrical connec-
tion between the transmitter unit and
receiver unit
 Cool the unit using one of the following
methods:
 Shielding from the heat source
 Improving the air circulation
 If the error message persists or a sig-
nificantly incorrect measurement result
is displayed, contact the authorized
service personnel.
 Inform authorized service personnel of
the error code
and H O
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