23/04/2019
Rev 3
35
Check that the ambient air is not polluted and re-zero.
Perform a further adjustment if the problem persists.
II.6.4.CO out of bounds
Out of range.
Check that the ambient air is not polluted and re-zero.
Perform a further adjustment if the problem persists.
II.6.5.CO2 out of bounds
Out of range.
Check that the ambient air is not polluted and re-zero.
Perform a further adjustment if the problem persists.
II.6.6.O2 out of bounds
Out of range.
Check that the ambient air is not polluted and re-zero.
Check sensor connections.
II.6.7.NOx out of bounds
Out of range.
Check NOx sensor connections (optional).
Replace the NOx sensor if the message persists after several attempts
to zero.
II.6.8.Flow too low
Check that the flexible tubes. Check that they are not kinked, twisted or plugged.
Disconnect the sampling probe to see whether the problem is connected with it, or persists.
1) If the probe is disconnected, the message is no longer active:
Check that the sampling tube is not crushed by an external mass.
Clean the probe and the flexible sampling tube with compressed air.
