
Endura AZ series integral and remote transmitter
Combustion oxygen monitor
8 Troubleshooting
84
IM/AZ20E–EN Rev. F
8.2.3 Maintenance Messages
Message range: M042.029 to M022.020
Status
Icon
Diagnostic Message
Displayed
Possible Cause(s)
Corrective Measure(s)
––M042.029––
ACCURACY CHECK
STABILITY FAILED
Check test gas
connections.
Re-calibrate
Cell input measurement is too
noisy.
Check gas connections.
Repeat accuracy check.
If problem persists contact local
ABB service.
––M040.035––
SENSOR IMPEDANCE
WARNING
Cell is reaching
end of its life.
Replace cell
Cell is reaching end of its life.
Replace cell.
––M038.034––
SLOW CELL
RESPONSE
Check gas pipes.
Replace cell.
Blocked or broken test gas pipes
or faulty cell.
Check gas pipes.
Replace cell.
––M036.037––
SLOW RECOVERY
RATE
Diffuser blocked
Clean diffuser?
Diffuser is blocked.
Clean or, if necessary, replace
diffuser.
––M034.031––
CAL. OFFSET
NEAR LIMIT
Cell is reaching
end of its life.
Replace cell.
Cell is reaching end of its life.
Replace cell.
––M032.030––
CAL. FACTOR
NEAR LIMIT
Cell is reaching
end of its life.
Replace cell.
Cell is reaching end of its life.
Replace cell.
Table 8.4 Diagnostics – Maintenance Messages