Maintenance Messages - ABB Endura AZ series User Manual

Endura AZ series integral and remote transmitter
Combustion oxygen monitor

8.2.3 Maintenance Messages

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