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Manual
00809-0500-4880
Potential cause
Electronics package failure.
Recommended action
Replace electronics package.
9.3.9
O2 TC Open
Oxygen sensor heater thermocouple open.
Potential cause
O
thermocouple or thermocouple circuit open.
2
Recommended actions
9.3.10
COe TC Open
Combustibles sensor heater thermocouple open.
Potential cause
Combustibles sensor thermocouple open.
Recommended actions
9.3.11
SB TC Open
Sample block heater thermocouple open.
Potential cause
Sample block heater thermocouple or thermocouple circuit open.
Recommended actions
Rosemount OCX8800A
1. Check O
thermocouple and circuit wires for breaks or loose
2
connections per
Figure 9-2
2. Repair breaks or loose connections or replace failed thermocouple.
3. Perform procedure in
1. Check thermocouple resistance (lead to ground) of reference and active
thermocouples per
2. If either thermocouple is open or shorted to ground, replace
combustibles sensor.
1. Check sample block thermocouple and circuit wires for breaks or loose
connections per
Figure 9-2
2. Repair breaks or loose connections or replace failed thermocouple.
3. Perform
Reset
to continue operation.
and
Figure
10-8.
Reset
to continue operation.
Figure 9-2
and
Figure
and
Figure
10-8.
Troubleshoot
December 2022
10-10.
223
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