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Manual
00809-0500-4881
9.3.6
O
Temp Very Hi or O
2
Oxygen sensor heater over maximum temperature, > 1508 °F (820 °C) or oxygen sensor
heater over maximum temperature ramp rate.
Potential cause
Incorrect O
Recommended actions
Potential cause
Incorrect O
Recommended actions
Potential cause
Electronics package failure.
Recommended action
Replace electronics package.
9.3.7
COe Temp Very Hi or COe Htr Ramp Rate
Combustion sensor heater over maximum temperature, > 752 °F (400 °C). or combustibles
sensor heater over maximum temperature ramp rate.
Potential cause
Incorrect COe heater wiring.
Recommended actions
Potential cause
Incorrect COe thermocouple wiring.
Recommended actions
Rosemount OCX8800C
heater wiring.
2
1. Check O
heater wiring per
2
2. Check the wiring at the heater inside the electronics housing.
3. Correct wiring fault.
4. Perform procedure in
thermocouple wiring.
2
1. Check O
thermocouple wiring per
2
2. Check the wiring at the terminal and inside the electronics housing.
3. Correct wiring fault.
4. Perform procedure in
1. Check COe heater wiring per
2. Check the wiring at the heater and inside the electronics housing.
3. Correct wiring fault.
4. Perform procedure in
1. Check COe thermocouple wiring per
2. Check the wiring at the thermocouple and inside the electronics housing.
3. Correct wiring fault.
Htr Rmp Rate
2
Figure 9-2
and
Figure
Reset
to continue operation.
Figure 9-2
and
Reset
to continue operation.
Figure 9-2
and
Figure
Reset
to continue operation.
Figure 9-2
Troubleshoot
April 2023
10-17.
Figure
10-17.
10-18.
and
Figure
10-18.
189
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