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Manual
00809-0500-4880
Potential cause
High noise in Rosemount OCX8800 power supply.
Recommended actions
9.3.6
O2 Temp Very Hi or O2 Htr Rmp Rate
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.
Rosemount OCX8800A
1. Check power supply for line noise or voltage fluctuations.
2. Install power line filter kit (PN 6A00171G01) or high quality line filter for
input power.
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
Figure 9-2
and
Figure
Reset
to continue operation.
Figure 9-2
Reset
to continue operation.
Troubleshoot
December 2022
10-8.
and
Figure
10-8.
221
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