Emerson Rosemount OCX8800A - Page 227

Potential cause
Heater electronics failure.
Recommended actions
Check heater fuse F3 in electronics housing per Figure 9-1.
• If open, locate and correct cause of overload.
• If F3 is not open or if cause of overload cannot be found, replace
electronics package.
9.3.20 COe Htr Failure
Combustibles sensor heater could not reach final temperature.
Potential cause
COe heater circuit wiring open.
Recommended actions
1. Check COe heater circuit for broken wire or loose connection per Figure
9-2 and Figure 10-9.
2. Repair broken wire or loose connection.
Potential cause
COe heater open.
Recommended actions
1. Check resistance of COe heater per Figure 10-9.
Normal COe heater resistance is 97.7 Ohms.
2. Replace COe heater if heater is open or has a large resistance.
Potential cause
Heater electronics failure.
Recommended actions
Check heater fuse F3 in electronics housing per Figure 9-1.
• If open, locate and correct cause of overload.
• If F3 is not open or if cause of overload cannot be found, replace
electronics package.
9.3.21
SB Htr Failure
Sample block heater could not reach final temperature.
Potential cause
Sample block heater circuit wiring open.
Manual
Troubleshoot
00809-0500-4880 December 2022
Rosemount OCX8800A 227