Emerson Rosemount OCX 8800 Reference Manual page 214

Troubleshooting
Table 8-1: Troubleshooting
Line Voltage High (AC power line voltage above maximum, > 278 Vac)
Probable cause
High noise or voltage fluctuations in power supply
Electronics package failure
Htr Relay Failed (Heater relay failure)
Probable cause
High noise or voltage fluctuations in power supply
Electronics package failure
Out Brd Failure (Output board failure)
Probable cause
Electronics package failure
204
(continued)
Recommended correction action
Check power supply for line noise or voltage fluctuations.
Install power line filter kit (PN 6A00171G01) or high quality
line filter for power.
Check power supply voltage and compare with line volt-
age. Replace electronics package if they do not agree with-
in 5%.
Recommended corrective action
Check power supply for line noise or voltage fluctuations.
Install power line filter kit (PN 6A00171G01) or high quality
line filter for power.
Check power supply voltage and compare with line volt-
age. Replace electronics package if they do not agree with-
in 5%.
Recommended corrective actions
Replace electronics package.
OCX 8800