Recommended actions
1. Check power supply for line noise or voltage fluctuations.
2. Install filter power line kit (PN 6A00171G01) or high quality line filter for
input power.
Potential cause
AC power line frequency is outside the usable range of the Rosemount OCX8800
universal power supply.
Recommended action
Correct power supply frequency.
AC power line frequency must be between 50 and 60 Hz.
Potential cause
Electronics package failure.
Recommended action
1. Check power supply frequency with a calibrated oscilloscope or
frequency meter and compare with line frequency.
2. Replace electronics package if they do not agree within 1 Hz.
9.3.29 Line Voltage Low
AC power line voltage below minimum, < 85 Vac.
Potential cause
High noise or voltage fluctuations in power supply.
Recommended actions
1. Check power supply for line noise or voltage fluctuations.
2. Install filter power line kit (PN 6A00171G01) or high quality line filter for
input power.
Potential cause
Electronics package failure.
Recommended actions
1. Check power supply voltage and compare with line voltage.
2. Replace electronics package if they do not agree within five percent.
9.3.30
Line Voltage High
AC power line voltage above maximum, > 278 Vac.
Potential cause
High noise or voltage fluctuations in power supply.
Troubleshoot
Manual
December 2022 00809-0500-4880
232 Emerson.com/Rosemount
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