Emerson Micro Motion 1500 Configuration And Use Manual page 158

Troubleshooting
Table 10-8: Standard core processor LED states
LED state
3 rapid flashes, followed by
pause
4 flashes per second
OFF
Table 10-9: Enhanced core processor LED states
LED state
Solid green
Flashing yellow
Solid yellow
Solid red
Flashing red (80% on, 20% off)
Flashing red (50% on, 50% off)
Flashing red (50% on, 50% off,
skips every 4th)
152
(continued)
Description
Sensor not recognized
Improper configuration
Broken pin between sensor and
core processor
Fault condition
Core processor receiving less
than 5 volts
Core processor internal failure
Description
Normal operation
Zero in progress
Low-severity alert
High-severity alert
Tubes not full
Electronics failed
Sensor failed
Micro Motion Model 1500 Transmitters with Analog Outputs
Recommended actions
Check wiring between transmitter and sensor.
Check sensor characterization parameters.
The meter requires factory service.
Check alert status.
• Verify power supply wiring to core processor.
• If transmitter status LED is lit, transmitter is re-
ceiving power. Check voltage across terminals
1 (VDC+) and 2 (VDC–) in core processor. If
reading is less than 1 VDC, verify power supply
wiring to core processor. Wires may be switch-
ed.
• If transmitter status LED is not lit, transmitter
is not receiving power. Check power supply. If
power supply is operational, internal transmit-
ter, display, or LED failure is possible – the me-
ter may require factory service.
The meter requires factory service.
Recommended action
No action required.
No action required.
Check alert status.
Check alert status.
• If alert A105 (slug flow) is active, refer to the
recommended actions for that alert.
• If alert A033 (tubes not full) is active, verify
process. Check for air in the flow tubes, tubes
not filled, foreign material in tubes, or coating
in tubes.
The meter requires factory service.
The meter requires factory service.