154 Micro Motion Series 1000 and Series 2000 Transmitters
Troubleshooting
3 rapid flashes,
followed by pause
Sensor not recognized Check wiring between transmitter and sensor (9-wire remote
installation or remote core processor with remote transmitter
installation). Refer to Appendix B for diagrams, and see your
transmitter installation manual.
Improper configuration Check sensor characterization parameters. See Section 6.2.
Broken pin between
sensor and core
processor
Contact Micro Motion. See Section 12.3.
4 flashes per second Fault condition Check alarm status.
OFF Core processor
receiving less than 5
volts
• Verify power supply wiring to core processor
. Refer to Appendix B for
diagrams.
• If transmitter status LED is lit, transmitter is receiving 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 switched. See Section 12.14.1, and refer to
Appendix B for diagrams. Otherwise, contact Micro Motion (see
Section 12.3).
• If transmitter status LED is not lit, transmitter is not receiving power.
Check power supply. See Section 12.14.1, and refer to Appendix B
for diagrams. If power supply is operational, internal transmitter,
display, or LED failure is possible. Contact Micro Motion. See
Section 12.3.
Core processor
internal failure
Contact Micro Motion. See Section 12.3.
Table 12-12 Enhanced core processor LED behavior, meter conditions, and remedies
LED behavior Condition Possible remedy
Solid green Normal operation No action required.
Flashing yellow Zero in progress If calibration is in progress, no action required. If no calibration is in
progress, contact Micro Motion. See Section 12.3.
Solid yellow Low severity alarm Check alarm status.
Solid red High severity alarm Check alarm status.
Flashing red (80% on,
20% off)
Tubes not full If alarm A105 (slug flow) is active, see Section 12.17.
If alarm 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.
Flashing red (50% on,
50% off)
Electronics failed Contact Micro Motion. See Section 12.3.
Table 12-11 Standard core processor LED behavior, meter conditions, and remedies continued
LED behavior Condition Possible remedy
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