Troubleshooting
Table
LED behavior | Condition | Possible remedy |
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Solid green | Normal operation | No action required. |
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Flashing yellow | Zero in progress | If calibration is in progress, no action required. If no calibration is in |
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| progress, contact Micro Motion. See Section 1.8. |
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Solid yellow | Low severity alarm | Check alarm status. |
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Solid red | High severity alarm | Check alarm status. |
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Flashing red (80% on, | Tubes not full | If alarm A105 (slug flow) is active, see Section 11.17. |
20% off) |
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| If alarm A033 (tubes not full) is active, verify process. Check for air in | |
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| |
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| the flow tubes, tubes not filled, foreign material in tubes, or coating in |
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| tubes. |
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Flashing red (50% on, | Electronics failed | Contact Micro Motion. See Section 1.8. |
50% off) |
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Flashing red (50% on, | Sensor failed | Contact Micro Motion. See Section 1.8. |
50% off, skips every |
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4th) |
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OFF | Core processor | • Verify power supply wiring to core processor. Refer to Appendix B for |
| receiving less than 5 | diagrams. |
| volts | • If transmitter status LED is lit, transmitter is receiving power. Check |
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| voltage across terminals 1 (VDC+) and 2 |
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| If reading is less than 1 VDC, verify power supply wiring to core |
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| processor. Wires may be switched. See Section 11.14.1, and refer to |
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| Appendix B for diagrams. Otherwise, contact Micro Motion (see |
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| Section 1.8). |
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| • If transmitter status LED is not lit, transmitter is not receiving power. |
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| Check power supply. See Section 11.14.1, and refer to Appendix B |
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| for diagrams. If power supply is operational, internal transmitter, |
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| display, or LED failure is possible. Contact Micro Motion. See |
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| Section 1.8. |
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| Core processor | Contact Micro Motion. See Section 1.8. |
| internal failure |
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11.24.2Core processor resistance test
To perform the core processor resistance test:
1.Power down the transmitter.
2.Remove the core processor lid.
3.Disconnect the
4.Measure the resistance between core processor terminals 3 and 4
5.Measure the resistance between core processor terminals 2 and 3 (VDC– and
6.Measure the resistance between core processor terminals 2 and 4 (VDC– and
7.If any resistance measurements are lower than specified, the core processor may not be able to communicate with a transmitter or a remote host. Contact Micro Motion (see Section 1.8).
Compensation
Measurement Performance
Troubleshooting
Defaults
Configuration and Use Manual | 109 |