Emerson Series 3000 MVD Manuel D’Utilisation
Configuration and Use Manual
233
Diagnostics and Troubleshooting
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Table 22-14
Standard core processor LED behavior, flowmeter conditions, and remedies
LED behavior
Condition
Possible remedy
1 flash per second
(ON 25%, OFF 75%)
(ON 25%, OFF 75%)
Normal operation
No action required.
1 flash per second
(ON 75%, OFF 25%)
(ON 75%, OFF 25%)
Slug flow
See Section 22.7.3.
Solid ON
Zero or calibration in
progress
progress
If calibration is in progress, no action required. If no calibration is in
progress, contact Micro Motion.
progress, contact Micro Motion.
Core processor
receiving between 11.5
and 5 volts
receiving between 11.5
and 5 volts
Check power supply to transmitter.
3 rapid flashes,
followed by pause
followed by pause
Sensor not recognized
Check wiring between transmitter and sensor. See Section 22.11.2.
Improper configuration
Check sensor characterization parameters. See Section 22.16.
Broken pin between
sensor and core
processor
sensor and core
processor
Contact Micro Motion.
4 flashes per second
Fault condition
Check alarm status. See Section 22.6.
OFF
Core processor
receiving less than 5
volts
receiving less than 5
volts
• Verify power supply wiring to core processor. See Section 22.11.2
• If transmitter display is lit, transmitter is receiving power. Check
voltage across terminals 1 (VDC+) and 2 (VDC–) in core processor.
Normal reading is approximately 14 VDC. If reading is normal,
internal core processor failure is possible. Contact Micro Motion. If
reading is 0, internal transmitter failure is possible. Remove the wires
from core processor terminals 1 and 2, and check the voltage across
the wires. If the voltage reading is now ~14 VDC, the transmitter is
normal. If the voltage reading is not ~14 VDC, contact Micro Motion.
If reading is less than 1 VDC, verify power supply wiring to core
processor. Wires may be switched. See Section 22.11.2.
Normal reading is approximately 14 VDC. If reading is normal,
internal core processor failure is possible. Contact Micro Motion. If
reading is 0, internal transmitter failure is possible. Remove the wires
from core processor terminals 1 and 2, and check the voltage across
the wires. If the voltage reading is now ~14 VDC, the transmitter is
normal. If the voltage reading is not ~14 VDC, contact Micro Motion.
If reading is less than 1 VDC, verify power supply wiring to core
processor. Wires may be switched. See Section 22.11.2.
• If transmitter display is not lit, transmitter is not receiving power.
Check power supply. If power supply is operational, internal
transmitter or display failure is possible. Contact Micro Motion.
transmitter or display failure is possible. Contact Micro Motion.
Core processor
internal failure
internal failure
Contact Micro Motion.
Table 22-15
Enhanced core processor LED behavior, flowmeter 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.
progress, contact Micro Motion.
Solid yellow
Low severity alarm
Check alarm status.
Solid red
High severity alarm
Check alarm status.
Flashing red (80% on,
20% off)
20% off)
Tubes not full
If alarm A105 (slug flow) is active, see
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.
the flow tubes, tubes not filled, foreign material in tubes, or coating in
tubes.
Flashing red (50% on,
50% off)
50% off)
Electronics failed
Contact Micro Motion.