Potential Errors - Emerson Rosemount 625IR Manual

Troubleshooting
January 2024
5.2

Potential errors

FAULT reading in control room
suggestions for solutions.
Use the HART
actions.
5.2.1 FAULT reading in control room
Do not return the gas detector to the supplier for repair unless you first complete the
following steps.
Recommended actions
52
through
or Modbus interface to find error codes and follow the recommended
® ®
1. Connect the detector to the HART
recommended action for the status described in
service. Complete this action. If the issue is unresolved, proceed to Step 2.
2. Ensure that the detector has not been exposed to hydrocarbon, such as volatiles
from cleaning agents (acetone or isopropanol), gasoline, diesel, etc.
• If the detector has been exposed to hydrocarbons, remove any hydrocarbon
substances.
• If the detector has not been exposed to hydrocarbons, connect the detector
to the power supply with current metering.
3. Remove the environment shield and clean the lens and mirror.
NOTICE
The detector can detect hydrocarbons used in cleaning.
Avoid cleaning with liquids containing hydrocarbons, such as acetone and
isopropanol.
4. Power up the detector at 24 Vdc.
• If the issue is resolved, inspect the inside of the environment shield for
blocking items and clean the shield.
• If the issue is not resolved, continue to Step 5.
5. Verify that the current consumption is approximately 100 mA.
• If the current consumption is approximately 100 mA, wait for two minutes
(20 minutes if the ambient temperature is below -4 °F (-20 °C). Then continue
to Step 6.
• If the current is not approximately 100 mA, verify that the wiring is correct
and the housing is properly earthed.
— If the wiring is incorrect, go back to Step 4.
— If the wiring is correct, continue to Step 6.
6. Verify that the analog output is at 4 ± 0.25 mA.
• If the analog output is now within range, troubleshooting is complete.
• If the analog output is still out of range, see Signal,
or Frequent service.
7. If you cannot resolve the issue, contact the supplier.
Frequent service list possible issues and
or Modbus interface and see the
® ®
Signal
Manual
MS-00809-0100-3625
through Frequent
Gas reading during test,
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