Diagnostics and troubleshooting Proline t-mass I 300 HART
138 Endress+Hauser
LED Color Meaning
2 Device status (normal
operation)
Off Firmware error
Green Device status is ok.
Flashing green Device is not configured.
Red A diagnostic event with "Alarm" diagnostic behavior
has occurred.
Flashing red A diagnostic event with "Warning" diagnostic
behavior has occurred.
Flashing red/green The device restarts.
2 Device status (during
start-up)
Flashes red slowly If > 30 seconds: problem with the boot loader.
Flashes red quickly If > 30 seconds: compatibility problem when
reading the firmware.
3 Not used – –
4 Communication Off Communication not active.
White Communication active.
5 Service interface (CDI) Off Not connected or no connection established.
Yellow Connected and connection established.
Flashing yellow Service interface active.
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