Diagnostics and troubleshooting Prosonic S FMU90 PROFIBUS DP
84 Endress+Hauser
• A 00 250
Faulty external temperature sensor
→ Check temperature sensor.
• A 0x 281
Temperature readings sensor 01 or 02 defect - check connection
→ Check that the sensor is connected correctly.
• W 0x 501
No sensor selected for input 01 or 02
→ Select sensor (Level or Flow menu).
• A 0x 502
Sensor 01 or 02 not recognized
→ Enter sensor type manually (Level or Flow menu, Basic setup submenu).
• A 00 511
No factory calibration available
• A 0x 512
Recording of mapping
→ Wait for the mapping to finish.
• W 01 521
New sensor 01 or 02 recognized
• W 01 601
Linearization curve steps incorrect level 01 or 02
→ Enter linearization again (Level menu).
• W 0x 602/603
Linearization curve steps incorrect flow 01 or 02
→ Enter linearization again (Flow menu).
• A 0x 604
Calibration level 01 or 02 failure
→ Correct calibration (Level menu).
• A 0x 605/606
Calibration flow 01 or 02 failure
→ Correct calibration (Flow menu).
• W 0x 611
Less than 2 linearization points for level 01 or 02
→ Enter additional linearization points (Level menu).
• W 0x 612/613
Less than 2 linearization points for flow 01 or 02
→ Enter additional linearization points (Flow menu).
• W 0x 620
Pulse value too small relay 01 - 06
→ Check counting unit (Flow menu, Flow counter submenu).
• E 0x 641
No usable echo sensor 01 or 02
→ Check basic setup for the sensor (Level or Flow menu).
• A 0x 651
Level in safety distance sensor 01 or 02 risk overfill
The error disappears as soon as the level is no longer in the safety distance.
→ If necessary, activate the Reset self holding function (Safety settings menu).
• E 0x 661
Sensor 01 or 02 temperature too high (max. temp. exceeded at sensor)
• W 0x 682
Current 01 or 02 out of range
• → Perform basic setup.
• → Check linearization.
• W 0x 691
Noise filling detected sensor 01 or 02
• W 00 692
Backwater detected (with active backwater detection)
• W 00 693
Dirt detected (with active dirt detection)
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