105

Oil aging / ready signal Display error

SEW Eurodrive · MCBSM

What does 105 mean?

The oil aging sensor is not ready for operation, meaning it's unable to provide valid status information regarding oil condition. This could be due to a power supply issue or a malfunction within the sensor itself, leaving the system unprotected from oil-related issues.

Common Causes

  • Loss of power supply to the oil aging sensor (e.g., broken wire to 24VDC terminal or blown fuse).
  • Internal malfunction or failure of the oil aging sensor unit itself, preventing initialization.
  • Incorrect wiring or loose connections between the sensor and the drive/control system (e.g., communication wires to terminal X12).
  • Sensor not properly initialized or enabled in the drive's parameter settings (e.g., P3-10 for sensor type set to 'Disabled').
  • Environmental conditions (e.g., extreme temperature outside sensor operating range -20°C to 80°C) preventing proper startup.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Measure the supply voltage at the oil aging sensor's power input terminals (e.g., expect 24VDC ± 10% between positive and negative terminals).

  2. 2

    2. Inspect all wiring connections between the oil aging sensor and the drive/control module for looseness, damage, or corrosion.

  3. 3

    3. Verify sensor enable parameters in the drive (e.g., P3-10 set to 'Oil aging sensor DUV' and not 'Disabled').

  4. 4

    4. If the sensor has local diagnostics (e.g., an LED indicator), observe its status for error codes or initialization state (e.g., solid green for ready).

  5. 5

    5. Temporarily replace the oil aging sensor with a known good unit to determine if the sensor itself is faulty.

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Verified technical data. Last updated: March 2026

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