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ABB Error 37108 — Communication lost with unit

Error

ABB 37108 (“Communication lost with unit”): The controller lost contact with an internal unit. Likely part: DSQC 662 (System power / distribution board) +1 more.

Updated 2026-09-17 · LogrobotLM reference

What it means

The controller lost contact with an internal unit. In the field this is regularly seen TOGETHER with 38101 (SMB link) — one physical link failure, two symptoms.

What to check

  • Note which unit is cited, then inspect its cable path and connectors.
  • If paired with 38101: focus on the serial measurement link (SMB side).
  • Flexing cable segments on moving axes are the usual wear point.

Part to check / replace

ABB 37108 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

38101SMB communication failure20032Revolution counter not updated

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →