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ABB Error 37001 — Motor ON contactor activation error

Error

ABB 37001 (“Motor ON contactor activation error”): The run-chain contactor did not close (or open) as ordered. Likely part: Contacteurs K42 / K43 / Run chain (contactor K42 / K43 / Run chain).

Updated 2026-09-17 · LogrobotLM reference

What it means

The run-chain contactor did not close (or open) as ordered. The drive power stage cannot be enabled safely.

What to check

  • Check contactor coil supply and feedback contacts (K42/K43-type run chain).
  • Inspect the run chain: e-stop devices, guard relays, connectors.
  • A worn contactor with pitted contacts gives intermittent activation errors.

Part to check / replace

ABB 37001 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

20011Emergency stop chain conflict10014System failure state (SYSFAIL)

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 →