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ABB Error 38600 — DC link / Rectifier / Power wiring fault

Error

ABB 38600 (“DC link / Rectifier / Power wiring fault”): DC link input voltage too low; loss of a phase or fault in the rectifier/DC link chain. Likely part: DC-Link / Redresseur / Câblage puissance (DC-link / rectifier / Câblage puissance).

Updated 2026-10-22 · LogrobotLM reference

What it means

DC link input voltage too low; loss of a phase or fault in the rectifier/DC link chain. Incorrect insertion of the DC busbar or the bleeder resistor wiring can also cause the event.

What to check

  • LOTO before any work.
  • Check the rectifier three-phase supply, fuses, contactors, DC busbar insertion and bleeder resistor wiring.
  • If the upstream supplies are correct, isolate the rectifier and wiring.
  • Note: Functional equivalent of the IRC5 DC link undervoltage faults; historically an S4C+ code.

Part to check / replace

ABB 38600 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

34100Drive system fault34200Axis Computer / Drive Units fault34201Drive Unit fault

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 →