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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

FF89

MOD CHOKE T

ABB · ACS800 Standard Firmware

What does FF89 mean?

An overtemperature condition has been detected in the choke of a liquid-cooled R8i inverter module. This indicates that the choke's temperature has surpassed its safe operating threshold.

Common Causes

  • Over-temperature condition detected on a choke or filtering component.
  • Excessive current flowing through the choke.
  • Choke saturation or damage.
  • Poor ventilation around the choke.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the inverter cooling fan for proper operation, obstructions, or unusual noises.

  2. 2

    Measure the ambient temperature around the inverter module and verify it is within the specified operating range.

  3. 3

    Check the liquid cooling system for adequate flow, pressure, and coolant level to ensure effective heat removal.

Browse all codes in this manual (33)
Verified technical data. Last updated: April 2026

Related Faults

2211Current Measurement Failure2330Earth Fault / Current Unbalance3210DC OVERVOLT
Source: ABB ACS800 Standard Firmware
Open Manual (Page 244)Search more codes in this manual