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No operation - Fuse blown/Breaker tripped

Unit does not operate — Fuse blown or circuit breaker tripped

Fujitsu · Air Conditioners

What does No operation - Fuse blown/Breaker tripped mean?

The air conditioner will stop working if a fuse has blown or its circuit breaker has tripped due to an electrical overload or fault in the system.

Common Causes

  • A fuse has blown out for the air conditioner's electrical supply.
  • The circuit breaker for the air conditioner has tripped due to an electrical issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Locate the electrical panel and check the fuses or circuit breakers for the air conditioner.

  2. 2

    Replace any blown fuses or reset the tripped circuit breaker.

  3. 3

    If the fuse blows or the breaker trips again immediately after resetting, consult an authorized service personnel.

Browse all codes in this manual (118)
Verified technical data. Last updated: April 2026

Related Faults

11Error 11 — Serial communication error (Indoor unit not sending signal)12Error 12 — Wired Remote Controller Communication Error18Error 18 — External communication error
Source: Fujitsu Air Conditioners
Open Manual (Page 14)Search more codes in this manual