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No operation - Timer active

Unit does not operate — Timer is active

Fujitsu · Air Conditioners

What does No operation - Timer active mean?

The unit may appear not to operate if an active timer setting is preventing it from starting or has scheduled it to be off.

Common Causes

  • The air conditioner's timer function is set to turn the unit off or delay its start.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the remote controller for any active timer settings.

  2. 2

    Deactivate the timer setting if it is preventing the desired operation.

  3. 3

    Refer to page 5 of the manual for instructions on how to check or deactivate timer settings.

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