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Indoor unit indicator blinks (timer fault)

Indoor unit indicator blinks after power resumption — Timer fault

Fujitsu · Air Conditioners

What does Indoor unit indicator blinks (timer fault) mean?

After a power interruption, the air conditioner restarts automatically. If a timer was set, its countdown will be reset, and the indoor unit indicator blinks to notify you of this timer fault.

Common Causes

  • Power interruption (blackout) occurred while the timer was actively set.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if a power outage occurred.

  2. 2

    Reset the clock settings on the remote controller.

  3. 3

    Reset any desired timer settings on the remote controller.

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 11)Search more codes in this manual