CodeRegistry
Brands
  1. Home
  2. Fujitsu
  3. Air Conditioners
  4. Poor cooling - Direct sunlight
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Poor cooling - Direct sunlight

Poor cooling performance — Direct sunlight in the room

Fujitsu · Air Conditioners

What does Poor cooling - Direct sunlight mean?

In cooling mode, strong direct sunlight entering the room can significantly increase the heat load, making it harder for the air conditioner to cool the space effectively.

Common Causes

  • High solar heat gain entering the room through windows or openings.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Close curtains, blinds, or shades to block direct sunlight from entering the room.

  2. 2

    Consider using thicker or blackout curtains for better insulation against heat.

  3. 3

    Ensure all windows are properly closed to prevent additional heat entry.

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