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Upper lamp blinks 3 times

Upper lamp blinks 3 times — Indoor Fan Motor Error

Mitsubishi Electric · MSZ-AP Air Conditioners

What does Upper lamp blinks 3 times mean?

The indoor unit's upper lamp blinks three times, indicating a problem with the indoor fan motor. The system is not receiving the rotational frequency feedback signal during the fan's operation.

Common Causes

  • Indoor fan motor malfunction
  • Obstruction preventing the indoor fan from rotating freely
  • Faulty feedback signal from the indoor fan motor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the main power supply breaker.

  2. 2

    Carefully open the indoor unit's front panel and check if the indoor fan is visibly obstructed by any foreign objects.

  3. 3

    Remove any obstructions if it is safe to do so and the power is off.

  4. 4

    Ensure the fan blades can spin freely by hand (when power is off).

  5. 5

    Close the panel, wait 30 seconds, then turn the main power supply back on.

Browse all codes in this manual (87)
Verified technical data. Last updated: April 2026

Related Faults

3 Min Restart DelayUnit cannot be operated for about 3 minutes after restart - Microprocessor protection3 Short Beeps3 short beeps from indoor unit - Weekly timer setting failedAP Mode activatedNET and MODE LEDs flashing (every 5 seconds) - Access Point Mode activated
Source: Mitsubishi Electric MSZ-AP Air Conditioners
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