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Left lamp blinks 3-time 2.5-second OFF

Left lamp blinks 3-time 2.5-second OFF — Indoor fan motor rotational frequency feedback signal not emitted

Mitsubishi Electric · Air Conditioning

What does Left lamp blinks 3-time 2.5-second OFF mean?

The left lamp of the OPERATION INDICATOR blinks three times, followed by a 2.5-second pause. This indicates that the rotational frequency feedback signal was not emitted during the indoor fan operation.

Common Causes

  • Failure of the indoor fan motor.
  • Issue with the feedback signal mechanism.
  • Disconnection in the indoor fan motor's wiring.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn OFF the power supply to the unit.

  2. 2

    Refer to Section 9-6, 'Check of indoor fan motor,' for specific troubleshooting instructions.

  3. 3

    Contact a qualified technician if the issue persists after basic checks.

Browse all codes in this manual (170)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric Air Conditioning
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