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10-time blink 2.5 seconds OFF

10-time blink 2.5 seconds OFF — Outdoor fan motor fault

Mitsubishi Electric · Air Conditioners

What does 10-time blink 2.5 seconds OFF mean?

The outdoor unit LED blinks 10 times with a 2.5-second pause. This indicates that the outdoor fan has stopped three times consecutively within 30 seconds of starting.

Common Causes

  • Outdoor fan motor malfunction
  • Blown fuse (F901) on the inverter P.C. board
  • Poor connection of outdoor fan motor connectors (CN931, CN932)
  • Defective inverter P.C. board

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power to the air conditioner at the circuit breaker.

  2. 2

    Check for any physical obstructions that might be preventing the outdoor fan from spinning freely.

  3. 3

    Ensure the connectors for the outdoor fan motor (CN931, CN932) are securely connected.

  4. 4

    If the fan still does not operate correctly, a technician should inspect the outdoor fan motor and inverter P.C. board.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

1-time blink (recall mode)Outdoor Unit Recall: 1-time blink - Indoor/outdoor communication, receiving error1-time blink 2.5 seconds OFF (Outdoor unit operates)1-time blink 2.5 seconds OFF — Frequency drop by current protection (Outdoor unit operates)1-time blink every 2.5 seconds1-time blink every 2.5 seconds — Outdoor unit overcurrent protection
Source: Mitsubishi Electric Air Conditioners
Open Manual (Page 47)Search more codes in this manual