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1-time blink every 2.5 seconds

1-time blink every 2.5 seconds — Outdoor unit overcurrent protection

Mitsubishi Electric · Air Conditioners

What does 1-time blink every 2.5 seconds mean?

The outdoor unit's overcurrent protection has activated three times within one minute after the compressor started. The outdoor unit LED blinks once with a 2.5-second pause.

Common Causes

  • Outdoor power system overcurrent protection cut-out
  • Compressor connector issues
  • Closed stop valve

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner's power at the circuit breaker.

  2. 2

    Carefully reconnect the compressor's connector to ensure it is secure.

  3. 3

    Verify that the stop valve is fully open.

  4. 4

    Restore power and attempt to operate the unit. If the problem persists, contact a qualified technician.

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)10-time blink 2.5 seconds OFF10-time blink 2.5 seconds OFF — Outdoor fan motor fault
Source: Mitsubishi Electric Air Conditioners
Open Manual (Page 47)Search more codes in this manual