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Indoor unit 9-time blink / Outdoor unit 9-time blink

Indoor unit 9-time blink, Outdoor unit 9-time blink — Compressor phase current abnormality (Recall Function)

Mitsubishi Electric · Air Conditioners

What does Indoor unit 9-time blink / Outdoor unit 9-time blink mean?

The indoor unit's upper lamp blinks 9 times and the outdoor P.C. board LED blinks 9 times. This indicates that each phase current of the compressor cannot be detected normally.

Common Causes

  • Compressor phase current detection failure
  • Inverter/compressor malfunction

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

    Reconnect the compressor's connector to ensure a proper connection.

  3. 3

    Restore power and attempt to run the unit.

  4. 4

    If the error continues, a qualified technician should check the inverter/compressor system.

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 46)Search more codes in this manual