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Indoor unit 11-time blink / Outdoor unit 8-time blink

Indoor unit 11-time blink, Outdoor unit 8-time blink — Bus-bar voltage (DC) abnormality (Recall Function)

Mitsubishi Electric · Air Conditioners

What does Indoor unit 11-time blink / Outdoor unit 8-time blink mean?

The indoor unit's upper lamp blinks 11 times and the outdoor P.C. board LED blinks 8 times. This indicates that the bus-bar voltage of the inverter cannot be detected normally.

Common Causes

  • Bus-bar voltage of inverter cannot be detected normally
  • Inverter/compressor malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check for any recent power fluctuations or outages in your area.

  2. 2

    Power cycle the air conditioner by turning off the main circuit breaker for 30 seconds, then turning it back on.

  3. 3

    If the problem persists, a qualified technician should check the inverter/compressor.

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