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Left lamp blinks 5-time 2.5-second OFF

Left lamp blinks 5-time 2.5-second OFF — Outdoor power system abnormality

Mitsubishi Electric · Air Conditioning

What does Left lamp blinks 5-time 2.5-second OFF mean?

The left lamp of the OPERATION INDICATOR blinks five times, followed by a 2.5-second pause. This means the compressor stopped three consecutive times within one minute after startup due to overcurrent protection or startup failure protection.

Common Causes

  • Overcurrent in the compressor circuit.
  • Failure of the compressor to start properly.
  • Issue with the outdoor power system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn OFF the power supply to the unit.

  2. 2

    Refer to 'How to check of inverter/compressor' (in the outdoor unit service manual).

  3. 3

    Check the stop valve of the outdoor unit.

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

Related Faults

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 24)Search more codes in this manual