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Left lamp blinks 14-time or more 2.5-second OFF

Left lamp blinks 14-time or more 2.5-second OFF — Other abnormality detected in outdoor unit

Mitsubishi Electric · Air Conditioning

What does Left lamp blinks 14-time or more 2.5-second OFF mean?

The left lamp of the OPERATION INDICATOR blinks fourteen times or more, followed by a 2.5-second pause. This signifies an abnormality in the outdoor unit not covered by other specific codes.

Common Causes

  • Problem with the stop valve.
  • Problem with the 4-way valve.
  • Other unspecified outdoor unit abnormality.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn OFF the power supply to the unit.

  2. 2

    Check the stop valve and the 4-way valve for any obvious issues.

  3. 3

    Use the failure mode recall function for the outdoor unit (refer to outdoor unit service manual) to check the abnormality in more detail.

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