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Upper lamp blinks 14 times or more

Upper lamp blinks 14 times or more — Other Abnormality Detected

Mitsubishi Electric · MSZ-AP Air Conditioners

What does Upper lamp blinks 14 times or more mean?

The indoor unit's upper lamp blinks 14 or more times, indicating that an abnormality other than the commonly listed issues has been detected by the system. Further investigation is required to pinpoint the exact cause.

Common Causes

  • Unspecified system abnormality
  • Outdoor unit stop valve is not fully open
  • Issue with the 4-way valve (refrigerant flow direction control)

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure all outdoor unit stop valves are fully open.

  2. 2

    Turn off the air conditioner at the main power supply breaker.

  3. 3

    Wait for at least 5 minutes before turning the main power supply back on.

  4. 4

    To get more specific information, activate the 'Failure Mode Recall Function' (refer to page 30 for instructions) to view detailed outdoor unit abnormality history.

  5. 5

    If the problem continues, contact a qualified service technician for diagnosis.

Browse all codes in this manual (87)
Verified technical data. Last updated: April 2026

Related Faults

3 Min Restart DelayUnit cannot be operated for about 3 minutes after restart - Microprocessor protection3 Short Beeps3 short beeps from indoor unit - Weekly timer setting failedAP Mode activatedNET and MODE LEDs flashing (every 5 seconds) - Access Point Mode activated
Source: Mitsubishi Electric MSZ-AP Air Conditioners
Open Manual (Page 34)Search more codes in this manual