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POWER lamp 4-time blink (recall)

Indoor POWER lamp blinks 4 times (in recall mode) — Air Purifying power voltage drop

Mitsubishi Electric · MSZ-AY Air Conditioners

What does POWER lamp 4-time blink (recall) mean?

In AIR PURIFYING power failure mode recall function, if the indoor POWER lamp blinks four times, it indicates an issue where the voltage between CN1T1 (+) and (GND) on the electronic P.C. board falls significantly (0.4V / 0.5ms).

Common Causes

  • Significant voltage drop in the AIR PURIFYING power circuit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Release the failure mode recall function by cycling power to the unit or pressing the remote controller's RESET button.

  2. 2

    Ensure the front panel is securely closed.

  3. 3

    If the problem persists, contact a service technician to check the AIR PURIFYING power voltage.

Browse all codes in this manual (43)
Verified technical data. Last updated: April 2026

Related Faults

AIR PURIFYING lamp 2 blinksAIR PURIFYING lamp blinks 2 times — Front panel not firmly closed or interlock switch issueAIR PURIFYING lamp 2-time blinkAIR PURIFYING lamp blinks 2 times — Air Purifying device error (real-time)AIR PURIFYING lamp continuous blinkAIR PURIFYING lamp continuously blinks — Air purifying device dirty, wet, or malfunction
Source: Mitsubishi Electric MSZ-AY Air Conditioners
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