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POWER lamp 7-time flash

POWER lamp flashes 7 times — Outdoor control system data read error

Mitsubishi Electric · MSZ-FH Air Conditioners

What does POWER lamp 7-time flash mean?

The indoor fan motor turns OFF. This indicates that the system cannot properly read data from the nonvolatile memory of either the inverter P.C. board or the outdoor electronic control P.C. board.

Common Causes

  • Problem with the nonvolatile memory on the inverter P.C. board.
  • Problem with the nonvolatile memory on the outdoor electronic control P.C. board.
  • Defective inverter P.C. board or outdoor electronic control P.C. board.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn OFF the main power supply to the air conditioner, wait 30 seconds, then turn it back ON.

  2. 2

    Attempt to restart the unit using the remote controller.

  3. 3

    Ensure the outdoor unit has proper ventilation and is free of obstructions.

  4. 4

    If the error persists, contact a qualified service technician for inspection of the outdoor unit's control boards.

  5. 5

    Refer to the outdoor unit service manual for additional troubleshooting steps for the outdoor control system.

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Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MSZ-FH Air Conditioners
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