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Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS09NA*** 3 blinks / restartDischarge-temperature overheat protection→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS09NA*** 6 blinksIndoor-outdoor serial-signal failure→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS09NAH*** 1 blinkOutdoor power-system abnormality→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS12NA*** 8 blinks / restartCompressor synchronous abnormality→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS18NAH*** 12 blinks / restartCompressor phase-current detection failure→ Troubleshooting · Trane / Mitsubishi ElectricTrane / Mitsubishi Electric MUZ-FS09NA*** 4 blinks / restartFin or control-board temperature overheat protection→ Troubleshooting · Trane / Mitsubishi ElectricTrane / Mitsubishi Electric MUZ-FS15NAH*** 3 blinks / restartDischarge-temperature overheat protection→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS18NA*** 2 blinksOutdoor thermistor short or open circuit→ Troubleshooting · Trane / Mitsubishi ElectricTrane / Mitsubishi Electric MUZ-FS12NA*** 10 blinks / restartOutdoor fan motor failure→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS06NA*** 8 blinks / restartCompressor synchronous abnormality→ Troubleshooting · Mitsubishi ElectricMitsubishi Electric MUZ-FS15NAH*** 5 blinks / restartHigh-pressure protection→ Troubleshooting · Trane / Mitsubishi ElectricTrane / Mitsubishi Electric MSZ-FS09NA*** 7 blinksOutdoor control-system failure→