Blink count: 1
Operation lamp flashes 1 time repeatedly while timer lamp remains off
EEPROM parameter corruption · Indoor control memory fault · PCB data-read error
Midea Aircon Blinking Light Patterns
Learn what common Midea blink patterns mean, what typically causes them, and whether they need urgent attention.
Midea blink guide
This is a guidance table, not a model-exact diagnosis. Pattern meaning can vary by controller and series. Use this page to narrow next steps, then verify with model sticker details.
Safety Warning
Stop using the unit and contact a technician if the breaker trips repeatedly, you smell burning, see sparks, hear loud electrical buzzing, or water is leaking from places it normally should not.
Blink count: 2
Operation lamp flashes 2 times repeatedly while timer lamp remains off
Indoor-outdoor communication loss · Interconnection wiring issue · Indoor or outdoor PCB communication fault
Blink count: 5
Operation lamp flashes 5 times repeatedly while timer lamp remains off
T1 sensor open/short · Sensor wiring/connector fault · Indoor PCB sensor-input issue
Blink count: 6
Operation lamp flashes 6 times repeatedly while timer lamp remains off
T2 sensor open/short · Sensor harness fault · Indoor control-board input fault
Blink count: 8
Outdoor module LED5 stays ON while LED4 flashes 8 times, pauses ~1 second, then repeats
Inverter module protection trigger · Outdoor power-stage stress · Drive module abnormality
Blink count: 9
Outdoor module LED5 stays ON while LED4 flashes 9 times, pauses ~1 second, then repeats
DC bus low-voltage event · Power supply instability · Outdoor drive/power circuit fault
Blink count: 10
Outdoor module LED5 stays ON while LED4 flashes 10 times, pauses ~1 second, then repeats
DC bus over-voltage event · Power surge condition · Outdoor power-stage abnormality
Blink count: 12
Outdoor module LED5 stays ON while LED4 flashes 12 times, pauses ~1 second, then repeats
Inverter control error (MCE) · Drive command/frequency mismatch · Outdoor module control fault
Blink count: Persistent or continuous
Green lamp blinks repeatedly for minor airflow/efficiency alerts
Dirty air filters · Temporary indoor-outdoor communication glitch · Reduced cooling efficiency state
Blink count: Persistent or continuous
Red lamp blinks repeatedly as serious system warning
Compressor fault · Overheating/protection trigger · Electrical or wiring fault
Blink count: Persistent or continuous
Yellow/orange lamp blinks repeatedly as maintenance or drainage alert
Blocked drainpipe · Indoor water leakage path issue · Sensor malfunction
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