Blink count: 1
Operation lamp flashes 1 time repeatedly while timer lamp remains off
Typical causes
- EEPROM parameter corruption
- Indoor control memory fault
- PCB data-read error
Midea Aircon Blinking Light Patterns
Use this Midea blink table to match patterns and narrow next checks before booking.
Before you use this tool
This is a blink-pattern guidance table, not a model-exact diagnosis. Pattern meaning can vary by controller and series. If your controller shows a direct code (for example `CH21`, `U4`, `E6`), use the error-code guide for a faster match.
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.
Midea blink guide
Includes common SG residential blinking-light patterns with what they usually indicate and typical causes. Not every blink pattern maps to an error code.
Blink count: 2
Operation lamp flashes 2 times repeatedly while timer lamp remains off
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- 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
Typical causes
- Compressor fault
- Overheating/protection trigger
- Electrical or wiring fault
Blink count: Persistent or continuous
Yellow/orange lamp blinks repeatedly as maintenance or drainage alert
Typical causes
- Blocked drainpipe
- Indoor water leakage path issue
- Sensor malfunction
Not sure how to read your Midea blink pattern?
Send a short blink video and your model sticker. We'll advise the next step before any work is recommended.
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