LED Error Contents
1 ash Communication error (indoor unit to Outdoor unit)
2 ashes Discharge pipe temperature sensor
3 ashes Outdoor heat exchanger temperature sensor
4 ashes Outdoor temperature sensor
7 ashes Compressor temperature sensor
8 ashes Heat sink temperature sensor
9 ashes Pressure switch abnormal
12 ashes IPM error
13 ashes Compressor rotor position cannot detect
14 ashes Compressor cannot operate/Start up error
15 ashes Outdoor fan abnormal (upper fan)
16 ashes Outdoor fan abnormal (lower fan)
Lighting No error
Universal Mount / Ceiling Suspended: ABU18RULX, ABU24RULX, ABU36RSLX
Operation Timer Swing Error Contents
Continuous blink Continuous blink OFF Indoor EEPROM abnormal
Continuous blink Continuous blink Continuous blink Outdoor EEPROM abnormal
2 ashes Continuous blink OFF Indoor room temperature sensor open
2 ashes Continuous blink Continuous blink Indoor room temperature sensor short circuited
3 ashes Continuous blink OFF Indoor heat exchanger temperature sensor open
3 ashes Continuous blink Continuous blink Indoor heat exchanger temperature sensor short circuited
4 ashes Continuous blink OFF Float switch operated
5 ashes Continuous blink OFF Communication error (serial reverse transfer error)
5 ashes Continuous blink Continuous blink Outdoor communication error (forward reverse transfer error)
6 ashes Continuous blink OFF Indoor fan abnormal
Continuous blink 2 ashes OFF Outdoor power source connection abnormal
Continuous blink 3 ashes OFF Outdoor heat exchanger temperature sensor open
Continuous blink 3 ashes Continuous blink Outdoor heat exchanger temperature sensor short circuited
Continuous blink 4 ashes OFF Outdoor temperature sensor open
Continuous blink 4 ashes Continuous blink Outdoor temperature sensor short circuited
Continuous blink 5 ashes OFF Outdoor discharge pipe temperature sensor or Compressor temperature sensor open
Continuous blink 5 ashes Continuous blink Outdoor discharge pipe temperature sensor or Compressor temperature sensor short circuited
Continuous blink 6 ashes OFF Outdoor high pressure abnormal
Continuous blink 7 ashes OFF Outdoor discharge pipe temperature or Compressor temperature sensor abnormal
Continuous blink 8 ashes OFF Compressor temperature thermistor error
Continuous blink 9 ashes OFF Pressure switch error
Continuous blink 10 ashes OFF IPM error
Continuous blink 11 ashes OFF CT error
Continuous blink 12 ashes OFF Active Filter Module error (AFM)
Continuous blink 13 ashes OFF Compressor rotor location cannot be detected (Permanent stop)
Continuous blink 14 ashes OFF Outdoor unit fan motor error
Outdoor Cassette & Ceiling Suspended : AOU18RLX, AOU24RLX, AOU36RLX, AOU42RLX
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