LED
Error Contents
1 flash
Communication error (indoor unit to Outdoor unit)
2 flashes
Discharge pipe temperature sensor
3 flashes
Outdoor heat exchanger temperature sensor
4 flashes
Outdoor temperature sensor
7 flashes
Compressor temperature sensor
8 flashes
Heat sink temperature sensor
9 flashes
Pressure switch abnormal
12 flashes
IPM error
13 flashes
Compressor rotor position cannot detect
14 flashes
Compressor cannot operate/Start up error
15 flashes
Outdoor fan abnormal (upper fan)
16 flashes
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 flashes
Continuous blink
OFF
Indoor room temperature sensor open
2 flashes
Continuous blink
Continuous blink
Indoor room temperature sensor short circuited
3 flashes
Continuous blink
OFF
Indoor heat exchanger temperature sensor open
3 flashes
Continuous blink
Continuous blink
Indoor heat exchanger temperature sensor short circuited
4 flashes
Continuous blink
OFF
Float switch operated
5 flashes
Continuous blink
OFF
Communication error (serial reverse transfer error)
5 flashes
Continuous blink
Continuous blink
Outdoor communication error (forward reverse transfer error)
6 flashes
Continuous blink
OFF
Indoor fan abnormal
Continuous blink
2 flashes
OFF
Outdoor power source connection abnormal
Continuous blink
3 flashes
OFF
Outdoor heat exchanger temperature sensor open
Continuous blink
3 flashes
Continuous blink
Outdoor heat exchanger temperature sensor short circuited
Continuous blink
4 flashes
OFF
Outdoor temperature sensor open
Continuous blink
4 flashes
Continuous blink
Outdoor temperature sensor short circuited
Continuous blink
5 flashes
OFF
Outdoor discharge pipe temperature sensor or Compressor temperature sensor open
Continuous blink
5 flashes
Continuous blink
Outdoor discharge pipe temperature sensor or Compressor temperature sensor short circuited
Continuous blink
6 flashes
OFF
Outdoor high pressure abnormal
Continuous blink
7 flashes
OFF
Outdoor discharge pipe temperature or Compressor temperature sensor abnormal
Continuous blink
8 flashes
OFF
Compressor temperature thermistor error
Continuous blink
9 flashes
OFF
Pressure switch error
Continuous blink
10 flashes
OFF
IPM error
Continuous blink
11 flashes
OFF
CT error
Continuous blink
12 flashes
OFF
Active Filter Module error (AFM)
Continuous blink
13 flashes
OFF
Compressor rotor location cannot be detected (Permanent stop)
Continuous blink
14 flashes
OFF
Outdoor unit fan motor error
Outdoor Cassette & Ceiling Suspended : AOU18RLX, AOU24RLX, AOU36RLX, AOU42RLX
