Multi-Zone Outdoor Units
AOU18RLXFZ, AOU18RLXFZH, AOU24RLXFZ, AOU24RLXFZH, AOU36RLXFZ, AOU36RLXFZ1, AOU24RML, AOU24RML1, AOU36RML, AOU36RML1
Error Contents LED
1 2 3 4
Outdoor communication signal error (forward transfer)
1 ash Off Off Off
Off 1 ash Off Off
Off Off 1 ash Off
Off Off Off 1 ash
Outdoor discharge pipe thermistor error 2 ashes Off Off Off
Heat Ex. thermistor error 3 ashes Off Off Off
Outdoor temperature error 4 ashes Off Off Off
2-way valve thermistor error (for indoor unit A) 5 ashes Off Off Off
2-way valve thermistor error (for indoor unit B) Off 5 ashes Off Off
2-way valve thermistor error (for indoor unit C) Off Off 5 ashes Off
3-way valve thermistor error (for indoor unit A) 6 ashes Off Off Off
3-way valve thermistor error (for indoor unit B) Off 6 ashes Off Off
3-way valve thermistor error (for indoor unit C) Off Off 6 ashes Off
3-way valve thermistor error (for indoor unit D) Off Off Off 6 ashes
Compressor thermistor error 7 ashes Off Off Off
Heat sink thermistor error 8 ashes Off Off Off
High pressure switch 1 error 9 ashes Off Off Off
High pressure switch 2 error 10 ashes Off Off Off
Indoor unit capacity error 11 ashes Off Off Off
Over current error 12 ashes Off Off Off
Compressor control error 13 ashes Off Off Off
IPM error 14 ashes Off Off Off
Outdoor unit fan motor error 15 ashes Off Off Off
Heat Ex. MID thermistor error 16 ashes Off Off Off
Outdoor unit PCB microcomputer communication error 17 ashes Off Off Off
Discharge temp. error 18 ashes Off Off Off
Compressor temp. error 19 ashes Off Off Off
4-way valve error 20 ashes Off Off Off
Outdoor unit PCB model information error 21 ashes Off Off Off
Active lter error 22 ashes Off Off Off
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