Error code
E: 51 Indoor unit fan motor error
Applies to 6 models
ASUG09LZAS, ASUG12LZAS, ASUG15LZAS, AOUG09LZAH1, AOUG12LZAH1, AOUG15LZAH1
What this means
Indoor fan speed remains below one-third of its target for more than 56 seconds. Causes include fan blockage, bearing or rotation failure, an open motor winding, overheating protection, control-PCB failure, or fan-motor failure.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.