Error code
E: A1 Outdoor discharge temperature error
Applies to 6 models
ASUG09LZAS, ASUG12LZAS, ASUG15LZAS, AOUG09LZAH1, AOUG12LZAH1, AOUG15LZAH1
What this means
The compressor was stopped because discharge temperature reached at least 230 °F (110 °C) twice within 24 hours. Possible causes include a closed 3-way valve, defective EEV, strainer blockage, outdoor airflow problems, thermistor failure, insufficient refrigerant, or PCB 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.