What causes HW FAN (W11) error on my Delta RPI M30A Inverter?
- LlserranoAug 31, 2025
If your Delta Inverter displays 'HW FAN (W11)', it could be due to one or more locked, defective, or disconnected fans, or a detection circuit malfunction. To fix this: 1. Remove any objects stuck in the fan(s). 2. Replace any defective fan(s). 3. Check the connections of all fans. 4. Check the detection circuit inside the inverter.