Always make sure batteries have been installed on the remote.

With NO house power connection, the only power source is solar.  There are a few ways to optimize solar capture, which directly affects the Solar Controller operation, and how fast the fan runs:

1. Tilt and Rotate the Solar Panel or Fan Shroud to capture the maximum sunlight.  The best location is to have the panel faces south
2. Ensure all leads are securely connected
3. If problem persists, please call U.S. Sunlight Corporation

With house power connection, house power is the secondary power source.

1. Go thru step 1, 2, and 3 to ensure solar capture is maximized
2. Make sure the power adapter is securely connected to the Solar Controller
3. If problem persists, please call U.S. Sunlight Corporation