ISC-027BW red led

Hallo, I hope I get help here.
I bought the ISC-027BC
Now I started the App and at first the red led is on and the blue one flash
The manuel users say I must push the bottem till 8 seconds, but it doesnt work
What mesns the red led?

Thanks a lot

The red indicator is a status indicator for the fan, it is normal to display a red indicator if the fan is not operating.
Please connect ISC-027BW to the INKBIRD app first, you can check the WIFI connection status by the blue WIFI indicator.
After connecting, please insert the probes into ISC-027BW and set the target temperature. If the fan is on, the red indicator light will change to green indicator light.