My Longer B1 does not homing

Hello everyone, I have a 40W Longer B1 laser. I activated Hard Limit and Homing Cycle from the settings, but when I press HOME, the laser makes a very small movement and gives me this error:

ALARM:8

Homing fail. Cycle failed to clear limit switch when pulling off. Try increasing pull-off setting or check wiring.

Also, the air pump does not turn on, despite the fact that it is all active, and in the console, if I put M7 or M8 nothing happens.

Thank you!

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