Pixhawk 3 pro not arming problems

Hi everyone,

Yesterday I installed a Pixhawk3 and after an initial configuration, I am going to arm engines and it gives me the following mistakes:

“NOT ARMING: Press safety switch first”
“NOT ARMING: Connect power module.”
“NOT ARMING: Preflight checks failed.”

I have no safety switch…, the power module is correctly installed and connected to Power 1.

Any idea?

Thank you


Have you upgraded to V1.6.5 release?

To disable the safety switch you can use the circuit breaker for IO_SAFETY as shown below (enter 22027 and reboot) :