Taken from ATUHM user manual:

[Unit Malfunction—Manual Operation Mode]
In the event of unit malfunction during manual operation, immediately activate the ISF (Instant Shutdown Failsafe) switch located directly above the operator’s control board. The ISF will terminate all base functions and the ATUHM will cease movement within 3 seconds. Manufacturer restart will be required following this procedure.

Danger Zone One. Story by Midnight. Art by Tanabata Usagi.