OK if that tripped and it’s 100amp I see, then it’s quite likely it’s an earth fault.
- Heating element failed
- short to earth
Open machine…while unplugged check wires that nothings come of, melted, abraded and shorted to the case or a boiler. Check there isn’t water spraying/leaking causing a short to earth.
Disconnect the heating element, keep heating element wires away from the boiler case, so they don’t short….and turn machine on. Make the pump run…If it doesn’t trip anything, then it’s almost certainly a heating element failure.,