#Person1#: Why have you stopped production?
#Person2#: We've had a few problems. One of the bolts has worked loose and a blade has snapped off.
#Person1#: OK. Make sure the power is switched off then tighten up all the bolts on the unit and replace the broken blade. Why is there oil all over the floor?
#Person2#: I think the valve is faulty. I couldn't regulate the pressure and the seal burst. I tried opening the emergency valve but it was jammed.
#Person1#: Clean up the mess first, then fit a new seal and check the valve.
#Person2# tells #Person1# the reason why the production stopped and there's oil over the floor. #Person1# asks #Person2# how to deal with it.
explain reasons