locking might not even be necessary, just power off the device if pressure of refrigerant drop. Having some way to ventilate the gas (so you don't just get "a

locking might not even be necessary, just power off the device if pressure of refrigerant drop. Having some way to ventilate the gas (so you don't just get "a box full of flammable gas" situation on slow leak) without reducing performance too much might help also