The first step is to turn off the air conditioner's circuit breaker from the main panel. Just to be on the safe side check whether there is current by using a non-contact power tester. Now get hold of the manufacturers’ manual and locate the capacitors in the component diagram provided within. Remember every manufacturer places the capacitors in a position appropriate to their design; these positions are unique.
Use a screw driver, and open the side panel of the air conditioning unit; place it to one side. Now locate the capacitor inside the panel. Do not touch anything as there can be some exposed wires and connectors.
Now hold the screw driver from its insulated handle, making sure that your hand is not even close to the metallic part. Now touch this metallic part on the protrusions comings out of the capacitor. This short circuits the capacitor and releases all the energy which is stored within, thus ruling out the possibility of electrocution while working in the internal compartment. If there is more than one capacitor, repeat the same procedure.