Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Remove outer case
Remove the two outer nuts securing the outer case front, then lift up and unhook the case at the top from the threaded lugs, pull it off on one side to release, then remove.
Remove inner case front
Remove the inner case front, secured by two clamps at the bottom, lift up and unhook at the top.