I am working on a CAT NOR30 SN: 2ML-02611. When you turn the key on, we get the message "Lift emergency switch turn key off/on code 83". We have since replaced the emergency switch but the problem is still there. I am trying to figure out what our next options are. I have heard that the code is a vague one, not really specific to try and narrow the search for issues. Any help would be appreciated.