We have employed GE Mark-V system at our site for compression of air. Which implies that gas turbine is driving a centrifugal compressor. Previously the run status that HMI displayed was FSNL (Full Speed No Load). However, due to some issue, the machine had to be shutdown and some maintenance jobs were performed on it. After that, when the machine was started, the run status it shows has changed to Governor. Can anyone explain this? The machine is run in Droop mode.