What is the specific or issue you are trying to troubleshoot? What brand of air compressor are you using it with? ES99 Controller Manual | PDF - Scribd
Moreover, counterfeit manuals circulate on shady PDF sites. They might be for a different model (e.g., ES88 or ES100) and contain wrong button combinations. Always verify that the PDF mentions "Model ES99" on the first page. Micro Nova Es99 Manual Pdf