• Power Failure?Wait until power recovery.
  • Is plug loose? Reinsert the plug.
  • Air switch trips off or fuses is burn out? Ask professional to replace it.
  • Wiring has malfunction? Ask a professional to replace it.
  • Unit has restarted immediately after stopping operations? Wait for  3 min and the turn on the unit again.  
  • Whether the  function setting for remote  controller is correct ? Reset the function