Ok to help you I need better info. Your description is very confusing. Firstly, there are 2 warning sounds. One is a constant beep, beep, beep. The 2nd is a more musical rippling sound, like when you 1st switch power on. Which one are you getting when the fault occurs? Secondly, saying the LED along the top 2 off, 3 on, 3 off means absolutely nothing if you don't say which side you are counting from. Each light has a different numerical value. Count from left to right and tell exactly which lights are on and which are off when it beeps.
Lincoln Appliance NZ, December 2013