fadees

Hi everyone. Almost a year later and mine was fixed (Actually few months back). I don't know exactly what "he" did (the one who fixed it), but thankfully it was fixed. I rarely open this website but here I am. After reading the latest replies and comments, and from my understanding of what "he" said, I can say it's due to moisture, dust, malfunctioning NTC cables or sensors, short in some places or rust. Mine was most affected by 2 things. first, it mounting position. Although it was in a "semi closed" area where curtains are placed but that was not enough. Second, the batteries position with respect to the inverter. My batteries was placed under it. This in not the best position since as you all know, the batteries produce some gases while functioning (assuming your using lead-acid batteries). These gases affect the board and/or the sensors over time. From his experience dealing with the "same" problem with many others, it was best to reverse the air flow so that the fans does not suck the gases into the inverter but rather drag the heat outside. Technically, I don't know how this might affect its functionality in the long term, but in my area where it is neither that hot during summer nor that cold during winter, "he" said that that was the best solution to solve my particular problem. IT SOLVED  MINE AND ONLY MINE.
 
Warning: This may endanger the inverter if not done by a professional who asses the conditions and environment surrounding the inverter.

I just cleaned the dust from outside the inverter and the alarm stopped

Hi guys,
I assume the error code 02 comes due to the following reason,
The inverter is mounted outside of the house. - The moisture in the atmosphere could damage your temperature probe. Cooling fans suck cool air from the environment and blow toward the motherboard. Tiny water particles may corrode the circuit board and cause the said damage. 
Please let me know your thoughts. 

Thanks for the information.