Our offices will be closed on Monday 21st June for a company holiday. We are giving everyone the day off to say thank you for their commitment, dedication and hard work throughout the COVID-19 pandemic.
Our offices will reopen as usual on Tuesday 22nd June.
In most cases, this means the internal protection has been exceeded (tester has seen greater than 15A), which normally occurs when accidentally testing more than one string at the same time. Make sure there aren’t two strings in parallel connected to a “Y” splitter before the cabling enters the combiner box. Also, check that the system had been fully isolated, and that only one fuse has been closed at any one time during string testing. Depending on the extent of the damage, sometimes the FET error will only be displayed when connected to a string and pressing the AUTO test button. An audible bleep will also be heard. If the FET shows when powering the tester up and not connected to a string, damage is more extensive. Tester needs to be returned for repair in both situations.