There has been a firmware upgrade and the previous “SAFE” wording has been replaced with “LOAD %”. There is no setting available to restore the device back to the original “SAFE” wording.
The reason for the upgrade is that the useful “LOAD %” value was previously only viewable by navigating through a user menu. It has been decided to move this information onto the front display.
The overall status of the MLHG6 Line Isolation & Overload Monitor (LIOM) can still be determined by the green “SAFE” LED or yellow “HAZARD” LED.
Software versions D384V1.00 and below (viewable via INFO user menu)
Serial No. 16 01 501490 and below
Date code: Below March 2016
“LOAD %” Version
Software versions: D384V1.02 and above (viewable via INFO user menu)
Serial No: 16 03 511881 and above
Date code: March 2016 and above