The inverter is equipped with twenty one fans. Three of the fans are installed in the
AC/DC section of the housing to provide ventilation of enclosure. Twelve of the fans
are installed in the middle of the housing to provide circulation of heat-sinks and
reactors. Six of the fans are installed at the left side of the PEBB for the ventilation of
PCB and PEBB. The fans must be cleaned on a regular basis to ensure maximum
performance. If there are any problems with the fans, repair or replace them.