The MAC 600 NT fan speed control system, which was implemented in software version 1.2, can reduce fan speed too much in certain conditions and result in overheating and potential damage to the fixture. We strongly advise that automatic fan speed regulation be disabled until improvements can be made. To disable, set the SPEC/FAN personality setting to FULL from the fixture┬┤s control panel. Version 1.3 software, which has been implemented in production and will soon be available for download, removes the fan speed regulation feature.