If the Access LED is observed to be blinking red, the module has detected an over-temperature condition. Continued use of the PXIe-6674 in this condition is not recommended as product reliability may become compromised. Since several common problems can cause an over-temperature condition, please investigate the following:
Check that all chassis covers, filler panels, and/or slot blockers are installed.
Make sure that the chassis fan speed is set to the highest setting.
If applicable, check that the chassis fan air intake is not blocked and that the fan filters are clean.
Make sure that the ambient temperature around the chassis isn't above the rated temperature specifications. If so, move the chassis to a cooler ambient temperature location.