Hello Are you able to access the CMC? The CMC controls the fan speed. If you remove both CMC modules from the system for a few seconds and then reinsert them it should cause them to redetect the configuration. The fans will go to maximum RPM while the CMCs are removed, and should idle back down when the CMCs come back online. Thanks
Hello! Last week a customer reported that their M1000 chassis fans are running much faster than normal. They has issues with their HVAC system, but has been fixed and the ambient room temp is 18 degrees Celsius. There are no alarms or anything related in the log files they report. Chassis firmware is at 5.0 The chassis has a mix of 11 PE610 and 600 servers. I am not sure where to start troubleshooting this issue. Any advice would be appreciated!  
M1000 chassis fans running too fast