Netgear RN422X122 – ReadyNAS 4220 2U 12-Bay 12x2TB Enterprise Drives w/ 2x 10GbE Hardware Manual

Slide the top cover back.

Lift the top cover from the chassis.

You can now access the inside of the system.

If a fan fails, the remaining fans ramp up to full speed, the Error LED on the control panel lights, and an
email alert is sent to the system administrator. Replace a failed fan as soon as possible. Remove the top
chassis cover while the system is still running to determine which fan failed.

Fans are hot-pluggable, so you do not need to power down your system when replacing a fan.