If a fan module fails, the system issues critical alerts. Replace failed fan modules as soon as possible.
- Prerequisites:
Ensure that you have a Phillips Number 2 screwdriver with at least a 4-inch shaft.
Before handling a component, touch a grounded surface to discharge any static electricity.
Attach an electrostatic discharge (ESD) wrist strap to your wrist, and stand on an ESD mat while replacing components.
Deploy any rack anti-tilt mechanism before releasing the release buttons and extending the Controller chassis.
Fail over the Controller before replacing the component using Guided Maintenance.
Note: The Controller must be failed over to prevent data loss or data corruption during the component replacement process.Initiate Guided Maintenance only when you are able to replace the fan module immediately.
Each Controller has five fan modules that are located side-by-side at the center inside the Controller chassis. A fan module is a customer replaceable unit (CRU). Replacing a fan module requires you to bring the Controller offline. The following figure shows a Controller fan module.
Figure 1 Fan module
Figure 2 Fan module location 
- Legend
1 Fan module-0 2 Fan module-1 3 Fan module-2 4 Fan module-3 5 Fan module-4
Note: The fan modules can be accessed only after removing the top cover over the Controller chassis.
Note: To replace a fan module, you do not need to remove the Controller from the rack but extend it along the Controller rails using the cable management arm (CMA).
Note: Ensure that all power is removed from the Controller before replacing the fan module. Disconnect the power cables before performing the fan module replacement procedure.
Note: For fan replacement, the Replaceable Unit list displays the names of each fan. Each power supply contains one fan, and each fan module contains two fans. If a fan fails in a power supply, replace the power supply. If a fan fails in a fan module, replace the fan module. The following list identifies the names of the fans and the corresponding customer replaceable unit (CRU).
- If the following fan fails
- Replace the following CRU
- Fan 0
- Power supply 0
- Fan 1
- Power supply 1
- Fans 2, 3
- Fan module 0
- Fans 4, 5
- Fan module 1
- Fans 6, 7
- Fan module 2
- Fans 8, 9
- Fan module 3
- Fans 10, 11
- Fan module 4
Procedure Overview