You must determine which fan module is faulty before you replace it.
See Front Panel LEDs.
See Fan Module LED.
Start at Remove a Fan Module.
See Accessing the SP.
-> show /System/Open_Problems Open Problems (1) Date/Time Subsystems Component ------------------------ ------------------ ------------ Thu Dec 17 05:18:44 2015 System FMx (Fan Module) fault.chassis.device.fan.fail (Probability:100, UUID:0ebf1655-8700-c90e-fa53-ea6c3b2b25a0, Resource:/SYS/FMx, Part Number:N/A, Serial Number:N/A, Reference Document:http://support.oracle.com/msg/---) ->
where x is 0 to 3.
Start at Remove a Fan Module.
See Open Problem Faults and Oracle ILOM Legacy Target Replaceable Components.
-> show /System/Cooling -t health Target | Property | Value ----------------------------+------------+------ /System/Cooling | health | OK /System/Cooling/Fans/Fan_0 | health | Service Required /System/Cooling/Fans/Fan_1 | health | OK /System/Cooling/Fans/Fan_2 | health | OK /System/Cooling/Fans/Fan_3 | health | OK /System/Cooling/Fans/Fan_4 | health | OK /System/Cooling/Fans/Fan_5 | health | OK /System/Cooling/Fans/Fan_6 | health | OK /System/Cooling/Fans/Fan_7 | health | OK ->
If any fan's health has a value other than OK, replace that fan module. See Oracle ILOM /System Target Replaceable Components to determine which fan module to replace. Then, start at Remove a Fan Module.
-> show /SYS -t fault_state Target | Property | Value -------------------+-----------------------+------- /SYS | fault_state | OK /SYS/FM0 | fault_state | Faulted /SYS/FM0/FAN0 | fault_state | Faulted /SYS/FM0/FAN1 | fault_state | OK /SYS/FM1 | fault_state | OK /SYS/FM1/FAN0 | fault_state | OK /SYS/FM1/FAN1 | fault_state | OK /SYS/FM2 | fault_state | OK /SYS/FM2/FAN0 | fault_state | OK /SYS/FM2/FAN1 | fault_state | OK /SYS/FM3 | fault_state | OK /SYS/FM3/FAN0 | fault_state | OK /SYS/FM3/FAN1 | fault_state | OK . . . ->
In the output, look for the rows beginning with /SYS/FM.
If a fan module's fault states are anything other than OK, replace the fan module. Start at Remove a Fan Module.