You must determine which fan module is faulty before you replace it.
See Chassis Status LEDs.
See Fan Module LED.
Start at Remove the Air Duct Assembly.
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 the Air Duct Assembly.
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 the Air Duct Assembly.
-> 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 the Air Duct Assembly.