The problem is with a fan assembly. Use the following table to determine the part number for the field replaceable unit (FRU):
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 166 | 5886 | 39R6547 | Fan (in power supply FRU) | Un-Ax |
| 166 | 7214-1U2 | 95P3651 | Fan (in power supply FRU) | Un-Ax |
| 166 | 7031-D24, 7031-T24 | 39J0859 | Fan assembly | Un-Ax |
| 166 | 7311-D11, 7311-G30 | 32N1256 | Fan assembly | Un-Ax |
| 166 | 7311-D20 | 39J1176 | Fan assembly | Un-Ax |
| 166 | 8203-E4A | 39J4517 | Fan assembly | Un-Ax |
| 166 | 8204-E4A | 44V3454 | Fan assembly | Un-Ax |