Fujitsu PRIMERGY RX2540 M6 Upgrade And Maintenance Manual page 569

CAUTION
▶
Since the fan module is not included in the minimum startup
configuration, the server must be shut down immediately after the
diagnostic process is complete (POST phase has been passed).
▶
The minimum startup configuration must be used exclusively for
diagnostic purposes by maintenance personnel, never in daily
operation!
RX2540 M6 Upgrade and Maintenance Manual
Appendix A
569