Fujitsu M10-4 Service Manual page 160

Figure 7-7 Inactive/hot replacement flow (for a power supply unit or fan unit)
1. Open rack door
2. Switch mode switch
3. Check operating condition of chassis
requiring maintenance
4. Power off chassis requiring maintenance
5. Release FRU requiring maintenance from
system
6. Remove front cover
7. Replace faulty FRU
8. Install front cover
9. Incorporate replacement FRU into system
10. Diagnose replacement FRU
11. Confirm that there is no problem with
12. Return mode switch to original mode
13. Power on chassis requiring maintenance
14. Close rack door
146 Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･ June 2023
replacement FRU
Maintenance complete