DS8000 Service Documentation Version 7.5

Checking the expansion rack switch settings

Procedure

Only on the expansion rack being installed, ensure the rack operator panel UEPO red switch is in the Off (bottom pushed in ) position. See Figure 1.
Figure 1. UEPO switch

Use Table 1 to check the switch setting on both PPSs (upper and lower) in the expansion rack being installed.

Table 1. Switch settings and locations for expansion rack PPS modules and battery assemblies
Switch	Setting	Location	Figure reference
Battery assembly circuit breakers CB0 and CB1	On (up)	At the rear of the battery module assemblies	in Figure 2
Primary power supply circuit breaker CB00	Off (down)	On each PPS, on the AC input power module (rear of rack)	in Figure 2
Primary power supply sequencer module enable/disable switches	Enabled (up)	Three switches on each sequencer module (rear of rack)	in Figure 3
Enable/disable switches on the PPS 208V DDM power module	Enabled (up)	Two switches on each PPS 208V DDM power module (rear of rack)	in Figure 4
Enable/disable switch on the PPS booster power module (Power Line Disturbance [PLD] module), if present	Enabled (up)	Optional module, only present for PLD feature. One on each PPS on booster power module (rear of rack)	in Figure 5

Figure 2. Rear of rack PPS and battery module enclosure circuit breakers

Figure 3. Model 951 PPS sequencer module and LED enable/disable switch

Figure 4. Enable/disable switch on a 208V DDM power module (PPS)

Figure 5. Enable/disable switch on booster power module