IBM FlashSystem 900, Service Manual

Page: 26 / 546

Safety
Check that:
¹
Electrical continuity is assured between the frame ground and the terminals indi-
cated on the ground distribution diagrams.
¹
Electrical continuity is assured between the 3745, frame grounds, and to the premises
grounding system, through the 3745 power cord.
b
Grounding on the 3746-900 and Controller Expansion to the Premises Grounding
System
¹
Electrical continuity is assured between their frame ground and premises grounding
system through their power cords.
¹
The 3746-900 is grounded:
– To the 3745 Model 17A via the power control cable (see Figure 0-1 on page xxv).
– To the 3745 Models 21A to 61A via the UEPO cable (see Figure 0-2 on page xxvi).
¹
For the controller expansion, an additional ground wire
.A/
is also used (see Figure 0-3 on
page xxvii, Figure 0-4 on page xxviii, Figure 0-5 on page xxix, or Figure 0-6 on
page xxx).
1
3745 Model 17A/3746-900 Power Control Cable
Check that the power ground cable is correctly connected in the 3745
.D/
and in the
3746-900
.C/
.
xxiv
3746-900: Service Guide