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AC power supply and fan unit LEDs
This section describes the primary power supply and fan unit LEDs on the DS4700
Express Storage Subsystem (models 70A, 70H, 72A, and 72H).
Table 40. Power supply and fan unit LEDs
Number LED Normal Status Problem Status
1 Power supply and fan unit
Power
On Off
2 Service Action Allowed
(OK to Remove)
Off On
3 Service Action Required
(Fault)
Off On
4 Direct Current Enabled
On Off
DC power supply and fan unit LEDs
This section describes the primary dc power supply and fan unit LEDs on the
DS4700 Express Storage Subsystem (models 70S, 70T, 72S, 72T).
ds470007
2 3 4
1
1
234
Figure 96. Power supply and fan unit LEDs
126 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide