HP EML E-series Tape Libraries - Manual (Page 63)

Figure 43 Indicator on the autoranging power supply
Table 17 Indicator on the autoranging power supply
Index
No.
Indicator Function
1 Power LED
When lit (green), indicates that all four DC outputs and
the fan speed are within specification, and the AC boost
circuit is active.
When not lit, indicates the main library power switch is
turned off or the power supply is in a failed condition and
is available for a hot swap.
Power supply in the card cage expansion module
Enterprise Modular Library E-Series 63