User`s guide

User Guide
65
www.bull.com
Hot-Swappable Power Supply Features
This hot-swappable power supply consists of two independent modules.
It can function properly with only one module.
However, if two modules are fitted, if one of the power modules should fail, the other
one will supply power to the system until you can change the failed module. The failed
module can be hot-swapped.
Note: Connect both power modules to power outlets to ensure continuous
operation.
Power Supply LEDs
There are two LEDs on the back of the power supply. Refer to the table below for more
information.
The PSU is protected against over-temperature conditions that may be caused by a
reduction of the fan cooling or an excessive ambient temperature. In OTP mode, the
power supply unit will eventually shut down.
Hot-Swapping a Power Module
Warning: Hazardous voltage, current, and energy levels are present inside
the power supply. There are no user-serviceable parts inside it; servicing of
the power supply should be done only by technically qualified personnel.
1. Observe the safety and ESD precautions listed in “General Safety
Information” on page 96.
2. Remove the power cable from the defective power supply.
Warning: Put on protective gloves before you follow the instructions
below. The power modules are very hot and there is a risk of severe burns.
Table 2: Power Supply LEDs
Power Supply Condition Status LED
(AC OK /
Power Sup-
ply Fail)
Power LED
(Power
Good)
Remarks
AC Power Off OFF OFF
AC Power On in Standby Green OFF
AC ON and all outputs in
Normal
Green Green
Any DC outputs in short
circuit
Green OFF Power distribution
module board only.
Module OK.
DC Fan not spinning Amber OFF Module protection
only
Over-Temperature Protec-
tion (OTP)
Amber Green Send out alert signal