Lenovo HX1310 Installation And Service Manual page 69

• Power supply
• Power cord
Note: You must turn on the server for the dc LED on the power supply to be lit.
The following illustration shows the locations of the power-supply LEDs on the ac power supply.
Figure 19. ac power-supply LEDs
The following table describes the problems that are indicated by various combinations of the power-supply
LEDs on an ac power supply and suggested actions to correct the detected problems.
ac power-supply LEDs
ac dc Error (!)
On On /
Blinking
On Blinking
Off Off
Description
Off Normal operation.
Off Zero Output mode
Off No ac power to the
server or a problem
with the ac power
source.
Action
1. Make sure that the ac power
source meets the minimum
voltage requirement for the
installed power supplies.
2. Make sure that the power
cord is connected to a
functioning power source.
3. Restart the server. If the
error remains, check the
power-supply LEDs.
ac
dc
Notes
The zero output mode
is used to configure
the power supply
behavior as standard
redundant mode or
zero-output mode
by the host system.
When the power
supply is configured
to this mode, minimal
power consumption
is maintained. At the
same time, the power
supply will keep its
fan rotating, and the
PSU LED should blink
at a rate of 1 Hz.
This is a normal
condition when no ac
power is present.
.
Chapter 3 Troubleshooting
55