Dell Force10 C300 Installing and Maintaining the C150 System - Page 33

Status LED, Removing a DC PEM

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Status LED The status LED indicates the condition of the PEM. Table 8-3. Status LED Descriptions LED Display Off Flashing Green Flashing Green Solid Green Meaning Description Off No input voltage is present, or the circuit is turned off. Over-Current Warning The load current is above the warning level threshold. This warning takes precedence over the temperature warning. Over-Temperature Warning The temperature is above the temperature warning threshold. Power On The PEM is running normally. Removing a DC PEM The left chassis PEM slot is labelled "0" and the right chassis PEM slot is labelled "1." For full redundancy, each PEM must be attached to a dedicated circuit breaker. For example, PEM "0" connects to circuit breaker "0" and PEM "1" connects to circuit breaker "1." WARNING: Prevent exposure and contact with hazardous voltages. Do not attempt to operate this system with the safety cover removed. Step Task 1 Switch the Over Current Protector (located on the PEM front panel) to the OFF position. 2 Turn off power to the PEM. Ensure that the remote power source is in the OFF position and that the PEM Status LED and Pwr In OK LED are off. 3 Loosen the retaining screw and remove PEM safety cover (see Figure 8-1). 4 Disconnect power cables attached to the PEM. 5 Slide the PEM out of the slot. 6 If you are not replacing the PEM, close the empty slot with a blank panels (CC-C-BLNK-PWR). Installing DC Power Entry Modules | 33

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Installing DC Power Entry Modules
|
33
Status LED
The status LED indicates the condition of the PEM.
Removing a DC PEM
The left chassis PEM slot is labelled “0” and the right chassis PEM slot is labelled “1.” For full
redundancy, each PEM must be attached to a dedicated circuit breaker. For example, PEM “0” connects
to circuit breaker “0” and PEM “1” connects to circuit breaker “1.”
WARNING:
Prevent exposure and contact with hazardous voltages. Do not attempt to operate this system
with the safety cover removed.
Table 8-3.
Status LED Descriptions
LED Display
Meaning
Description
Off
Off
No input voltage is present, or the
circuit is turned off.
Flashing Green
Over-Current Warning
The load current is above the
warning level threshold. This
warning takes precedence over the
temperature warning.
Flashing Green
Over-Temperature Warning
The temperature is above the
temperature warning threshold.
Solid Green
Power On
The PEM is running normally.
Step
Task
1
Switch the Over Current Protector (located on the PEM front panel) to the
OFF
position.
2
Turn off power to the PEM. Ensure that the remote power source is in the
OFF
position and that the PEM
Status
LED and
Pwr In OK
LED are off.
3
Loosen the retaining screw and remove PEM safety cover (see
Figure
8-
1
).
4
Disconnect power cables attached to the PEM.
5
Slide the PEM out of the slot.
6
If you are not replacing the PEM, close the empty slot with a blank panels (CC-C-BLNK-PWR).