Cisco Systems XR 12410 manual Additional Power Subsystem Troubleshooting Information

Chapter 4 Troubleshooting the Installation

Troubleshooting the Power Subsystem

•DCOK (green)—Indicates that the power supply is operating normally, and is within the nominal operating range. This indicator lights a few seconds after the INOK indicator lights.

–If the DCOK indicator is off, replace the power supply.

Because there are redundant power supplies, a problem with the DC output voltage to the backplane from only one PEM should not affect router operation. When the router is equipped with two DC power supplies, it powers on and operates even if one power supply fails.

Additional Power Subsystem Troubleshooting Information

This section contains additional troubleshooting information to help you isolate the cause of a power problem.

The MBus modules powering the alphanumeric displays on the RP and line cards are powered by +5 VDC from the backplane. The blower modules use –48 VDC from the backplane. If both the RP and the blower modules are operating, all internal correct DC voltages are present.

Enter the show environment command at the user EXEC mode prompt to display temperature and voltage information for each installed card, blower module, and PEM as shown in this example:

router#show environment

Slot #	Hot Sensor	Inlet Sensor
	(deg C)	(deg C)
1	38.0	32.5
3	36.5	39.0
5	37.0	37.0
7	36.0	32.0
16	26.0	26.0
17	27.5	27.5
18	27.0	27.5
19	0.0	0.0
20	27.0	27.5
21	28.0	28.0
22	28.0	28.0
24	47.0	NA
29	NA	22.0

	Slot # PEM Over Temperature Sensors
	Cisco XR 12410 Router Installation Guide
4-12	OL-13832-01