Juniper MX2010, Hardware Manual, Page: 720 / 825

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Control Board and Routing Engine (CB-RE) LEDs—For the Control Board portion of the CB-RE, there is
a set of bicolor LEDs, labeled OK/FAIL, LINK, ExtClk-0, ExtClk-1, BITS, and GPS. For the Routing Engine
portion of the CB-RE, there are three LEDs, labeled ONLINE, MASTER, and OK/FAIL. These LEDs on
the faceplate indicate the status of the CB-RE.
NOTE: Even though the Control Board and Routing Engine (CB-RE) are combined into one
unit; the LED functionality is separate for the Control Board and Routing Engine.
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AC delta or wye PDM LEDs—One LED for each input terminal block indicating the input feed status.
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DC PDM LEDs—One LED on each PDM next to each of the nine –48VDC power feeds indicates the
status of that PDM’s incoming power.
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AC or DC PSM LEDs—Four LEDs, labeled PWR OK, FAULT, INP0, and INP1, on each PSM faceplate
indicate the status of that PSM.
RELATED DOCUMENTATION
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Troubleshooting the MX2010 Cooling System | 706
Troubleshooting the MX2010 MPCs | 726
Troubleshooting the MX2010 MICs | 725
Troubleshooting the MX2000 Router Power System | 320
Troubleshooting the MX2010 Cooling System
Problem
Description: The following alarms, LEDs, and other conditions indicate a problem with the cooling system:
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A red alarm indicates that temperature of the router exceeds the maximum (“temperature hot”) threshold.
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Automatic shutdown of the power system was caused by the temperature of the router exceeding the
maximum (“temperature hot”) threshold.
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A red alarm indicates that a fan failed.
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A yellow alarm indicates that the router temperature exceeds the “temperature warm” threshold.
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A yellow alarm indicates that one of the fan trays was removed.
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One or more fans in a fan tray function at full speed. The CB-RE constantly monitors the temperatures
detected by sensors on the midplane and router components, adjusting the speed of the fans as necessary.
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