CHAPTER 12
Replaceable Components 121
Air Filters 121
Determining When an Air Filter Needs Replacing 121
High Operating Temperatures and Fan Speeds 121
Temperature and Fan Alarm Commands 122
show fans Command 122
show temperature Command 122
Replacing an Air Filter 122
Front Air Filter 123
Rear Air Filter 125
Fan Tray Units 127
Determining Whether a Fan Tray Unit Needs Replacing 127
Replacing Front Fan Trays 127
Replace the Upper Fan Tray 129
Replace the Lower Fan Tray 131
Replacing Rear Fan Trays 131
Replace the Upper Fan Tray 132
Replace the Lower Fan Tray 133
PFU 135
Determining that a PFU has Failed 135
Replacing a PFU 135
Circuit Cards 137
Determining Whether a Card has Failed 138
show card diag Command 138
SNMP Traps 139
Replacing Universal Cards 139
Backing Up the System Configuration 140
Synchronize File System 140
Preparing a Card for Replacement 140
Replacing a Failed Card 141
Remove I/O Connections (MIO/UMIO and SSC) 142
MIO or UMIO 142
SSC 142
Remove and Replace the Circuit Card 142
ASR 5500 Installation Guide
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Contents