Jcs 1200 Fan Module Overview; Jcs 1200 Fan Module Description; Jcs 1200 Fan Module Led - Juniper JCS 1200 Hardware Manual

Juniper Control System (JCS) 1200 Platform Hardware Guide
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JCS 1200 Fan Module Overview

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JCS 1200 Fan Module Description

The JCS 1200 platform comes with four hot-swappable fan modules for cooling
redundancy. The fan module speeds vary depending on the ambient air temperature
within the JCS 1200 platform, which is reported by the media tray. If the ambient
temperature is 77° F (25° C) or below, the JCS 1200 platform fan modules run at
their minimum rotational speed. If the ambient temperature is above 77° F (25° C),
the fan modules run faster, increasing their speed as required to control internal
JCS 1200 platform temperature. Each fan module contains two fans operating as a
pair in a series. If one fan fails, the remaining fan runs at full speed and continues
to cool the JCS 1200 platform. Replace a failed fan module as soon as possible to
restore cooling redundancy.
NOTE: While the JCS 1200 is operating, remove only one fan module at a time.
Removing two fan modules might cause the JCS 1200 platform to overheat. If you
remove two fan modules while the JCS 1200 platform is operating, the management
module powers off all Routing Engines.
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JCS 1200 Fan Module LED

Figure 6 on page 15 shows the location of the LED on the fan module.
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JCS 1200 Fan Module Overview
JCS 1200 Alarm Panel Module Description on page 12
JCS 1200 Alarm Panel Module Connectors and LEDs on page 12
JCS 1200 Alarm Panel Module Interface Connector Electrical
Specifications on page 194
Pinouts for the JCS 1200 Alarm Panel Interface Connector on page 213
Replacing a JCS 1200 Alarm Panel Module or Module Filler on page 96
Locating the JCS 1200 Alarm Panel Serial Number on page 197
JCS 1200 Fan Module Description on page 14
JCS 1200 Fan Module LED on page 14
JCS 1200 Fan Module LED on page 14
Replacing a JCS 1200 Fan Module on page 116
Troubleshooting JCS 1200 Fan Module Problems on page 86
Locating the JCS 1200 Fan Module Serial Number on page 198