Juniper EX Series

■ EX 3200 Switch—Rear-Panel Description on page 10
■ EX 4200 Switch—Rear-Panel Description on page 12
■ Field-Replaceable Units in EX-series Switches on page 99
AC Power Supply LEDs in EX 3200 and EX 4200 Switches
The AC power supply in an EX 3200 or EX 4200 switch is a hot-removable and
hot-insertable field-replaceable unit (FRU) located on the rear panel. Table 18 on page
30 describes the LEDs on the AC power supplies in EX 3200 and EX 4200 switches.
Table 18: AC Power Supply LEDs in EX 3200 and EX 4200 Switches
State and DescriptionLED
■
Off—Disconnected from power or power is not coming
into the power supply.
■
On—Power is coming into the power supply.
AC OK
■
Off—Power supply is not sending out power correctly.
■
On—Power supply is sending out power correctly.
DC OK
NOTE: If AC OK LED and DC OK LED are unlit, it indicates that either the AC power
cord is not installed properly or the power supply fuse has failed. If AC OK LED is lit
and DC OK LED is unlit, it indicates that the AC power supply is not installed properly
or the power supply has an internal failure.
Related Topics Power Supply in EX 3200 and EX 4200 Switches on page 27■
■ Connecting AC Power to an EX 3200 or EX 4200 Switch on page 79
■ Connecting DC Power to an EX 3200 or EX 4200 Switch on page 81
Cooling System in an EX 3200 Switch
The cooling system in an EX 3200 switch consists of a field-replaceable unit (FRU)
fan tray with one fan (see Figure 20 on page 31). The fan tray is located at the rear
of the chassis and provides side-to-rear chassis cooling (see Figure 21 on page 31).
30 ■ AC Power Supply LEDs in EX 3200 and EX 4200 Switches
Complete Hardware Guide for EX 3200 and EX 4200 Switches