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LTPH-SM-1014-03, Issue 3
I
F
NSTALLING A
Thumb screw
The HFA-357 fan assembly is installed from the front of the chassis, above the multiplexer tray.
The fans begin operating as soon as the cable is connected. Avoid contact with the fan blades
and do not allow any foreign matter to obstruct the operation of the fan blades.
Do not install fans without connecting the cable. A fan assembly that is not operational will
block air flow and cause overheating.
Step
Procedure
Whenever installing or removing units from the HMS-358 chassis, be sure to wear an
antistatic wrist strap and connect it to the ESD strap input above the HMU slot on the
inside of the chassis.
1
Unscrew the two hold-down lugs on each side of the chassis front cover. The cover folds down.
2
Plug your ESD wrist strap into the ESD input above the HMU slot.
3
Locate the keyed Molex fan cable (connected to the inside of the chassis) and attach it to the circuit
board on the fan assembly. The fans begin operating as soon as the cable is connected.
4
Slide the fan assembly into the opening above the multiplexer tray.
5
Secure the fan assembly in place with the hold-down lugs (one at each corner of the assembly).
6
Proceed to
"Placing the Fan Under HMU Management" on page
? ? ? ?
Installer Signature
HMS-358 List 1 and List 2
A
(O
AN
SSEMBLY
Fan assembly
Figure 38. Installing the Fan Assembly (Cover Down)
January 12, 2001
)
PTIONAL
ESD strap input
Molex fan cable
Thumb screw
62.
Installing Multiplexers
Installer Check ü ü ü ü
H
H
H
H
H
H
Date
61
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