Upper And Lower Fan Tray Modules - Emerson AXP1620 Installation And Use Manual

Upper and Lower Fan Tray Modules

6.5
AXP1620 Installation and Use (6806800E23E)
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wall downward and slip a flat-bladed screwdriver between the cover and the terminal
block wall and pry the cover tab up to relieve it from the embossment in the terminal
block wall. Once the upper cover tab is free from the terminal block embossment,
the cover should rotate downward and free itself from the lower embossment.
If the multimeter indicates there is still power present and power cannot be removed
from the terminals, the entire shelf must be powered down to perform the PEM
replacement.
9. Confirm that there is no power to the PEM lug bolts. Using a multimeter, measure
between the two lugs and then measure between the chassis ground and each lug.
If the DC potential is 3.0VDC or less, then power is not present.
10.Remove the DC power cable from the dual lug bolts on the PEM you are replacing,
being careful to place the two cables so they cannot short to each other or to other
conductors.
11.Loosen the standoff/lockout screw extensions and remove the PEM from the slot by
pulling straight out of the rail guides.
12.Remove the standoff/lockout screw extensions and put them aside to use when
installing the new PEM.
Upper and Lower Fan Tray Modules
To prevent system damage, the operator must replace the fans within the recommended service
interval shown in the following table to prevent a decline in shelf operability. Make sure the
replacement FTM is available for exchange and ready to install.
Service Interval for 1 FTM
Not recommended
Four hours
When a FTM is taken out of operation, the system manager will compensate for the loss by
increasing the speed of the remaining fans, as needed. Please read the following caution before
replacing any of the FTMs.
Fans may continue to rotate after power is removed. Be careful to keep fingers away
from the bottom of the FTM enclosure.
Temperature Range
40-55°C
40°C maximum
FRU Installation
113