H3C S6520X-30QC-EI, Manual, Page: 24 / 57

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high soil resistivity, sprinkle some resistance reducer to reduce soil resistivity or replace soil
around the grounding strip with soil with lower resistance.
For information about resistance measurement, see H3C Network Devices Lightning Protection
Guide .
Installing and removing a fan tray
CAUTION:
•
You can power on the switch only when the switch is fully configured with fan trays of the same
model.
•
Do not leave any slots empty when the switch is operating. Install a module or filler panel in the
slots.
•
If multiple fan trays fail during switch operation, do not remove them simultaneously. Replace the
fan trays one after another and finish replacing each fan tray within 3 minutes.
•
If one fan tray fails while the switch is operating, perform either of the following tasks:

If the ambient temperature is not higher than 27°C (80.6°F), replace the fan tray within 24 hours and
make sure the failed fan tray is in position before the replacement.

If the ambient temperature is higher than 27°C (80.6°F), replace the fan tray immediately.
•
If you power cycle the switch after a fan tray fails, the switch will fail to start up.
The switch comes with empty fan tray slots. Select fan trays for the switch that match the ventilation
requirements at the installation site.
•
The LSWM1FANSCE fan tray provides power supply-side intake and port- and chassis-side
exhaust airflows. The fan tray handle is blue.
•
The LSWM1FANSCBE fan tray provides port- and chassis-side intake and power supply-side
exhaust airflows. The fan tray handle is red.
•
The LSPM1FANSA-SN fan tray provides power supply-side intake and port-side exhaust
airflows.
•
The LSPM1FANSB-SN fan tray provides port-side intake and power supply-side exhaust
airflows.
For the fan trays available for the switch and their specifications, see S6520X-EI & S6520X-HI
Switch Series Hardware Information and Specifications .
Installing a fan tray
1. Wear an ESD wrist strap. Make sure the strap makes good skin contact and is reliably
grounded.
2. Unpack the fan tray and verify that the fan tray model is as required.
3. Orient the fan tray with the TOP mark facing up.
4. Align the fan tray with the fan tray slot. Holding the fan tray handles, slide the fan tray into the
slot along the guide rails. Make sure the fan tray is fully seated in the slot and has a firm
contact with the backplane.
To prevent damage to the fan tray or the connectors in the chassis, insert the fan tray gently. If
you encounter a hard resistance while inserting the fan tray, pull out the fan tray and insert it
again.