Troubleshooting guide

MX2820 System Manual
7-14 61186003L1-1D
NOTE
This assembly operates at –48 VDC only.
Fan Assembly (One-to-One Cooling, Pusher Fan)
When the MX2820 shelf is installed in an existing rack having limited space, a pusher fan can
be installed. The MX2820 Fan Module is a single 1U housing that incorporates a filter, circuit
boards, and fans to provide forced air ventilation for the MX2820 Chassis and all of its
associated modules. It is installed immediately below the MX2820 Shelf and is designed to
cool a single chassis. The MX2820 and pusher fan assembly occupy 3U of space in the rack.
NOTE
This assembly operates at either –48 VDC or ±24 VDC.
PREREQUISITE PROCEDURES
Obtain all necessary local instructions before proceeding with the MX2820 shelf installation.
Refer to “Section 2, Engineering Guidelines”, and “Section 4, Site Preparation”. Based on the
information in “Section 2” and “Section 4”, the installer should know which steps of this
procedure are required for the intended use of the MX2820 shelf.
TOOLS REQUIRED
Mounting the shelves, heat baffles, and fans requires the following tools:
• #2 phillips-head screwdriver
• #1 phillips-head screwdriver
• Straight-slot screwdriver
MATERIALS REQUIRED
Mounting the shelves, heat baffles, and fans requires the following materials:
• Screws for mounting brackets
• Screws for mounting shelf to mounting brackets
• Screws for heat baffle
• Screws for mounting fan assembly to heat baffle
WARNING
To prevent electrical shock, do not install equipment in a wet loca-
tion or during a lightning storm.