Replacing The Air Filter In A Multiservice Switch 7460 - Nortel 7400 Hardware Installation

Replacing the air filter in a Multiservice Switch 7460

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Replace the air filter pad in a Nortel Networks Multiservice Switch 7460 as
part of regular maintenance to ensure proper air flow and to validate processor
card warranties.
CAUTION
Risk of damage to equipment
Never operate a device for longer than 30 minutes
without an air filter. The air filter protects the power
converters, CPs, and FPs from dust and particles.
• You need an air filter foam replacement with part number P0609614.
• Replace an air filter while the switch continues to operate. Remove and
insert an air filter without delay to minimize the amount of time the
switch operates without a filter.
• You need a bag to contain the old filter after it is removed. This reduces
the amount of floating dust from handling the filter.
• The air filter is inside the cooling unit and can be accessed only by
removing the cooling unit.
• The air filter must be replaced every 3 months or more often. Record the
frequency of replacement for the filter in the tables "Customer and
equipment profile" (page 492) and "Schedule for replacing air filters and
vacuuming equipment" (page 492). Ensure that you follow this
frequency. These tables and the figure "An air filter from the cooling unit
for a Multiservice Switch 7460" (page 491) are intended to be printed on
one physical page for your records.
1 Locate the form for recording the air filter replacement for this switch. The
form is a hardcopy combination of the following:
• the table "Customer and equipment profile" (page 492)
• the table "Schedule for replacing air filters and vacuuming
equipment" (page 492)
Chapter 39 Hardware procedures 489