MAINTENANCE
PREVENTIVE MAINTENANCE PROCEDURES
6 - 4 I-E96-506B1
®
2. Pull the mounting bracket (and air filter) off the cabinet
door.
3. Remove the air filter from its mounting bracket.
4. Either clean or replace the air filter.
5. If the air filter stays dry and relatively clean, use com-
pressed air to blow dust and dirt free from the filter.
6. Clean a dirty filter in water and a mild detergent (i.e., dish
washing soap). Agitate the filter or squeeze the soapy water
through the filter to remove dirt.
7. When the filter is clean, rinse the filter thoroughly with
water.
8. Air dry the filter before replacing it.
9. Wipe any dust or dirt from the mounting bracket.
10. Return the dry filter to its mounting bracket.
11. Place the mounting bracket into position on cabinet door
and tighten the screw that holds the mounting plate over the
air filter mounting bracket.
Checking Connections
NOTE:
Power to the cabinet should be off while performing this pre-
ventive maintenance task.
Check all signal wiring, power and ground connections within
the cabinet to verify their integrity. When checking connec-
tions, always turn a screw, nut or other fastening device in the
direction to tighten only. If the connection is loose, it will be
tightened. If the connection is tight, the tightening action will
verify that it is secure. There must not be any motion done to
loosen the connection.
1. Verify that all phase, neutral and grounding conductor
connections on the power entry panel are secure.
2. Verify that all other power connections within the cabinet,
including bus bars and connections to the power supplies are
secure.
3. Verify that all field wiring connections to the termination
units or termination modules are secure.
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