ABB Symphony Harmony Series Instruction page 59

Equipment and Tools Required
Table 3-1. Preventive Maintenance Schedule
Check cabinet air filters. Clean or replace them as necessary. Check the air filter
more frequently in excessively dirty environments.
Check cabinet and termination unit for dust. Clean as necessary using an antistatic
vacuum.
Check all termination unit signal, power and ground connections within the cabinet.
Verify that they are secure. Refer to procedure.
Check termination unit circuit board, giving special attention to power contacts and
edge connectors. Clean as necessary. Refer to procedure.
Complete all tasks in this table.
Equipment and Tools Required
Tools and equipment required for maintenance procedures are:
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•
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Preventive Maintenance Procedures
This section covers tasks from Table
instructions or further explanation.
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3 - 2
Task
Antistatic vacuum.
Screwdriver (medium length).
Isopropyl alcohol (99.5 percent electronic grade).
Distilled water.
Compressed air.
Foam-tipped swabs.
Lint-free cloths.
Nonabrasive eraser.
Cleaning printed circuit boards and edge connectors.
Checking signal, power, and ground connections.
Frequency
3 months
12 months
Shutdown
3-1 that require specific
WBPEEUI260047A0