Checking Connections - ABB Symphony Harmony Series Instruction

Preventive Maintenance Procedures
3. Do not use excessive force while burnishing. Use only
enough force to shine the contact surface. Inspect the edge
connector after cleaning to assure no loss of contact surface.
4. Wipe clean with a lint-free cloth.

Checking Connections

There are exposed AC and DC connections inside the cabinet.
These exposed electrical connections present a shock hazard
that can cause injury or death.
If input or output circuits are a shock hazard after disconnect-
WARNING
ing system power at the power entry panel, then the door of the
cabinet containing these externally powered circuits must be
marked with a warning stating that multiple power sources
exist.
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 power connections within the cabinet are
secure.
2. Verify that all field wiring connections to the termination
unit are secure.
6 - 4
NOTE: Power to the cabinet should be off while performing this preventive
maintenance task.
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