Troubleshooting Guide Manual

Installation and Start-Up Guidelines
4-7
Step 5. Verify the following:
a. All connections are in strict conformance to the wiring diagrams.
b. There are no loose or broken connections.
c. There are no damaged components.
Step 6. Repeat the original test that failed.
4.7.2 Recommended Test Equipment
Rockwell recommends the following test equipment:
•
Isolated oscilloscope with a current probe and x100 probe for DC bus
measurements. An isolation transformer is needed to isolate the oscilloscope and
any other equipment.
•
AC and DC clamp-on ammeters
•
Isolated multimeter having a sensitivity of 20KΩ/volt
•
Chart recorder
•
Isolated voltmeter
•
50 ohm, 50W resistor for discharging bus capacitors
•
Appropriate safety equipment, e.g., safety glasses and safety gloves
A megohmmeter (megger) may be used to reliably verify the absence of inadvertent
grounding of the motor. Failure to follow proper procedure when using a megger may
cause damage to the drive.
4.7.3 Physically Inspecting the Equipment
Before operating the equipment, DISCONNECT AND LOCK OUT ALL INCOMING
LINE POWER AND CONTROL POWER TO THE DRIVE and perform the following
steps:
Step 1. Carefully inspect the Power Module and other drive components for physical
damage. Verify free operation of all switch relays, auxiliary contacts, and
contactors.
Step 2. Visually inspect internal wiring for loose or broken connections or damaged
wires.
Step 3. Visually check for damaged components.
Step 4. Check fuses.
Step 5. Verify that all shutdown interlocks around the machine are operational.
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