3.1.2 Start-up Check List
CAUTION
Before applying power to the unit, inspect the entire installation as detailed in Table 3.1. Check mark those items when
completed.
Inspect for Description
☑
Auxiliary equipment
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit
breakers that may reside on input power side of Adjustable frequency drive or
output side to motor. Examine their operational readiness and ensure that they
are ready in all respects for operation at full speed.
•
Check function and installation of any sensors used for feedback to Adjustable
frequency drive.
•
Remove power factor correction caps on motor(s), if present
Cable routing
•
Ensure that input power, motor wiring, and control wiring are separated or in
three separate metallic conduits for high frequency noise isolation.
Control wiring
•
Check for broken or damaged wires and loose connections.
•
Check that control wiring is isolated from power and motor wiring for noise
immunity.
•
Check the voltage source of the signals, if necessary.
•
The use of shielded cable or twisted pair is recommended. Ensure that the
shield is terminated correctly.
Cooling clearance
•
Make sure that the top and bottom clearance is adequate to ensure proper
airflow for cooling.
EMC considerations
•
Check for proper installation regarding electromagnetic compatibility.
Environmental considerations
•
See equipment label for the maximum ambient operating temperature limits.
•
Humidity levels must be 5%–95% non-condensing.
Fusing and circuit breakers
•
Check for proper fusing or circuit breakers.
•
Check that all fuses are inserted firmly and in operational condition and that all
circuit breakers are in the open position.
Grounding
•
The unit requires a ground wire from its chassis to the building ground.
•
Check for good ground connections that are tight and free of oxidation.
•
Grounding to conduit or mounting the back panel to a metal surface is not a
suitable ground.
Input and output power wiring
•
Check for loose connections.
•
Check that motor and line power are in separate conduit or separated shielded
cables.
Panel interior
•
Make sure that the unit interior is free of dirt, metal chips, moisture, and
corrosion.
Switches
•
Ensure that all switch and disconnect settings are in the proper position.
Vibration
•
Check that the unit is mounted solidly or that shock mounts are used, as
necessary.
•
Check for any unusual amount of vibration the unit may be subjected to.
Table 3.1 Start-up Check List
Start-up and Functional Tes...
VLT
®
AutomationDrive Instruction
Manual
3-2 MG.33.AI.22 - VLT
®
is a registered Danfoss trademark
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