-
Check for broken or damaged wires and loose connections.
Check that the 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.
Ensure that the top and bottom clearance is adequate to ensure proper airflow for cooling, see 3.3.1
Cooling.
Check that requirements for ambient conditions are met.
Fusing and cir-
cuit breakers
Check for proper fusing or circuit breakers.
Check that all fuses are inserted firmly and are in operational condition, and that all circuit breakers are
in the open position.
Check for sufficient ground connections and ensure that those connections are tight and free of oxida-
tion.
Grounding to conduit, or mounting the back panel to a metal surface, is not a suitable grounding.
Input and out-
put power wir-
ing
Check for loose connections.
Check that the motor and mains cables are in separate conduit or separated shielded cables.
Inspect that the unit interior is free of dirt, metal chips, moisture, and corrosion.
Check that the unit is mounted on an unpainted metal surface.
Ensure that all switch and disconnect settings are in the proper positions.
Check that the unit is mounted solidly, or that shock mounts are used, as necessary.
Check for an unusual amount of vibration.
C A U T I O N
INTERNAL FAILURE HAZARD
An internal failure in the drive can result in serious injury when the drive is not properly closed.
Ensure that all safety covers are in place and securely fastened before applying power.
AQ267037727118en-000101 / 130R0300 | 21Danfoss A/S © 2021.01
Electrical Installation
VLT® AutomationDrive FC 301/FC 302
Operating Guide
To Next Page
Loading...
Need help?
General