Commissioning; Safety Instructions; Applying Power - Danfoss VLT FC 103 Operating Manual

Commissioning

6 Commissioning

6.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
HIGH VOLTAGE
Drives contain high voltage when connected to AC mains
input power. Failure to use qualified personnel to install,
start up, and maintain the drive can result in death or
serious injury.
•
Only qualified personnel must install, start up,
and maintain the drive.
Before applying power:
1. Ensure that input power to the unit is OFF and
locked out. Do not rely on the drive disconnect
switches for input power isolation.
2. Verify that there is no voltage on input terminals
L1 (91), L2 (92), and L3 (93), phase-to-phase, and
phase-to-ground.
3. Verify that there is no voltage on output
terminals 96 (U), 97 (V), and 98 (W), phase-to-
phase, and phase-to-ground.
4. Confirm continuity of the motor by measuring
ohm values on U–V (96–97), V–W (97–98), and W–
U (98–96).
5. Check for proper grounding of the drive and the
motor.
6. Inspect the drive for loose connections on the
terminals.
7. Check that all cable glands are firmly tightened.
8. Confirm that the supply voltage matches the
voltage of the drive and the motor.
9. Close and securely fasten the front cover.
MG16P222
Operating Guide

6.2 Applying Power

WARNING
UNINTENDED START
When the drive is connected to AC mains, DC supply, or
load sharing, the motor may start at any time, causing
risk of death, serious injury, and equipment, or property
damage. The motor may start by activation of an
external switch, a fieldbus command, an input reference
signal from the LCP or LOP, via remote operation using
MCT 10 Set-up software, or after a cleared fault
condition.
To prevent unintended motor start:
•
•
•
1.
2.
3.
4.
5.
NOTICE
If the status line at the bottom of the LCP reads AUTO
REMOTE COASTING or alarm 60, External Interlock is
shown, this status indicates that the unit is ready to
operate but is missing an input signal on terminal 27.
See chapter 5.8.5 Enabling Motor Operation (Terminal 27)
for details.
Danfoss A/S © 04/2018 All rights reserved.
Press [Off] on the LCP before programming
parameters.
Disconnect the drive from mains whenever
personal safety considerations make it
necessary to avoid unintended motor start.
Check that the drive, motor, and any driven
equipment is in operational readiness.
Confirm that the input voltage between phases is
balanced within 3%. If not, correct input voltage
imbalance before proceeding. Repeat this
procedure after the voltage correction.
Ensure that optional equipment wiring, if present,
matches the installation application.
Ensure that all operator devices are in the OFF
position.
Close all panel doors and securely fasten all
covers.
Apply power to the unit. DO NOT start the drive
now. For units with a disconnect switch, turn to
the ON position to apply power to the drive.
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