Commissioning; Safety Instructions - Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual

Commissioning

5 Commissioning

5.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Failure to perform
installation, start-up, and maintenance by qualified
personnel could result in death or serious injury.
•
Installation, start-up, and maintenance must be
performed by qualified personnel only.
Before applying power:
1. Close the cover properly.
2. Check that all cable glands are firmly tightened.
3. Ensure that input power to the unit is off and
locked out. Do not rely on the frequency
converter disconnect switches for input power
isolation.
4. Verify that there is no voltage on input terminals
L1 (91), L2 (92), and L3 (93), phase-to-phase, and
phase-to-ground.
5. Verify that there is no voltage on output
terminals 96 (U), 97 (V), and 98 (W), phase-to-
phase, and phase-to-ground.
Confirm continuity of the motor by measuring Ω
6.
values on U-V (96–97), V-W (97–98), and W-U (98–
96).
7. Check for proper grounding of the frequency
converter as well as the motor.
8. Inspect the frequency converter for loose
connections on the terminals.
9. Confirm that the supply voltage matches the
voltage of the frequency converter and the
motor.
MG16N102
Operating Instructions
Danfoss A/S © 08/2015 All rights reserved.
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