Commissioning; Safety Instructions; Applying Power - Danfoss VLT HVAC Drive FC 102 Instruction Manual

Commissioning

5 Commissioning

5.1 Safety Instructions

See chapter 2 Safety for general safety instructions.
WARNING
HIGH VOLTAGE
5 5
Adjustable frequency drives contain high voltage when
connected to AC line 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 cover properly.
2. Check that all cable connectors are firmly
tightened.
3. Ensure that input power to the unit is OFF and
locked out. Do not rely on the adjustable
frequency drive 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.
6. Confirm continuity of the motor by measuring
ohm values on U-V (96-97), V-W (97-98), and
W-U (98-96).
7. Check for proper grounding of the adjustable
frequency drive as well as the motor.
8. Inspect the adjustable frequency drive for loose
connections on terminals.
9. Confirm that the supply voltage matches voltage
of adjustable frequency drive and motor.
22
®
VLT HVAC Drive FC 102

5.2 Applying Power

UNINTENDED START
When the adjustable frequency drive is connected to AC
line power, the motor may start at any time, causing risk
of death, serious injury, equipment, or property damage.
The motor can start by means of an external switch, a
serial bus command, an input reference signal from the
LCP, or after a cleared fault condition.
•
•
•
Apply power to the adjustable frequency drive using the
following steps:
1.
2.
3.
4.
NOTICE!
When the status line at the bottom of the LCP reads
AUTO REMOTE COASTING or Alarm 60 External Interlock is
displayed, this message indicates that the unit is ready
to operate but is missing an input signal on, for
example, terminal 27. See chapter 4.8.3 Enabling Motor
Operation (Terminal 27) for details.
Danfoss A/S © 03/2015 All rights reserved.
WARNING
Disconnect the adjustable frequency drive from
line power whenever personal safety consider-
ations make it necessary to avoid unintended
motor start.
Press [Off] on the LCP before programming
parameters.
The adjustable frequency drive, motor, and any
driven equipment must be in operational
readiness when the adjustable frequency drive
is connected to AC line power.
Confirm that the input voltage 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. Panel doors must be closed or cover
mounted.
Apply power to the unit. DO NOT start the
adjustable frequency drive now. For units with a
disconnect switch, turn to the ON position to
apply power to the adjustable frequency drive.
MG11AK22