Start Up - Danfoss VLT FC Series Operating Instructions Manual

Start Up

4 Start Up
1. Input power to unit must be OFF and locked out
per OSHA requirements. Do not rely on panel
disconnect switches.
WARNING
HIGH VOLTAGE!
IF INPUT AND OUTPUT CONNECTIONS HAVE BEEN
CONNECTED IMPROPERLY, THERE IS POTENTIAL FOR HIGH
VOLTAGE ON THESE TERMINALS. IF POWER LEADS FOR
MULTIPLE MOTORS ARE IMPROPERLY RUN IN SAME
CONDUIT, THERE IS POTENTIAL FOR LEAKAGE CURRENT TO
CHARGE CAPACITORS WITHIN OPTION PANEL, EVEN WHEN
DISCONNECTED FROM LINE INPUT. FOR INITIAL START UP,
MAKE NO ASSUMPTIONS ABOUT POWER COMPONENTS.
FOLLOW PRE-START PROCEDURES DESCRIBED BELOW.
FAILURE TO FOLLOW PRE-START PROCEDURES DESCRIBED
BELOW COULD RESULT IN DEATH, SERIOUS INJURY OR
DAMAGE TO EQUIPMENT.
1. Use AC voltmeter to verify there is no voltage on
input terminals L1, L2, and L3, phase-to-phase
and phase-to-ground, and output terminals T1,
T2, and T3, phase-tophase and phase-to-ground.
2. Use ohmmeter to confirm continuity of motor by
measuring T1-T2, T2-T3, and T3-T1.
3. Use ohmmeter to confirm open on input by
measuring L1-L2, L2-L3, and L3-L1.
NOTE
If an isolation transformer is between the power source
and panel, continuity will be present. In this case, visually
confirm that motor and power leads are not reversed.
4. Inspect the panel for loose connections on
terminals.
5. Check for proper ground: option panel to main
building distribution ground, and option panel to
motor ground. See label inside panel cover for
proper wire size.
6. Confirm control connections terminated per
connection diagrams supplied with the
equipment.
7. Check for external devices between drive option
panel output and motor. It is recommended that
no devices be installed between motor and drive.
8. Record motor nameplate data; hp, voltage, full
load amps (FLA), and RPM. It will be needed to
match motor and drive later on.
9. Confirm that incoming power voltage matches
drive label voltage and motor nameplate voltage.
10. For multiple winding motors, motor must be
wired on run winding, not start winding.
Option Panel Operating Instructions
EQUIPMENT DAMAGE!
IF MOTOR FLA (FULL LOAD AMPERAGE) IS GREATER THAN
UNIT MAXIMUM AMPS, DRIVE AND OPTION PANEL MUST
BE REPLACED WITH ONE OF APPROPRIATE RATING. DO
NOT ATTEMPT TO RUN UNIT. FAILURE TO MATCH FLA TO
UNIT MAXIMUM AMP RATING MAY RESULT IN EQUIPMENT
DAMAGE.
®
MG14I102 - VLT is a registered Danfoss trademark
CAUTION
1. Confirm motor FLA is equal to or less than
maximum option panel output current. Some
motors have higher then normal NEMA currents.
2. Check that overload relay(s) is set for FLA of
connected motor. Service factor is built into
overload relay.
3. For drive start up procedures, see drive specific
operating instructions.
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