3 Start Up and Functional Testing
3.1 Pre-start
3.1.1 Safety Inspection
WARNING
HIGH VOLTAGE
If
input
and
output
connections have been connected
improperly, there is risk for high voltage on these
terminals. For initial startup, make no assumptions about
power components. Follow pre-start procedures. Failure to
follow pre-start procedures could result in personal injury
or damage to equipment.
1. Input power to the unit must be OFF and locked
out.
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. Inspect the frequency converter for loose
connections on terminals.
6. Close the box, mounting the electronic part onto
the installation box.
7. Check for proper grounding of the frequency
converter as well as the motor.
8. Record the following motor-nameplate data:
power, voltage, frequency, full load current, and
nominal speed. These values are required to
program motor nameplate data later on.
9. Confirm that the supply voltage matches voltage
of frequency converter and motor.
3.1.2 Start Up Check List
CAUTION
Before
applying power to
the unit, inspect the entire
installation as detailed in Table 3.1.
Inspect for Description
☑
Auxiliary
equipment
•
Look for auxiliary equipment,
switches, disconnects, or input
fuses/circuit breakers located on
input power side of frequency
converter, or output side to motor.
Examine their operational readiness
and ensure that they are ready in
all respects for operation at full
speed.
•
Check function and installation of
any sensors used for feedback to
frequency converter
•
Remove power factor correction
caps on motor(s), if present
Cable routing Ensure that input power, motor wiring
and control wiring are
separated or in
three separate metallic conduits for
high frequency noise isolation.
Control wiring
•
Check for broken or
damaged wires
and connections
•
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 at
both ends.
EMC
considerations
Check for proper installation regarding
electromagnetic compatibility.
Environmental
considerations
See equipment label
for the maximum
ambient operating temperature limits.
Temperature
is not to exceed 40°C
(104°F). Humidity levels must be 5-95%
non-condensing.
Cooling
clearance
Units require top and bottom clearance
adequate
to
ensure
proper
air flow for
cooling.
Fusing and
circuit
breakers
Check that all fuses are inserted firmly
and in operational condition
and that
all circuit breakers are in the open
position. Check for proper fusing or
circuit breakers.
Start Up and Functional Tes...
VLT
®
Decentral Drive FCD 302 Operating Instructions
MG04F302 - VLT
®
is a registered Danfoss trademark
29
3 3
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
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