Johnson Controls VSD Series User Manual page 14

VSD Series Drives User Manual
Cautions
xii
An upstream disconnect/protective device must be provided as
required by the National Electric Code (NEC). Failure to follow this
precaution may result in death or severe injury.
Before opening the VSD Series drive covers:
• Disconnect all power to the VSD Series drive.
• Wait a minimum of 5 (five) minutes after all the lights on the
keypad are off. This allows time for the DC bus capacitors to
discharge.
• A hazardous voltage may still remain in the DC bus capacitors
even if the power has been turned off. Confirm that the
capacitors have fully discharged by measuring their voltage
using a multimeter set to measure DC voltage.
Failure to follow the above precautions may cause death or severe
injury.
The VSD Series output terminals U, V and W correspond to a phase
rotation of ABC. If the input terminals L1, L2 and L3 have not been
wired for ABC, the motor rotation will be different when powered
from the bypass instead of the VSD Series drive which can result in
personal injury and equipment damage. In this situation the input
line wiring must be changed to correspond to ABC rotation.
Do not perform any Megger or voltage withstand tests on any part
of the VSD Series drive or its components. Improper testing may
result in damage.
Prior to any tests or measurements of the motor or the motor cable,
disconnect the motor cable at the VSD Series output terminals (U,
V, W) to avoid damaging the VSD Series drive during the motor or
cable testing.
Do not touch any components on the circuit boards. Static voltage
discharge may damage the components.
Any electrical or mechanical modification to this equipment
without prior written consent of Johnson Controls will void all
warranties and may result in a safety hazard in addition and
voiding of the UL listing.
For more information visit: www.johnsoncontrols.com
WARNING
WARNING
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
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November 2009
LIT-1201828