General precautions – Rockwell Automation 22C PowerFlex 400 AC Drive FRN 1.xx - 7.xx User Manual
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Overview
P-3
PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22C-UM001I-EN-P
General Precautions
ATTENTION: To avoid an electric shock hazard, verify that the
voltage on the bus capacitors has discharged before performing any
work on the drive. Measure the DC bus voltage at the –DC and +DC
terminals or at the –DC and P2 terminals on the Power Terminal Block
(refer to
Power Terminal descriptions). The voltage must be
zero.
A darkened LCD display and LEDs is not an indication that capacitors
have discharged to safe voltage levels.
ATTENTION: Only qualified personnel familiar with adjustable
frequency AC drives and associated machinery should plan or
implement the installation, start-up and subsequent maintenance of the
system. Failure to comply may result in personal injury and/or
equipment damage.
ATTENTION: This drive contains ESD (Electrostatic Discharge)
sensitive parts and assemblies. Static control precautions are required
when installing, testing, servicing or repairing this assembly.
Component damage may result if ESD control procedures are not
followed. If you are not familiar with static control procedures,
reference A-B publication 8000-4.5.2, “Guarding Against Electrostatic
Damage” or any other applicable ESD protection handbook.
ATTENTION: An incorrectly applied or installed drive can result in
component damage or a reduction in product life. Wiring or application
errors, such as, undersizing the motor, incorrect or inadequate AC
supply, or excessive ambient temperatures may result in malfunction of
the system.
ATTENTION: The bus regulator function is extremely useful for
preventing nuisance overvoltage faults resulting from aggressive
decelerations, overhauling loads, and eccentric loads. However, it can
also cause either of the following two conditions to occur.
1. Fast positive changes in input voltage or imbalanced input voltages
can cause uncommanded positive speed changes;
2. Actual deceleration times can be longer than commanded
deceleration times
However, a “Stall Fault” is generated if the drive remains in this state
for 1 minute. If this condition is unacceptable, the bus regulator must be
disabled (see parameter