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Chapter 1 – Getting Started
Important Precautions
In addition to the precautions listed throughout this manual, you must read and understand the following
statements which identify hazards associated with AC drives.
ATTENTION
The Bulletin 161 drive contains high voltage DC bus capacitors which take time to discharge after
removal of input power. Before working on the drive, wait five minutes for capacitors to discharge to
safe voltage levels.
Darkened display LEDs are not an indication that capacitors have discharged to safe voltage levels.
Failure to observe this precaution could result in severe bodily injury or loss of life.
ATTENTION
This Bulletin 161 drive generates dangerous electrical voltages and controls potentially dangerous
rotating mechanical parts. Disregarding the guidelines provided in this manual could result in severe
bodily injury or loss of life.
Only personnel familiar with the drive and associated machinery should plan or implement the
installation, start-up and subsequent maintenance of the system. Failure to comply could result in
bodily injury and/or damage to the equipment.
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. Failure to observe this precaution could result in
damage to the equipment.
ATTENTION
The drive is intended to be installed with a fixed ground connection. The protective ground only offers
protection for the drive, not against personal injury. According to EN 50178 it is not recommended to use
the Bulletin 161 drives on protective fault current switches as, due to a possible DC component (rectifier
load), the sensitivity of the safety switch will be reduced in the event of a failure. If unavoidable, only type
B Residual Current Operated Protective Devices (RCD’s) should be used. As a precautionary measure,
the EN 50178 regulations should be observed. Failure to observe this precaution could result in severe
bodily injury or loss of life.
ATTENTION
An incorrectly applied or installed drive can result in component damage or reduction in product life.
Wiring or application errors such as undersizing the motor, supplying an incorrect or an inadequate AC
supply, or excessive ambient temperatures may result in system malfunction. Failure to observe this
precaution could result in damage to the equipment.
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