Symbols; Safety - Danfoss VLT Series Operating Instructions Manual

1 Extended and Advanced Cascade Controller
Option
NB!
1
MCO 101/102 is software supported from version 1.24 onwards.

1.1.5 Symbols

When reading through this Operating Instructions, you will come across various symbols that require special attention.
The symbols used are the following:
Indicates a general warning.
NB!
Indicates something to be noted by the reader.
Indicates a high-voltage warning.
1.2 Safety and Caution

1.2.1 Safety

Rotating shafts and electrical equipment can be hazardous. Therefore, it is strongly recommended that all electrical work conform to
National Electrical Code (NEC) and all local regulations. Installation, start-up and maintenance should be performed only by qualified
personnel.
Factory recommended procedures, included in this manual, should be followed. Always disconnect electrical power before working on the unit. Although
shaft couplings or belt drives are generally not furnished by the manufacturer, rotating shafts, couplings and belts must be protected with securely
mounted metal guards that are of sufficient thickness to provide protection against flying particles such as keys, bolts and coupling parts. Even when the
motor is stopped, it should be considered "alive" as long as its controller is energized. Automatic circuits may start the motor at any time. Keep hands
away from the output shaft until the motor has completely stopped and power is disconnected from the controller.
Motor control equipment and electronic controls are connected to hazardous line voltages. When servicing drives and electronic controls, there will be
exposed components at or above line potential. Extreme care should be taken to protect against shock. Stand on an insulating pad and make it a habit
to use only one hand when checking components. Always work with another person in case of an emergency. Disconnect power whenever possible to
check controls or to perform maintenance. Be sure equipment is properly grounded. Wear safety glasses whenever working on electric control or rotating
equipment.
Safety Guidelines
1. The drive must be disconnected from the AC line before any service work is done.
2. The "Stop/Off" key on the of the drive does not disconnect the equipment from the AC line and is not to be used as a safety switch.
3. Correct protective grounding of the equipment must be established. The user must be protected against supply voltage and the motor must be
protected against overload in accordance with applicable national and local regulations.
4. Ground currents are higher than 3 mA.
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MI.38.C3.02 - VLT is a registered Danfoss trademark
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VLT Operating Instructions