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FOREWORD
Safety Instructions
The following Warnings, Cautions and Notes are provided for your safety and as a means
of preventing damage to the product or components in the machines connected. This
section lists Warnings, Cautions and Notes, which apply generally when handling
MICROMASTER 420 Inverters, classified as General, Transport & Storage,
Commissioning, Operation, Repair and Dismantling & Disposal.
Specific Warnings, Cautions and Notes that apply to particular activities are listed at
the beginning of the relevant chapters and are repeated or supplemented at critical points
throughout these chapters.
Please read the information carefully, since it is provided for your personal safety
and will also help prolong the service life of your MICROMASTER 420 Inverter and
the equipment you connect to it.
General
!
Warnings
This equipment contains dangerous voltages and controls potentially
dangerous rotating mechanical parts. Non-compliance with Warnings or
failure to follow the instructions contained in this manual can result in loss of
life, severe personal injury or serious damage to property.
Only suitable qualified personnel should work on this equipment, and only
after becoming familiar with all safety notices, installation, operation and
maintenance procedures contained in this manual. The successful and safe
operation of this equipment is dependent upon its proper handling,
installation, operation and maintenance.
Risk of electric shock. The DC link capacitors remain charged for five minutes
after power has been removed. It is not permissible to open the
equipment until 5 minutes after the power has been removed.
HP ratings are based on the Siemens 1LA motors and are given for
guidance only, they do not necessarily comply with UL or NEMA HP
ratings.
!
Caution
Children and the general public must be prevented from accessing or
approaching the equipment!
This equipment may only be used for the purpose specified by the
manufacturer. Unauthorized modifications and the use of spare parts and
accessories that are not sold or recommended by the manufacturer of the
equipment can cause fires, electric shocks and injuries.
Notes
Keep these operating instructions within easy reach of the equipment and
make them available to all users
Whenever measuring or testing has to be performed on live equipment, the
regulations of Safety Code VBG 4.0 must be observed, in particular § 8
"Permissible Deviations when Working on Live Parts". Suitable electronic
tools should be used.
Before installing and commissioning, please read these safety instructions
and warnings carefully and all the warning labels attached to the equipment.
Make sure that the warning labels are kept in a legible condition and replace
missing or damaged labels
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
International English
7

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