ABB ACH550-02-602A-4 [10/454] Safety instructions

ABB ACH550-02-645A-4 [10/454] Safety instructions
6 Contents of this manual
ACH550-02 Users Manual
Use of warnings and notes
There are two types of safety instructions throughout this
manual:
Warnings caution you about conditions which can result in
serious injury or death and/or damage to the equipment.
They also tell you how to avoid the danger.
Notes draw attention to a particular condition or fact, or give
information on a subject.
The warning symbols are used as follows:
Electricity warning warns of hazards from electricity
which can cause physical injury and/or damage to the
equipment.
General warning warns about conditions, other than
those caused by electricity, which can result in physical
injury and/or damage to the equipment.
Safety instructions
WARNING! The ACH550 should ONLY be installed by a
qualified technician.
WARNING! Even when the motor is stopped, dangerous voltage
is present at the power circuit terminals U1, V1, W1 and U2, V2,
W2, and UDC+ and UDC-.
WARNING! Dangerous voltage is present when input power is
connected. After disconnecting the supply, wait at least 5
minutes before removing the cover. To check, measure for zero
voltage at the DC terminals UDC+ and UDC-.
WARNING! Even when the power is switched off from the input
terminals of the ACH550, there may be dangerous voltage (from
external sources) on the terminals of the relay outputs
RO1…RO3 and, if the relay extension board is included in the
installation, RO4…RO6, as well as terminals X1:19 to X1:27 on
the control board.

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