ACH550-UH User’s Manual
3
Safety
Safety
Warning! The ACH550 adjustable speed AC drive should ONLY be installed by
a qualified electrician.
Warning! Even when the motor is stopped, dangerous voltage is present at the
Power Circuit terminals U1, V1, W1 and U2, V2, W2 and, where present, UDC+,
UDC-, BRK+ and BRK-.
Warning! Dangerous voltage is present when input power is connected. After
disconnecting the supply, wait at least 5 minutes (to let the intermediate circuit
capacitors discharge) before removing the cover.
Warning! Even when power is removed from the input terminals of the
ACH550, there may be dangerous voltage (from external sources) on the
terminals of the relay outputs R01
…
R03.
Warning! When the control terminals of two or more drive units are connected
in parallel, the auxiliary voltage for these control connections must be taken
from a single source which can either be one of the units or an external
supply.
Warning! The ACH550-UH is not a field repairable unit. Never attempt to repair
a malfunctioning unit; contact the factory or your local Authorized Service
Center for replacement.
Warning! The ACH550 will start up automatically after an input voltage
interruption if the external run command is on.
Warning! The heat sink may reach a high temperature. See "Technical Data" on
page 225.
Warning! If the drive will be used in a floating network, remove screws at EM1
and EM3 (Frame size R1
…
R4), or F1 and F2 (Frame size R5 or R6). See
diagrams on page 14 and page 15 respectively.
Note!
For more technical information, contact the factory or your local ABB sales
representative.