148 Start-up
Start-up procedure
Tasks
Safety
WARNING! Obey the safety instructions during the start-up procedure. See Safety
instructions for ACS880 multidrive cabinets and modules (3AUA0000102301 [English]).
Only qualified electricians are allowed to start-up the drive.
Checks/Settings with no voltage connected
WARNING! Ensure that the disconnector of the supply transformer is locked to the off (0)
position, that means no voltage is, or can not, be connected to drive inadvertently.
Check that the main switch-disconnector [Q1.1] is switched off, or the main circuit breaker [Q1] is
cranked out.
Check the mechanical and electrical installation. See Installation checklist on page 145.
Check the settings of breakers/switches in the auxiliary circuits. See delivery-specific circuit
diagrams.
If time relays, or relays with delayed make contact or break contact are used in emergency stop
circuits, check the relay time settings. See delivery-specific circuit diagrams and safety function
specific documentation (if applicable).
Disconnect the unfinished or unchecked 230 V AC cables that lead from the terminal blocks to the
outside of the equipment.
Check that both circuits of STO terminals on the supply control unit are closed as shown in Default
I/O connection diagram of the supply unit on page 340 (IN1 and IN2 must be connected to OUT).
The supply unit cannot start is either circuit is open. Refer to the wiring diagrams delivered with the
drive. See chapters Control units of the drive (page 337) and The Safe torque off function (page
351).
Check that STO terminals on the inverter control unit are wired as shown in Default I/O connection
diagram of the inverter unit on page 342. Refer to the wiring diagrams delivered with the drive. See
chapters Control units of the drive (page 337) and The Safe torque off function (page 351).
Check that the Safe torque off circuit is wired from the STO OUT terminal block of the inverter
control unit [A51] to all inverter modules.
Powering up the auxiliary circuit of the drive
Make sure that it is safe to connect voltage. Ensure that:
• nobody is working on the unit or circuits that are wired from outside into the cabinets.
• covers of the motor terminal boxes are on.
Close the circuit breakers supplying the auxiliary circuits.
Close the cabinet doors.
Close the main breaker of the supply transformer.
Switch on the auxiliary voltage switch [Q21].
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