Validating The Safety Functions; On-Load Checks; Switching The Supply Unit Off; Disconnecting And Temporary Grounding The Drive - ABB ACS880-304LC Series Hardware Manual

78 Start-up
Action
Switch the Run enable and Start signals at digital input DI2 on (1) to start the operation of the
supply unit.
Turn the operating switch [S21] on the cabinet door to ENABLE/RUN (1) position.
Run enable starts the supply unit power up sequence. After the program has stepped through
it (approximately 3 seconds), the drive DC link is charged, the main contactor/ is closed and the
supply unit is in operation and ready to the supply inverters.
Turn the operating switch [S21] to on (1) position to activate the Run enable signal and to close
the main contactor [Q2] / main breaker [Q1].

Validating the safety functions

￭
Action
Validate the operation of safety functions (for example, emergency stop).
WARNING!
The safety functions are not safe before they are validated according to the instruc-
tions. See the function-specific manual for the validation tasks.
Safety functions are optional. See the function-specific manual for the validation tasks.

On-load checks

￭
Action
Make sure that the cooling operates properly (no overtemperature related warnings or faults).

Switching the supply unit off

1. Stop the motors connected to inverter units.
2. Turn the operating switch [S21] to the OFF (0) position to deactivate the Run
enable signal and to switch off the main disconnecting device ().
ENABLE / RUN
0-1

Disconnecting and temporary grounding the drive

See Electrical safety precautions (page 56).