Installation manual

19
Position of the charging LED
Before working on the drive, turn it off, wait until the red capacitor charging LED has gone out, then measure the DC bus voltage.
Position of the capacitor charging LED
Procedure for measuring the DC bus voltage
The DC bus voltage can exceed 1,000 V c. Use a properly rated voltage sensing device when performing this procedure. To measure
the
DC bus voltage:
1 Disconnect the drive power supply.
2 Wait 15 minutes to allow the DC bus capacitors to discharge.
3 Measure the voltage of the DC bus between the PA/+ and PC/- terminals to check whether the voltage is less than 45 V c. See page 26
for the arrangement of the power terminals.
4 If the DC bus capacitors have not discharged completely, contact your local Schneider Electric representative (do not repair or operate
the drive).
ATV71H 037M3 to D15M3X and
ATV71H 075N4 to D18N4
ATV71H D18M3 to D45M3X,
ATV71H D22N4 to D75N4,
and ATV71H U22Y to D90Y
Red LED indicating that the DC bus is turned on
DANGER
RISK OF ELECTRIC SHOCK
Read and understand the instructions on page 5 before performing this procedure.
Failure to follow this instruction will result in death or serious injury.