Section Safety - YASKAWA U1000 Series Technical Manual

7.1 Section Safety

7.1 Section Safety
Do not connect or disconnect wiring while the power is on.
Failure to comply could result in death or serious injury.
Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power
supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent
electric shock, wait for at least the time specified on the warning label; after all indicators are OFF, measure for unsafe
voltages to confirm the drive is safe prior to servicing.
Never connect or disconnect wiring, remove connectors or option cards, or replace the cooling fan, and air filter
while the power is on.
Failure to comply will result in death or serious injury.
Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power
supply is turned off.
Do not operate equipment with covers removed.
Failure to comply could result in death or serious injury.
The diagrams in this section may show drives without covers or safety shields to show details. Be sure to reinstall
covers or shields before operating the drives and run the drives according to the instructions described in this manual.
Always ground the motor-side grounding terminal.
Improper equipment grounding could result in death or serious injury by contacting the motor case.
Do not remove covers or touch circuit boards while the power is on.
Failure to comply could result in death or serious injury.
Do not allow unqualified personnel to perform work on the drive.
Failure to comply could result in death or serious injury.
Installation, maintenance, inspection, and servicing must be performed only by authorized personnel familiar with
installation, adjustment, and maintenance of AC drives.
Do not perform work on the drive while wearing loose clothing, jewelry or without eye protection.
Failure to comply could result in death or serious injury.
Remove all metal objects such as watches and rings, secure loose clothing, and wear eye protection before beginning
work on the drive.
Do not touch any terminals before the capacitors have fully discharged.
Failure to comply could result in death or serious injury.
Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power
supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent
electric shock, wait for at least the time specified on the warning label; after all indicators are OFF, measure the DC bus
voltage level to confirm it has reached a safe level.
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DANGER
Electrical Shock Hazard
W ARNING
Electrical Shock Hazard
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual