Safety Precautions - Omron Q2A Series Technical Manual

8.1 Safety Precautions

8.1

Safety Precautions

Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a
minimum. The internal capacitor stays charged after the drive is de-energized. The charge
indicator LED extinguishes when the DC bus voltage decreases below 50 Vdc. When all
indicators are OFF, remove the covers before measuring for dangerous voltages to make sure
that the drive is safe.
Failure to obey will cause death or serious injury.
While the drive is ON, never attempt to change any wiring, disconnect any option cards or
connectors, or replace the cooling fan. Before performing any repairs, shut OFF the power
supply to the drive and verify that there is no residual voltage in the unit.
Failure to do so may result in serious electric shock.
A motor will continue to run even when the power supply to the drive has been turned OFF. PM
motors generate induced voltage to the terminal of the motor even when the power supply to
the drive has been switched OFF.
Failure to comply could result in death or serious injury.
Do not operate equipment when covers are missing. Some figures in this section include drives
without covers or safety shields to more clearly show the inside of the drive. Replace covers
and shields before operation. Use drives only as specified by the instructions.
Failure to obey can cause death or serious injury.
Always ground the motor-side grounding terminal.
Contacting the motor case can cause death or serious injury from incorrect equipment grounding.
Only let authorized persons install, wire, maintain, examine, replace parts, and repair the drive.
Failure to obey can cause death or serious injury.
Do not work on the drive or around the drive while wearing loose clothing or jewelry. Tighten
loose clothing and remove all metal objects such as watches or rings.
Failure to obey can cause death or serious injury.
Tighten all terminal screws to the correct tightening torque.
Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect
connections can also cause death or serious injury from fire.
Do not use the main circuit power supply (Overcurrent Category III) at incorrect voltages. Make
sure that the drive rated voltage aligns with the power supply voltage before energizing the
drive.
Failure to obey can cause death or serious injury.
Do not put flammable or combustible materials on top of the drive and do not install the drive
near flammable or combustible materials. Attach the drive to metal or other noncombustible
material.
Failure to obey can cause death or serious injury.
Do not touch a hot drive heatsink. De-energize the drive, wait 15 minutes minimum, and make
sure that the heatsink is cool to replace the cooling fans.
Failure to obey can cause minor to moderate injury.
304
DANGER
Electrical Shock Hazard
WARNING
Electrical Shock Hazard
Fire Hazard
CAUTION
Burn Hazard
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual