4.1 Section Safety
120 YASKAWA SIEPC71061753C GA500 Technical Manual
4.1 Section Safety
DANGER
Electrical Shock Hazard
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, measure for dangerous voltages to make sure that the drive is safe.
If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock.
WARNING
Electrical Shock Hazard
Do not operate the drive when covers are missing. Replace covers and shields before you
operate the drive. Use the drive only as specified by the instructions.
Some figures in this section include drives without covers or safety shields to more clearly show the inside of the
drive. If covers or safety shields are missing from the drive, it can cause serious injury or death.
Do not remove covers or touch circuit boards while the drive is energized.
If you touch the internal components of an energized drive, it can cause serious injury or death.
Sudden Movement Hazard
When you use a mechanical holding brake with the drive in a lifting application, you must close
the brake if an input terminal triggers the Baseblock command to stop drive output.
If you enter the baseblock command, the motor will suddenly coast and the load will slip, which can cause
serious injury or death.
When you use the drive in a lifting application, you must also install external safety circuitry.
The drive does not have protection against accidental load drops in lifting applications. Install
electrical and/or mechanical safety circuit mechanisms that are isolated from the drive circuitry.
If you do not use external safety circuitry, the drive could drop the load and cause serious injury or death.
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