Section Safety - YASKAWA L1000A Technical Manual

4.1 Section Safety

4.1 Section Safety
Do not change wiring, remove covers, connectors or options cards, or attempt to service the drive with power
applied to the drive.
Disconnect all power to the drive, and lock out the power source. After shutting off the power wait for at least the
amount of time specified on the drive front cover safety label. Measure the DC bus voltage for unsafe voltages to
confirm safe level before servicing to prevent electric shock The internal capacitor remains charged even after the
power supply is turned off. Failure to comply will result in serious injury or death from electric shock.
Do not perform elevator test operations or drive setup when the elevator is occupied.
The elevator car may not stop properly during test operation resulting in serious injury to personnel. Additionally,
ensure these parameters are set correctly and tested before operating an occupied elevator:
• parameter o1-20 (Traction Sheave Diameter)
• parameter S5-11 (Deceleration Distance), or
• parameter S5-12 (Stop Distance)
Use the Initial Pole Search Status Signal (H2- = 61) to interlock the brake to ensure the brake is not released
before the Initial Magnetic Pole Search is completed.
Failure to comply may cause inadvertent elevator movement resulting in serious injury.
This safety message is applicable under these conditions:
-When applying a PM motor, with an external brake sequence, and the PG-F3 option is not being used.
Ensure all personnel are clear of the motor and elevator before Auto-Tuning.
The motor or equipment may suddenly rotate during the Auto-Tuning process, which may result in serious personal
injury or death.
When a drive is running a PM motor, voltage continues to be generated at the motor terminals after the drive is
shut off while the motor coasts to stop.
Take the precautions described below to prevent shock and injury:
• In applications where the machine can still rotate even though the drive has fully stopped a load, install a switch to
the drive output side to disconnect the motor and the drive.
• Do not allow an external force to rotate the motor beyond the maximum allowable speed or to rotate the motor when
the drive has been shut off.
• Wait for at least the time specified on the warning label after opening the load switch on the output side before
inspecting the drive or performing any maintenance.
• Do not open and close the load switch while the motor is running, as this can damage the drive.
• If the motor is coasting, make sure the power to the drive is turned on and the drive output has completely stopped
before closing the load switch.
90
DANGER
Electrical Shock Hazard
W ARNING
Sudden movement Hazard
Electrical Shock Hazard
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual