Troubleshooting Precautions - YASKAWA Sigma-7 Series Product Manual

 Wait for at least six minutes after turning OFF the power supply (with a SERVOPACK for a 100-
VAC power supply input, wait for at least nine minutes) and then make sure that the CHARGE
indicator is not lit before starting wiring or inspection work. Do not touch the power supply ter-
minals while the CHARGE lamp is lit because high voltage may still remain in the SERVOPACK
even after turning OFF the power supply.
There is a risk of electric shock.
 Before you replace a SERVOPACK, back up the settings of the SERVOPACK parameters. Copy
the backed up parameter settings to the new SERVOPACK and confirm that they were copied
correctly.
If you do not copy backed up parameter settings or if the copy operation is not completed correctly,
normal operation may not be possible, possibly resulting in machine or equipment damage.
 Discharge all static electricity from your body before you operate any of the buttons or switches
inside the front cover of the SERVOPACK.
There is a risk of equipment damage.
 Troubleshooting Precautions
 If the safety device (molded-case circuit breaker or fuse) installed in the power supply line oper-
ates, remove the cause before you supply power to the SERVOPACK again. If necessary, repair
or replace the SERVOPACK, check the wiring, and remove the factor that caused the safety
device to operate.
There is a risk of fire, electric shock, or injury.
 The product may suddenly start to operate when the power supply is recovered after a momen-
tary power interruption. Design the machine to ensure human safety when operation restarts.
There is a risk of injury.
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CAUTION
NOTICE
DANGER
WARNING