YASKAWA E-7-Series SGD7S Product Manual page 18

 Troubleshooting Precautions
 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.
 When an alarm occurs, remove the cause of the alarm and ensure safety. Then reset the alarm
or turn the power supply OFF and ON again to restart operation.
There is a risk of injury or machine damage.
 If the Servo ON signal is input to the SERVOPACK and an alarm is reset, the Servomotor may
suddenly restart operation. Confirm that the servo is OFF and ensure safety before you reset an
alarm.
There is a risk of injury or machine damage.
 Always insert a magnetic contactor in the line between the main circuit power supply and the
main circuit power supply terminals on the SERVOPACK so that the power supply can be shut
OFF at the main circuit power supply.
If a magnetic contactor is not connected when the SERVOPACK fails, a large current may flow,
possibly resulting in fire.
 If an alarm occurs, shut OFF the main circuit power supply.
There is a risk of fire due to a regenerative resistor overheating as the result of regenerative transis-
tor failure.
 Install a ground fault detector against overloads and short-circuiting or install a molded-case
circuit breaker combined with a ground fault detector.
There is a risk of SERVOPACK failure or fire if a ground fault occurs.
 The holding brake on a Servomotor will not ensure safety if there is the possibility that an exter-
nal force (including gravity) may move the current position and create a hazardous situation
when power is interrupted or an error occurs. If an external force may cause movement, install
an external braking mechanism that ensures safety.
 Disposal Precautions
 When disposing of the product, treat it as ordinary industrial waste. However, local ordinances
and national laws must be observed. Implement all labeling and warnings as a final product as
required.
 General Precautions
 Figures provided in this document are typical examples or conceptual representations. There
may be differences between them and actual wiring, circuits, and products.
 The products shown in illustrations in this document are sometimes shown without covers or
protective guards. Always replace all covers and protective guards before you use the product.
 If you need a new copy of this document because it has been lost or damaged, contact your
nearest Yaskawa representative or one of the offices listed on the back of this document.
 This document is subject to change without notice for product improvements, specifications
changes, and improvements to the manual itself.
We will update the document number of the document and issue revisions when changes are
made.
 Any and all quality guarantees provided by Yaskawa are null and void if the customer modifies
the product in any way. Yaskawa disavows any responsibility for damages or losses that are
caused by modified products.
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WARNING
CAUTION