When Tripping Occurs - Hitachi NES1-004SB Quick Reference Manual

6.8 When tripping occurs

During operation, If any abnormalities (overcurrent, overload, etc.) is detected, and in order to protect the
motor and inverter, the inverter output is shut off to the motor. ALARM lamp is lit at the same time. Then, it
displays an error code. This chain of operations is called the trip. Motor is in free-run mode due to trip. To
investigate the cause of the error from the error code that is displayed. And remove the cause of the error.
During the trip, a run command isn't accepted. Press the [RUN/STOP/RESET]key to cancel the trip. If
reset is assigned to an intelligent input terminal, please reset input "ON to OFF". However, depending on
the cause of trip may not be able to cancel the trip by reset. In this case, the power is turned off and turned
on again. Before reset execution please review the various input signals such as operation command.
Please note that If operation command signal remains ON, restart immediately after the reset operation
normal operation
Trip
Reset
RUN
STOP
RESET
anomalous
→
display example
Refer to Chapter 9 for more information on error
* determine the causes, error cause removal,
Reset, after checking the various signals.
or
RS terminal input
ON→OFF
anomaly detection
.
6 - 19
Chapter 6 Operation
M
shut off
free-run
M
M