Omron SYSDRIVE 3G3EV SERIES, User Manual

Page: 60 / 88

5-3
H
Data Display and Action to be Taken when Warning Status
Arises
The ALARM indicator flashes when warning status arises. The data display section also
flashes.
When warning status arises, no error code is output.
Eliminating the cause recovers the system automatically.
Data
display
Description Action
ef
flashing
Simultaneous input of forward and
reverse rotation commands
Forward and reverse rotation
commands were simultaneously input
for 0.5 second or more. The Inverter
decelerates and stops the motor.
•
Review the sequence.
uU
flashing
Main circuit undervoltage (UV)
The DC voltage of the main circuit
dropped below the low-voltage
detection level when the Inverter was
stopped.
•
Check the power voltage.
•
Check the power input line for discon-
nection.
•
Check the terminal block screws for
looseness.
%U
flashing
Main circuit overvoltage (OV)
The DC voltage of the main circuit
exceeded the overvoltage detection
level when the Inverter was stopped.
•
Check the power voltage.
%h
flashing
Radiation fin overheated (OH)
The radiation fin overheated when the
Inverter was stopped.
•
Check the ambient temperature.
•
Install a cooling fan or air conditioner.
flashing
Digital Operator stopped (STP)
The STOP/RESET Key on the Digital
Operator was pressed while the
Inverter was being operated using
control circuit terminals SF and SR.
The Inverter decelerates and stops
the motor.
•
Open both SF and SR.
Operation
Chapter 5