Omron SYSDRIVE 3G3EV SERIES, User Manual

Page: 62 / 88

5-5
Data
display
Cause and action Description
uU1
Main circuit undervoltage (UV1)
The DC voltage of the main circuit
dropped below the specified level.
3G3EV-A2
jjj
: Approximately 200 V
or less
3G3EV-AB
jjj
: Approximately
160 V or less
3G3EV-A4
jjj
-CUE: Approximately
400 V or less
•
The input power voltage dropped.
•
Open-phase occurred.
•
An instantaneous power interruption
occurred.
•
Check the power voltage.
•
Check the power input line for discon-
nection.
•
Check the terminal block screws for
looseness.
uU2
Control power supply fault (UV2)
A voltage fault occurred in control
power supply.
•
Turn the power off, then on.
•
If this problem persists, replace the
Unit.
%h
Radiation fin overheated (OH)
The radiation fin overheated because
of ambient temperature rise or Inverter
temperature rise due to overload.
•
Load is excessive.
Reduce the load.
•
The V/f characteristics are inappropri-
ate.
Reset constant Nos. 24 to 26.
•
The acceleration/deceleration time or
cycle time is too short.
Increase the acceleration/de-
celeration time or cycle time.
•
The ambient temperature is too high.
Install a cooling fan or air con-
ditioner.
Operation
Chapter 5