Operation
Chapter 5
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
Description
Action
display
ef
Simultaneous input of forward and • Review the sequence.
reverse rotation commands
flashing
Forward and reverse rotation
commands were simultaneously input
for 0.5 second or more. The Inverter
decelerates and stops the motor.
Main circuit undervoltage (UV)
• Check the power voltage.
uU
flashing
The DC voltage of the main circuit
dropped below the low-voltage
detection level when the Inverter was
stopped.
• Check the power input line for discon-
nection.
• Check the terminal block screws for
looseness.
Main circuit overvoltage (OV)
• Check the power voltage.
%U
flashing
The DC voltage of the main circuit
exceeded the overvoltage detection
level when the Inverter was stopped.
Radiation fin overheated (OH)
• Check the ambient temperature.
%h
flashing
The radiation fin overheated when the
Inverter was stopped.
• Install a cooling fan or air conditioner.
Digital Operator stopped (STP)
• Open both SF and SR.
flashing
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.
5-3
OMRON [ OMRON ELECTRONICS LLC ]
