Faults And Alarms - Omron VS mini J7 Manuel Rapide

Input/Output terminal status
Input Terminal Status
Output Terminal Status

7. Faults and Alarms

Fault Display Fault name and meaning
OC Overcurrent
Output current is higher than 250% of
inverter rated current.
OV Overvoltage
DC bus voltage has exceeded
detection level.
uV1 Main circuit undervoltage
DC bus voltage is below detection
level.
OH Unit overheated
Temperature inside the inverter has
exceeded 110°C.
OL1 Motor overload
The inverter is protecting the motor
from overload based on an internal IT
calculation using n036 setting.
*1
EF External fault
An external fault has been input.
SER Sequence error
(flashing) Sequence input when inverter
running.
bb External baseblock
(flashing) An external baseblock command has
been input.
EF Sequence error has occured
(flashing)
*1 Refer to user's manual for full fault code listings
1: Terminal S1 is "closed"
1: Terminal S2 is "closed"
1: Terminal S3 is "closed"
1: Terminal S4 is "closed"
1: Terminal S5 is "closed"
Not Used
1: Terminal MA-MC is "closed"
Not Used
Possible cause and remedy
Check output for short circuit or ground fault.
The Load is too large, reduce it ore use larger Inverter.
Check motor FLA rating compared to inverter and V/F setting.
Load inertia is too large and the motor is regenerating.
Increase deceleration time (n020 or n022).
Connect an external braking resistor and set n092 to 1.
Check braking resistor and wiring.
Check mains power supply voltage and connections.
Check correct supply for Inverter being used.
Monitor for mains dips or interruptions.
Refer to manual for installation guidelines and recommendations.
Check cooling fan (if fitted).
Check V/F characteristic ore reduce Carrier frequency.
Check and reduce the load.
Check V/F characteristic (V
Increase the running speed of the motor.
Increase acceleration/decelleration times.
Check your control terminal wiring.
A multi-functional digital input has been set to 3 or 4.
Run signal must be removed before this can be reset.
Inverter must be stopped when Local/Remote switching attempted.
Inverter must be stopped when Comms/Remote switching
attempted
Check your control terminal wiring.
A multi-functional digital input has been set to 12 or 13.
Forward and reverse run signal have been applied simultaneously.
and F ).
max max