Unitronics UMI-B1 UL Series User Manual

UMI-B1 UL Series Inverter Fault tracking
104
Fault
code
Fault type
Possible cause
Solutions
7. The overvoltage stall
protection is not open.
interference.
7. Check the setting of
relative function codes.
OV1
Over-voltage
when acceleration
1. The input voltage is
abnormal.
2. There is large energy
feedback.
3. No braking
components.
4. Braking energy is not
open
1. Check the input power
2. Check if the DEC time
of the load is too short or
the inverter starts during
the rotation of the motor
or it needs to increase the
energy consumption
components.
3. Install the braking
components.
4. Check the setting of
relative function codes.
OV2
Over-voltage
when deceleration
OV3
Over-voltage
when constant
speed running
UV
DC bus
Under-voltage
1. The voltage of the
power supply is too low.
2. The overvoltage stall
protection is not open.
1. Check the input power
of the supply line.
2. Check the setting of
relative function codes.
OL1
Motor overload
1. The voltage of the
power supply is too low.
2. The motor setting rated
current is incorrect.
3. The motor stall or load
transients is too strong.
1. Check the power of the
supply line
2. Reset the rated current
of the motor
3. Check the load and
adjust the torque lift
OL2
Inverter overload
1. The acceleration is too
fast
2. Reset the rotating
motor
3. The voltage of the
power supply is too low.
4. The load is too heavy.
5. Close loop vector
control, reverse direction
of the code panel and
long low-speed operation
1. Increase the ACC time
2. Avoid the restarting
after stopping.
3. Check the power of the
supply line
4. Select an inverter with
bigger power.
5. Select a proper motor.
OL3
Electrical overload
The inverter will report
overload pre-alarm
according to the set
value.
Check the load and the
overload pre-alarm point.
SPI
Input phase loss
Phase loss or fluctuation
1. Check input power

Unitronics UMI-B1 UL Series Specifications

General

Brand	Unitronics
Model	UMI-B1 UL Series
Category	Inverter
Language	English