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10-4
LED display
Description
Cause
Possible solutions
Ud-C
Under Current
Output under
current detection
Output current < Output under current
detection level.
Set level according to
application.
OL1
Motor overload
Internal motor
overload protection
tripped, active when
protection curve
08-05 = xxx1.
Voltage setting V/F mode too high, resulting in
over-excitation of the motor.
Motor rated current (02-01) set incorrectly.
Load too heavy.
Check V/f curve.
Check motor rated current
Check and reduce motor load,
check and operation duty cycle.
OL2
Motor overload
Internal motor
overload protection
tripped, active when
protection curve
08-05 = xxx1.
Voltage setting V/F mode too high, resulting in
over-excitation of the motor.
Motor rated current (02-01) set incorrectly.
Load too heavy.
Check V/f curve.
Check motor rated current
Check and reduce motor load,
check and operation duty cycle.
OL3
Over Torque
Over torque
Motor load to big
Parameter 8-15, 8-16 not set correctly
Increase inverter size
Adjust parameter 08-15, 08-16.
LV
low voltage
during operation
Voltage too low
during operation
Power voltage too low
Input power voltage fluctuates too much
1.Improve power quality
2.Consider adding a reactor at the
power input side
OVSP
Over Speed
Motor speed too
high
Motor rotation speed greatly exceeds set
speed
1.Motor load too big
2.Check set speed
LIFE 1
Inrush current
suppression circuit
life expectancy
alarm
Inrush current suppression circuit
maintenance required
1. Consult factory
LIFE 2
Control Circuit
Capacitor life
expectancy alarm
Control Circuit Capacitors maintenance
required
1. Consult factory
LIFE 3
Main Circuit
Capacitor life
expectancy alarm
DC-Bus Capacitors maintenance required
1. Consult factory