ICON500 high performance vector control frequency inverter user
manual
Chapter6 Fault diagnosis and
solutions
-
91-
Fault Name
Display
Possible Causes
Solutions
Over current
during
deceleration
Er.OC2
1: The output circuit is grounded or
short circuited.
2: Motor auto-tuning is not performed.
3: The deceleration time is too short.
4: The voltage is too low.
5: A sudden load is added during
deceleration.
6: The braking unit and braking
resistor are not installed
1: Eliminate external faults.
2: Perform the motor
auto-tuning.
3: Increase the decelerationtime.
4: Adjust the voltage to normal
range.
5: Remove the added load.
6: Install the braking unit
Andbraking resistor.
Over current
at constant
speed
Er.OC3
1: The output circuit is grounded or
short circuited.
2: Motor auto-tuning is notperformed.
3: The voltage is too low.
4: A sudden load is added during
operation.
5: The frequency inverter model is of
too small power class.
1:Eliminateexternalfaults.
2: Perform themotorauto-tuning.
3:AdjustThevoltagetonormalrange.
4: Remove the addedload.
5: Select afrequency
Inverterofhigher powerclass.
Overvoltage
during
acceleration
Er.OU1
1: The input voltage is too high.
2: An external force drives the motor
during acceleration.
3: The acceleration time is too short.
4: The braking unit and braking
resistor are not installed.
1:AdjustThevoltagetonormalrange.
2: Cancel theexternal forceor
install a braking resistor.
3: Increasethe accelerationtime.
4: Install thebraking unit
Andbraking resistor.
Overvoltage
during
deceleration
Er.OU2
1: The input voltage is too high.
2: An external force drives the motor
during deceleration.
3: The deceleration time is too short.
4: The braking unit and braking
resistor are not installed.
1:AdjustThevoltagetonormal
Range.
2: Cancel theexternal forceor
install thebraking resistor.
3: Increasethe decelerationtime.
4: Install thebraking unit
Andbraking resistor
Overvoltage
at constant
speed
Er.OU3
1: The input voltage is too high.
2: An external force drives the motor
during deceleration.
1:AdjustThevoltagetonormalrange.
2: Cancel theexternal forceor
install thebraking resistor.
Low voltage
Er.LU1
1: Instantaneous power failure occurs
on the input power supply.
2: The frequency inverter's input
voltage is not within the allowable
range.
3: The DC bus voltage is abnormal.
4: The rectifier bridge and buffer
resistor are faulty.
5: The drive board is faulty.
6: The main control board is faulty.
1: Reset thefault.
2:Adjust
Thevoltagetonormalrange.
3: Ask for technical support
4: Ask for technical support
5: Ask for technical support
6: Ask for technical support