Veikong VFD500 Series Operation Manual page 94

VFD500 high performance vector control frequency inverter user manual
Fault Name Display
Over current
during Er.OC2
deceleration
Over current
at constant Er.OC3
speed
Overvoltage
during Er.OU1
acceleration
Overvoltage
during Er.OU2
deceleration
Overvoltage
at constant Er.OU3
speed
Low voltage Er.LU1
Possible Causes
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: 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: 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: 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: The input voltage is too high.
2: An external force drives the motor
during deceleration.
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.
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Chapter6 Fault diagnosis and solutions
Solutions
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.
1:Eliminateexternalfaults.
2: Perform themotorauto-tuning.
3:AdjustThevoltagetonormalrange.
4: Remove the addedload.
5: Select afrequency
Inverterofhigher powerclass.
1:AdjustThevoltagetonormalrange.
2: Cancel theexternal forceor
install a braking resistor.
3: Increasethe accelerationtime.
4: Install thebraking unit
Andbraking resistor.
1:AdjustThevoltagetonormal
Range.
2: Cancel theexternal forceor
install thebraking resistor.
3: Increasethe decelerationtime.
4: Install thebraking unit
Andbraking resistor
1:AdjustThevoltagetonormalrange.
2: Cancel theexternal forceor
install thebraking resistor.
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