Chapter 6 Fault Diagnosis And Solution - Veikong VFD500 Series User Manual

VFD500 high performance vector control frequency inverter user manual
Fault
Fault Name
code
Over
current
4
at constant
speed
Overvoltage
during 5
acceleration
Overvoltage
during 6
deceleration
Overvoltage
at constant 7
speed
Possible Causes
Display
1: The output circuit is grounded or
short circuited.
2: Motor auto-tuning is not
performed.
Er.OC3
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:The surge voltage is mixed in
the input power supply.
3: There is an external force to
Er.OU1
drive the motor to run, or the brake
type load is too heavy
4:The acceleration time is too
short
5:The motor is shorted to ground
1:The input voltage is too high
2:The surge voltage is mixed in
the input power supply.
Er.OU2
3: there is an external force to
drive the motor to run, or the brake
type load is too heavy
4:the deceleration time is too short
5:the motor is shorted to ground
1:The input voltage is too high
2:The surge voltage is mixed in
the input power supply.
3: There is an external force to
Er.OU3
drive the motor to run, or the brake
type load is too heavy
4:The acceleration or deceleration
time is too short
5:The motor is shorted to ground
Chapter6 Fault diagnosis and solutions
1:Eliminate external faults.
2: Perform the motor auto-tuning.
3:Adjust The voltage to normal
range.
4: Remove the added load.
5: Select a frequency
Inverter of higher power class.
1:The power supply voltage is
reduced to the normal range
2:Install DC reactor
3:Cancel the external force of the
draggable motor or install the
brake unit
4: Increase the acceleration time
5:Eliminate the part of the
ground short circuit
1:the power supply voltage is
reduced to the normal range
2:install DC reactor
3:Cancel the external force of the
draggable motor or install the
brake unit
4: increase the deceleration time
5:eliminate the part of the ground
1:the power supply voltage is
reduced to the normal range
2:install DC reactor
3:Cancel the external force of the
draggable motor or install the
brake unit
4: increase the acceleration or
deceleration time
5:eliminate the part of the ground
- 125-
Solutions