Danfoss VFD500 Series Manual page 115

VFD500 high performance vector control frequency inverter user manual
Fault Name
Over current
at constant
speed
Overvoltage
during
acceleration
Overvoltage
during
deceleration
Overvoltage
at constant
speed
Faul
Disp
t
lay
cod
e
1: The output circuit is grounded
or
short circuited.
2: Motor auto-tuning is
Er.O
notperformed.
4
C3
3: The voltage is too low.
4: A sudden load is added during
operation.
5: The frequency inverter model
is of
1:The input voltage is too high
2:The surge voltage is mixed in
the input power supply.
Er.O 3: There is an external force to
5 U1 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.O 3: there is an external force to
6 U2 drive the motor to run, or the
brake type load is too heavy
4:the decceleration 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.O 3: There is an external force to
7 U3 drive the motor to run, or the
brake type load is too heavy
4:The acceleration or
decceleration time is too short
5:The motor is shorted to ground
Chapter6 Fault diagnosis and solutions
Possible Causes
112
Solutions
1:Eliminate external
faults.
2: Perform the motor
auto-tuning.
3:Adjust The voltage to
normal range.
4: Remove the
addedload.
5: Select a frequency
Inverter of higher power
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
decceleration 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
decceleration time