6 Troubleshooting
- 75 -
Fault Name
Operating
Panel
Display
Cause
Possible Solution
Overcurrent at
constant speed
E 04.00
Ground fault or
short circuit exists in
the output circuit.
Check whether short-circuit occurs on the
motor, motor cable, or contactor.
The control mode
is SVC or FVC but
motor auto-tuning is
not performed.
Set motor parameters according to motor
nameplate and perform motor auto-tuning.
The overcurrent
stall prevention
parameters are set
improperly.
Ensure that current limit is enabled (F3-19 = 1).
The setting of F3-18 (Current limit level) is too
large. Adjust it between 120% and 150%.
The setting of F3-20 (Current limit gain) is too
small. Adjust it between 20 and 40.
The drive power
class is small.
If the output current exceeds the rated motor
current or rated output current of the drive
during stable running, replace a drive of larger
power class.
The drive
suffers external
interference.
View historical fault records. If the current
value is far from the overcurrent level, find the
interference source. If an external interference
does not exist, the drive board or hall device is
faulty.
Overvoltage
during
acceleration
E 05.00
Input voltage is too
high.
Adjust the input voltage to normal range.
An external force
drives the motor
during acceleration.
Cancel the external force or install a braking
resistor.
The setting of F3-26 (Frequency rise threshold
during voltage limit) is too small. Adjust it
between 5 Hz and 15 Hz.
The overvoltage
stall prevention
parameters are set
improperly.
Ensure that the voltage limit function is
enabled (F3-23 = 1).
The setting of F3-22 (Voltage limit) is too large.
Adjust it between 700 V and 770 V.
The setting of F3-24 (Frequency gain for
voltage limit) is too small. Adjust it between 30
and 50.
The braking unit and
braking resistor are
not installed.
Install the braking unit and braking resistor.
Acceleration time is
too short.
Increase acceleration time.
