Inovance MD500T75G - Page 293

MD500 User Manual 12. Troubleshooting

Operating Panel Display Fault Name
Motor speed
Motor
r
forwar
d
Overcurrent at constant speed
Cause Possible Solution
The output circuit is grounded
or short circuited.
Eliminate external faults, and check whether short-
circuit occurs on the motor or contactor.
The control mode is SVC or CLVC but
motor auto-tuning is not performed.
Set the motor parameters according to the motor
nameplate and perform motor auto-tuning.
The acceleration time is too short. Increase the acceleration time.
The overcurrent stall prevention
parameters are set improperly.
(QVXUHWKDWWKHRYHUFXUUHQWVWDOOSUHYHQWLRQIXQFWLRQLVHQDEOHG) 
The setting of overcurrent stall prevention level (F3-
LVWRRODUJH$GMXVWLWEHWZHHQDQG
The setting of overcurrent stall prevention gain (F3-
LVWRRVPDOO$GMXVWLWEHWZHHQDQG
The AC drive size is small. If the running current exceeds the rated motor current or rated output
current of the AC drive during stable running, replace a large drive.
The AC drive suffers external interference. View the historical fault records. If the current value is far from the
RYHUFXUUHQWOHYHOÀQGWKHLQWHUIHUHQFHVRXUFH,IH[WHUQDOLQWHUIHUHQFH
does not exists, it is the drive board or hall device problem.
Operating Panel Display Fault Name
Overvoltage during acceleration
Cause Possible Solution
The input voltage is too high. $GMXVWWKHYROWDJHWRQRUPDOUDQJH
An external force drives the
motor during acceleration.
Cancel the external force or install a regen resistor.
The overvoltage stall prevention
parameters are set improperly.
Ensure that the overvoltage stall prevention function is enabled (F3-23 = 1).
The setting of overvoltage stall prevention voltage (F3-
LVWRRODUJH$GMXVWLWEHWZHHQ9DQG9
The setting of overvoltage stall prevention frequency gain (F3-
LVWRRVPDOO$GMXVWLWEHWZHHQDQG
The braking unit and regen
resistor are not installed.
Install the braking unit and regen resistor.
Operating Panel Display Fault Name
Overvoltage during deceleration
Cause Possible Solution
The overvoltage stall prevention
parameters are set improperly.
Ensure that the overvoltage stall prevention function is enabled (F3-23 = 1).
The setting of overvoltage stall prevention voltage (F3-
LVWRRODUJH$GMXVWLWEHWZHHQ9DQG9
The setting of overvoltage stall prevention frequency gain (F3-
LVWRRVPDOO$GMXVWLWEHWZHHQDQG
An external force drives the
motor during deceleration.
Cancel the external force or install the regen resistor.
The deceleration time is too short. Increase the deceleration time.
The braking unit and regen
resistor are not installed.
Install the braking unit and regen resistor.
efesotomasyon.com