K&R GT600-4T132G, User Manual

Page: 299 / 362

10. Troubleshooting
11
- 297 -
Operating Panel Display Fault Name
Overvoltage at constant speed
Cause Possible Solution
The overvoltage stall prevention
parameters are set improperly. Ensure that the voltage limit function is enabled (F3-23 = 1).
The setting of voltage limit (F3-22) is too large. Adjust it
between 700 V and 770 V.
The setting of frequency gain for voltage limit (F3-24) is too
small. Adjust it between 30 and 50.
The setting of frequency rise threshold during voltage limit (F3-
26) is too small. Adjust it between 5 Hz and 20 Hz.
An external force drives motor during
running. Cancel the external force or install a braking resistor
Operating Panel Display Fault Name
Pre-charge resistor fault
Cause Possible Solution
Bus voltage fluctuates around
undervoltage threshold continuously.
Contact the agent or K&R.
Operating Panel Display Fault Name
Undervoltage
Cause Possible Solution
Instantaneous power failure occurs Enable the power dip ride through function (F9-
59 ≠ 0).
The AC drive's input voltage is not
within the permissible range. Adjust the voltage to normal range.
The bus voltage is abnormal. Contact the agent or K&R.
The rectifier bridge, the buffer
resistor, the drive board or the
control board are abnormal. Contact the agent or K&R.
Operating Panel Display Fault Name
AC drive overload
Cause Possible Solution
Load is too heavy or locked-rotor
occurs on motor.
Reduce load or check motor and mechanical conditions.
The AC drive power class is small. Replace a drive of larger power class.
Operating Panel Display Fault Name
Motor overload
Cause Possible Solution
F9-01 (Motor overload protection
gain) is set improperly.
Set F9-01 correctly.
Load is too heavy or locked-rotor
occurs on motor. Reduce load or check motor and mechanical conditions.