K&R GT600-4T132G User Manual page 299

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