5. Fault Diagnostic Methods
5-3
5-1-2 Error Messages Displayed on KPVJ-LE01 Digital
Keypad Panel
Displayed Code Description of Failure Solutions
Over current during acceleration;
the output current exceeds three
times the rated current of the Hybrid
servo drive.
Over current during deceleration;
the output current exceeds three
times the rated current of the Hybrid
servo drive.
Over current during constant speed
operation; the output current
exceeds three times the rated
current of the Hybrid servo drive.
Check the connection from U-V-W to the motor for any
improper insulation.
Check if the motor is jammed.
Replace with an AC motor drive with a larger output
capacity.
Over-current when the machine
stops. Malfunction of the current
detection circuit
Return to factory for repair.
The Hybrid servo drive detects short
circuit between the IGBT module’s
upper and lower bridges.
Return to factory for repair.
During acceleration, the Hybrid
servo drive detects over-voltage at
the internal DC side.
During deceleration, the Hybrid
servo drive detects over-voltage at
the internal DC side.
During the constant speed
operation, the Hybrid servo drive
detects over-voltage at the internal
DC side.
230V: DC 450V
460V: DC 900V
Check if the input voltage is within the Hybrid servo
drive’s rated voltage range; and monitor if there is any
voltage surge.
For Hybrid servo drives below 22kW, the Parameter
02-00 can be adjusted for the activation level of the
braking transistor
For Hybrid servo drives above 22kW, adjust the brake
activation level of the braking unit
(For detailed description, please refer to the operation
manual of the braking unit)
Over-voltage when the machine
stops. Malfunction of the voltage
detection circuit
Check if the input voltage is within the Hybrid servo
drive’s rated voltage range; and monitor if there is any
voltage surge.
During acceleration, the Hybrid
servo drive’s DC side voltage is
lower than the setting value of
Parameter 02-07.
Check if the voltage of the input power supply is
normal.
Check if there is any sudden heavy load.
Adjust Parameter 02-07 for the low-voltage level
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