24
Chapter 5 Troubleshooting
5.1 Errors
Err No.
Error Name
Cause
Solutions
Err.02
Main circuit
under-voltage
Main power supply under-voltage or
over-fluctuate
Check R, S, T input power
Err.03
Main circuit
over-voltage
Main power voltage over-voltage or
over-fluctuate
Check R, S, T input power
Brake resistor broken
Check Brake resistor
Brake resistor insufficient power
Re-confirm load status or replace a brake
resistor with higher rated power
Servo drive malfunction
Replace Servo drive
Err.04
Control circuit
under-voltage
Control circuit power voltage too low
Check L1, L2 input power voltage, or check
cable terminal contact status
Control
circuit
power
voltage
over-fluctuate
Increase PA153, PA154 value
Err.01
Motor overload
Motor model parameter (PA9) not
match
Contact DORNA directly
encoder line malfunction
Check encoder line wiring, model and check
cable terminal contact status
motor power line malfunction
Check motor power line wiring, phase
sequence and check cable terminal contact
status
Motor encoder malfunction
Replace servo motor
Motor stall or overload;
Motor torque is more than rated
torque
Re-confirm load status or replace a bigger
servo
Increase torque limit (PA48)
Increase overload curve (PA81, PA82)
Increase servo acceleration/deceleration time
constant (PA39, PA40)
Servo drive malfunction
Replace Servo drive
Err.06
Motor overload
Same as above
Increase overload curve (PA120, PA121)
Err.07
Motor overload
Same as above
Increase overload curve (PA122, PA123)
Err.05
Motor over-speed
Motor model parameter (PA9) not
match
Contact DORNA
encoder line malfunction
Check encoder line wiring, model and check
cable terminal contact status
motor power line malfunction
Check motor power line wiring, phase
sequence and check cable terminal contact
status
