Chapter 5 Troubleshooting and maintenance
5-3
3. Faults which can be recovered manually but not automatically
Display Fault Cause Corrective Action
Over-current during
stop
1. Detection circuit
malfunction
2. Bad connection for CT
signal cable
1.Check the noise between Power
line and motor line
2.Return the inverter for repair
Motor overload
1. Excessive load
2. Incorrect settings for
06-01, 07-05~08
1. Increase the motor capacity
2. set 06-01, 07-05~08 correctly
Inverter overload Excessive Load
Increase the inverter capacity
Over torque
1. Excessive Load
2. Incorrect settings for
07-11, 07-12
1. Increase the inverter capacity
2. set 07-11, 07-12 correctly
Voltage too low
during operation
1. Power voltage too low
2. Power voltage varies widely
(fluctuates)
1. Improve power quality or
increase the value of 4-04
2. Set a longer acceleration time
3. Add a reactor at the power input
side
4. Increase the motor capacity
OL1
OL2
OL3
OC
LV-C
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