Chapter 5 Trouble shooting and maintenance
5-3
3. Errors which can only be recovered manually (no auto-restart)
Display Error Cause Corrective Action
Over-current
during stop
1. OC Detection circuit
malfunction
2. Bad connection for CT
signal cable
Send the inverter back for
repair
Motor overload
1. Heavy load
2. Improper settings of F43
1. Increase motor capacity
2. Set F43 correctly according
to motor nameplate.
Inverter overload Excessively heavy load Increase inverter capacity
Under voltage
during operation
1. Power voltage too low
2. Power voltage varies
widely
1. Improve power quality.
2. Set a longer acceleration time
3. Add a reactor at the power
input side
4. Contact technical support
Note: “@” means when the inverter fails, the failure contact does not activate.
OC
OL1
OL2
LVC
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