Chapter 5 Trouble shooting and maintenance
5-3
3. Errors which can only be recovered manually but cannot be auto-recovered
Display Error Cause Remedy
Over-current
during stop
1. Detection circuit
malfunctions
2. Poor connection on CT
signal cable
Contact your supplier
OC
Motor overload
1. Heavy load
2. Improper settings of b09
1. Increase motor capacity
2. Set b09 correctly according
to motor nameplate.
OL1
Inverter overload Heavy load Increase inverter capacity
OL2
Over current
limit
1. Heavy Load
2. Continuous over load
1. Increase motor capacity
2. Increase ACC/ DEC time
A04 ~ A05, etc
3. Set stall prevention function
b23 ~ b29
OCL
Under voltage
during operation
1. Power voltage too low
2. Power voltage
momentary dip
1. Improve power quality.
3. Use a reactor on the power
input side
4. Increase inverter capacity
LVC
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