Fault Description Causes Possible Solution
CE Communication
Timeout
* Communication fault * PC/PLC does not send command at
xed time
* Check communication line for
reliable connected
FL Flycatching Fault * Flycatching failure * Track again
* Contact manufacturer
Note: No P.F1 protection for single-phase and three-phase under 5.5kW.
Only above 22kW inverters can trip into OC2
Malfunction Items to Be Checked Counter Measures
Motor not Running Wiring correct?
Setting correct?
Too big with load?
Motor is damaged?
Malfunction protection occurs?
Get connected with power
Check wiring
Checking malfunction
Reduce load
Check against Table 10-1
Wrong Direction of Motor
Running
U, V, W wiring correct?
Parameters setting correct?
Correct wiring
Set the parameters correctly
Motor Turning but Speed
Change not Possible
Wiring correct for lines with given
frequency?
Correct setting of running mode?
Motor overloaded?
Correct wiring
Correct setting;
Reduce load
Motor Speed Too High or
Too Low
Motor’s rated value correct?
Drive ratio correct?
Inverter parameters are set
incorrectly?
Check if inverter output voltage is
abnormal?
Check motor nameplate data
Check the setting of drive ratio
Check parameters setting
Check V/HZ Characteristic value
Motor Running Unstable Too big load?
Too big with load change?
Phase loss?
Motor malfunction.
Reduce load; reduce load change,
increase capacity
Correct wiring
Power Trip Wiring current is too high? Check input wring
Selecting matching air switch
Reduce load
Check inverter malfunction
5-3 Troubleshooting
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