5.1. Error Display and Corrective Action
5.1.1. Manual Reset and Auto-Reset
5. Troubleshooting and Maintenance
Faults which can not be recovered manually
Display Content Cause Corrective action
-oV-
Voltage too high when stopped
Detection circuit malfunction Consult with the supplier
-LV-
Voltage too low when stopped
1. Power voltage too low
2. Pre-charge resistor or fuse
burnt out.
3. Detection circuit malfunction
1.Check if the power voltage
is correct
2. Failed resistor or fuse
3. Consult with the supplier
-oH-
The inverter is overheated
when stopped
1. Detection circuit malfunction
2. Ambient temperature too
high or bad ventilation
Improve the ventilation
conditions, if no result then
replace the inverter
OH-C
The inverter is overheated
during running
1. IGBT temperature is too
high or bad ventilation
2. Temperature sensor error
or circuit malfunctions
1. Reduce carrier frequency
2. Improve the ventilation
conditions, if no result then
replace the inverter
CtEr
Current s.ensor detection
error
Current sensor error or
circuit malfunction
Consult with the supplier
EPr
EEPROM problem Faulty EEPROM Consult with the supplier
Cot
Communication error Communications disruption Check the wiring
Specications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network.18/11/2014 31
Motor Controllers AC Variable Frequency Drives Type Variex
3
RVLF
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