CARLO GAVAZZI VariFlex3 RVLF Series - Troubleshooting for OV, LV Error

Motor Controllers AC Variable Frequency Drives Type VariFlex
3
RVLF
126 Specications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network. 13/12/2017
5.3.3. Troubleshooting for OV, LV error
The inverter displays OV, LV
The inverter’s output is OK
Is the current on all phases
even?
Any abnormal value?
Is there Voltage at T1,T2,T3
output terminals?
Is the output frequency of the
operating unit displayed?
Is FWD LED still illuminated after ash
Is the main circuit fuse intact？
Any visual abnormalities?
Any abnormal indications?
Is the inverter operation OK
after board replacement?
Replace the control
board
Perform detailed check and
consult with the supplier
YES
NO
YES
YES
YES
NO
YES
NO
YES
YES
NO
NO
NO
YES
YES
NO
NO
Connect the motor to run
Input frequency commands
Input operation command
Apply power
Consult with the supplier
Consult with the supplier
Consult with the supplier
Consult with the supplier
Replace the control board