Troubleshooting For Ov、Lv Error Display - TECO E510s Series Instruction Manual

5.3.3 Troubleshooting for OV, LV error display
The inverter displays OV, LV
Is the main circuit fuse intact?
YES
Any visual abnormalities?
NO
Apply power
Any abnormal indications?
Input operation command
Is FWD LED still illuminated after flash
YES
Input frequency commands
Is the output frequency of the
operating unit displayed?
YES
Is there Voltage at T1,T2,T3
output terminals?
YES
Connect the motor to run
NO
Any abnormal value?
NO
Is the current on all
even?
YES
The inverter's output is OK
NO
phases
NO
YES
YES
NO
NO
Replace the control
board
Is the inverter operation OK
YES
after board replacement?
YES
NO
5-18
Consult with the supplier
Consult with the supplier
Consult with the supplier
Consult with the supplier
Replace the control board
Perform detailed check and
consult with the supplier
NO