43
Error handling of malfunction indication of OV.LV
Inverter display OV.LV
Switch ON
power supply
Is the output
frequency of controller
displayed
Detail examination is required
The inverter is out of order
Is there
any abnormal breakage
on appearance
Input operation
instruction
Replace defective board
NO
NO
Is there any
malfunction indication
Input frequency
instruction
Is there
output voltage on T1, T2,
and T3 terminals?
Connect motor. Is the
motor operating?
Is there any malfunction
indication?
Is output
current of all phases in
balance condition?.
The inverter is
normal now
Replace control board
Replace control board
Replace control board
Is the problem
corrected by replacing
control board?
YES
YES
NO
YES
YES
NO
YES
NO
YES
NO