GE VAT20 Series Instruction Manual page 40

Error handling of malfunction indication of OV.LV
Inverter display OV.LV
Is there
any abnormal breakage
on appearance
Switch ON
power supply
Is there any
malfunction indication
NO
Input operation
instruction
Input frequency
instruction
Is the output
frequency of controller
displayed
YES
Is there
output voltage on T1, T2,
and T3 terminals?
Connect motor. Is the
motor operating?
Is there any malfunction
indication?
NO
Is output
current of all phases in
balance condition.
YES
The inverter is
normal now.
Replace defective board
YES
Replace control board
NO
Replace control board
NO
Replace control board
YES
YES
NO
corrected by replacing
The inverter is out of order.
Detail examination is required.
38
Is the problem
NO
control board?
YES