TECO N310 Series - Troubleshooting for OV, LV Error

Chapter 5 Troubleshooting and maintenance
5-10
Troubleshooting for OV, LV error
The inverter displays OV, LV
Apply power
Any abnormal
indications?
Input operation command
Input frequency commands
Replace the main circuit fuse
Replace the faulty circuit
b
oard
Replace the control board
Replace the control board
Replace the control board
Replace the control board
Perform detailed chec
k
The inverter is failed
N
O
YES
YES
N
O
NO
YES
‧
Is the main circuit fuse
intac
t
？
Any visual abnormalities?
Is FWD LED still
illuminated after flash
Connect the motor to run
The inverter’s output is OK
YES
YES
YES
YES
N
O
N
O
N
O
N
O
Is the output frequency of the
operating unit displayed?
Is there
Voltage at T1,T2,T3 output
terminals?
Any abnormal value?
Is the current on all
phases even?
Is the inverter
working well after
replacement?
YES
YES
N
O
N
O
Figure 5-3 OV, LV Fault Display Flow Chart