Chapter 5 Troubleshooting and maintenance
5-8
FWD or REV LED
li
ht after flashes ?
Check Inverter parameters
YES
O
Perform parameter
initializations
Specify operation control
mode
Set up frequency command
Connect the motor to run
The inverter is OK
Replace the control board
Replace the control board
Replace the control board
The inverter is failed
Perform detailed check
‧
O
O
O
O
YES
YES
YES
YES
Is the frequency value
displayed in operation
unit?
Are there
voltage outputs at
terminals U, V and W
Is there any fault
dis
la
?
Are output
currents of each phase
even?
Does the control
Board function after
replacement
*From previous page
YES
O
Figure 5-1 N310 fault display and troubleshooting flow chart
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