TROUBLE SHOOTING
7-8
Problems with inverter settings
1. If the data of function codes cannot be changed
What to Check and Suggested Measures
1. An attempt was made
to change function
code data that cannot
be changed when the
inverter is running.
Check if the inverter is running with Menu#3 “Drive monitoring”
using the keypad and then confirm whether the data of the function
codes can be changed when the motor is running by referring to the
function code tables.
→ Stop the motor then change the data of the function cades.
2. The data of the
function codes is
protected.
Check the data of function code F00
→ Disable data protection of function codes.
3. The WE – KP
command (“Enable
editing of function
codes data from
keypad”) is not input
though it has been
assigned to a digital
input terminal.
Check the data of function code E01, E02, E03, E98 and E99 and the
input signals with Menu#4 “I/O checking” using the keypad.
→ Cancel data protection of the function codes or turn on the
“Enable editing of function codes data from keypad” command.
4. DC link circuit voltage
was below the under
voltage detection
level.
Check the DC link circuit voltage with Menu #5 “Maintenance
information” and measure the input voltage using the keypad.
→ Supply power to match the inverter’s input rating and change the
data of the function codes.
2. The desired menu is not displayed.
What to Check and Suggested Measures
function was not
Check the data of function code E52.
→ Change the data of function code E52 to display the desired
3. Nothing appears on the LED monitor.
Possible Causes What to Check and Suggested Measures
1. No power supplied to
the inverter.
Check the input voltage, output voltage and inter phase voltage
unbalance.
→ Connect a molded case circuit breaker, an earth leakage circuit
breaker (with the exception of those exclusively designed for
protection from ground faults) or a magnetic contactor.
→
Check for voltage drop, phase loss, poor connections, or poor
contacts, and fix them if necessary.
2. The power for the
control circuit did not
reach a high enough
level.
Check if the jumper bar has been removed between terminals P1 and
(+) or if there is poor contact between the jumper bar and the
terminals.
→ Connect
the jumper bar to terminals P1 and P (+) or tighten the
screws. Or connect a DC reactor.
→ Replace the inverter if it is malfunctioning.
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