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6.4 If an Abnormal Pattern Appears on the LED Monitor while No Alarm Code is Displayed
[ 1 ] – – – – (center bar) appears
Problem A center bar (– – – –) has appeared on the LCD monitor.
Possible Causes What to Check and Suggested Measures
(1) Connection to the keypad
was in weak connection.
Prior to proceed, check that pressing the
key does not take effect for the
LED display.
Check connectivity of the extension cable for the keypad used in remote
operation.
Î Replace the cable.
[ 2 ] _ _ _ _ (under bar) appears
Problem An under bar ( _ _ _ _ ) appeared on the LED monitor when you pressed the
key or the
key or entered a run forward command FWD or a run reverse command REV. The motor did not
start.
Possible Causes What to Check and Suggested Measures
(1) The voltage of the DC link
bus was low.
Select Menu 5 "Maintenance Information" in Programming mode on the
keypad, and check the voltage of the DC link bus, which should be: 400 VDC
or below for 3-phase 400V.
Î Connect the inverter to a power supply that meets its input specifications.
(2) The main power is not ON,
while the auxiliary input
power to the control circuit
is supplied.
Check that the main power is turned ON.
Î If it is not ON, turn it ON.
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