6-24
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 LED monitor.
Possible Causes
What to Check and Suggested Measures
(1) Any of PID commands
and their feedback
related functions is
disabled.
Make sure that when you wish to view other monitor items, E43 is
not set to "10: PID command" or "12: PID feedback amount."
Î
Set E43 to a value other than "10" or "12."
Make sure that when you wish to view a PID command or a PID
feedback amount, PID control is still in effect or J01 is not set to "0."
Î
Set J01 to "1: Enable (Process control normal operation)" or "2:
Enable (Process control inverse operation)."
(2) Connection to the
keypad was in poor
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
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
5_01
under Menu #5 "Maintenance Information" in
Programming mode on the keypad, and check the voltage of the DC
link bus, which should be: 200 VDC or below for three-phase 200 V,
and 400 VDC or below for three-phase 400 V.
Î
Connect the inverter to a power supply that meets its input
specifications.
[ 3 ]
appears
Problem Parentheses
(
) has appeared on the LED monitor while the keypad displaying
the Drive Monitor.
Possible Causes
What to Check and Suggested Measures
(1) The data to be displayed
could not fit the LED
monitor (e.g. overflown).
Check that the product of the output frequency and the display
coefficient (E50) does not exceed 9999.
Î
Adjust the setting of E50.