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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) When the PID command
and its feedback amount
are selected as a
monitor item, the PID
control is disabled.
To view other monitor items: Check if E43 = 10 (PID command) or
12 (PID feedback amount).
Î
Set E43 to a value other than "10" or "12."
To view a PID command or its feedback amount: Check if the PID
control is disabled (J01 = 0).
Î
Set J01 to "1" (Enable process control, normal operation) or "2"
(Enable process control, inverse operation).
(2) When timer operation is
disabled (C21 = 0), timer
is selected as a monitor
item (E43 = 13).
When timer operation
had been enabled (C21
= 1) and timer had been
selected as a monitor
item by pressing the
key, you disabled timer
operation (C21 = 0).
To view other monitor items: Check if E32 = 13 (Timer).
Î
Set E43 to a value other than "13."
To view timer (s): Check if C21 = 0 (Disable).
Î
Set C21 to "1."
(3) The remote keypad
(option) was poorly
connected.
Prior to proceeding, check that pressing the
key does not
change the display on the LED monitor.
Check continuity of the extension cable for the keypad used in
remote operation.
Î
Replace the extension cable.
Check the RJ-45 connector for damage.
Î
Ensure the connector of the RJ-45 connector.
Î
Replace the remote keypad (option).
[ 2 ] _ _ _ _ (under bar) appears
Problem
Although you pressed the
key or entered a run forward command
FWD
or a run
reverse command
REV
, the motor did not start and an under bar ( _ _ _ _ ) appeared
on the LED monitor.
Possible Causes
What to Check and Suggested Measures
(1) The DC link bus voltage
was low.
Select
5_01
under Menu #5 "Maintenance Information" in
Programming mode on the keypad, then check the DC link bus
voltage that should be 200 VDC or below for three-phase 200 V
class series and 400 VDC or below for three-phase 400 V class
series.
Î
Connect the inverter to a power supply that meets its input
specifications.