6-22
6.6 If an Abnormal Pattern Appears on the LED Monitor while Neither an Alarm Code nor "Light
Alarm" Indication (
l-al
) is Displayed
[ 1 ] – – – – (center bar) appears
Problem A center bar (– – – –) appeared on the LED monitor.
Possible Causes What to Check and Suggested Measures
(1) When PID control had been
disabled (J01 = 0), you
changed E43 (LED Monitor
(Item selection)) to 10 or 12.
With the PID being enabled
(J01 = 1, 2, or 3), you disabled
PID control (J01 = 0) when the
LED monitor had been set to
display the PID command or
PID feedback amount by
pressing the
key.
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,
J01 (PID control) is not set to "0: Disable."
Î Set J01 to "1: Enable (Process control normal operation)," "2: Enable (Process
control inverse operation)," or "3: Enable (Dancer control)."
(2) The keypad was poorly
connected.
Prior to proceed, 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 cable.
[ 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 voltage of the DC link bus
was low.
Select
5_01
under Menu #5 "Maintenance Information" in Programming mode on
the keypad, then check the voltage of the DC link bus which 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.
(2) The main power is not ON,
while the auxiliary input power
to the control circuit is
supplied.
Check whether the main power is turned ON.
Î Turn the main power ON.
(3) Although power is supplied not
via the commercial power line
but via the DC link bus, the
main power down detection is
enabled (H72 = 1).
Check the connection to the main power and check if the H72 data is set to "1"
(factory default).
Î Correct the H72 data.
[ 3 ]
appears
Problem Parentheses ( ) appeared on the LED monitor during speed monitoring on the keypad.
Possible Causes What to Check and Suggested Measures
(1) The display data overflows the
LED monitor.
Check whether the product of the output frequency and the display coefficient (E50)
exceeds 99999.
Î Correct the E50 data.
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