EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

10.6 If an Abnormal Pattern Appears on the LED Monitor except Alarm Codes and "Light Alarm"
Indication ( )
[ 1 ] – – – – (center bar) appears
Problem A center bar (– – – –) appeared on the LED monitor.
Possible Causes
(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.
(2) The keypad was poorly
connected.
What to Check and Suggested Measures
Make sure that when you wish to view other monitor items, E43 is not set to "10:
PID command" or "12: PID feedback amount."
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."
Set J01 to "1: Enable (Process control normal operation)," "2: Enable
(Process control inverse operation)," or "3: Enable (Dancer control)."
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.
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
(1) The voltage of the DC link
bus was low.
(2) The main power is not ON,
while the auxiliary input
power to the control circuit is
supplied.
(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).
(4) Inverter running on
single-phase power
What to Check and Suggested Measures
Select 5_01 under Menu #5 "Maintenance Information" in Programming mode on
the keypad, then check the DC link bus voltage which should be 200 VDC or
below for three-phase 230 V series, and 400 VDC or below for three-phase 460
V series.
Connect the inverter to a power supply that meets its input specifications.
Check whether the main power is turned ON.
Turn the main power ON.
Check the connection to the main power and check if the H72 data is set to "1"
(factory default).
Correct the H72 data.
Refer to Section 10.7 "If the Inverter is Running on Single-Phase Power,” [ 2 ].
[ 3 ] appears
Problem Parentheses (
Possible Causes
(1) The display data overflows
the LED monitor.
) appeared on the LED monitor during speed monitoring on the keypad.
What to Check and Suggested Measures
Check whether the output frequency multiplied by the display coefficient (E50) is
1,000,000 or more.
Correct the E50 data.
10-26