Fuji Electric FRENIC-Ace series - Display of Center Bars (-)

6.5 When Codes Other Than Alarm Codes and Light Alarm Indication (
l-al ) are Displayed
6-33
TROUBLESHOOTING
Chap 6
[ 3 ] Display of under bars (
____
)
Phenomena Although key, run forward command [FWD], or key, run reverse command [REV], was
pressed, the motor did not rotate and under bars were displayed.
Possible Causes Check and Measures
(1) The voltage of the DC
intermediate circuit was low.
Select 5_01 from Menu #5 “Maintenance Information” in the program
mode of keypad to check the DC intermediate circuit voltage (3-phase
200V: 200VDC or less, 3-phase 400V: 400VDC or less).
 Connect the inverter to a power supply that meets its voltage supply
range.
(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.
 Turn on the main power.
Check if the shorting bar has been removed between terminals P1 and
P(+) or if there is a poor contact between the shorting bar and those
terminals.
 Mount a shorting bar or a DC reactor between terminals P1 and
P(+). In case of poor contact, tighten the screws.
(3) AC power source is not
connected due to the
connection of DC power supply,
but the detection of main power
interruption is activated
(H72=1).
Check the connection to the main power and check if the H72 data is set
to “1” (factory default).
 Review the data of H72.
(4) Breaks in wiring to the main
power input terminals.
Measure the input voltage.
 Repair or replace the main circuit power input wires or input devices
(MCCB, MC, etc.).
[ 4 ] Display of center bars (
----
)
Phenomena A center bar (----) appeared on the LED monitor.
Possible Causes Check and Measures
(1) When PID control had been
disabled (J01 = 0), E43 (LED
Monitor (Item selection)) is set
to 10 or 12.
PID control has been disabled
(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 value.”
 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 value, 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).”
(2) The keypad was poorly
connected.
Prior check: Even when key is pressed, the display is not switched.
Check continuity of the extension cable used in remote operation.
 Replace the cable.
[ 5 ]
c ]
Display of parenthesis
Phenomena c ] was displayed during speed monitoring by keypad.
Possible Causes Check and Measures
(1) The display data overflows the
LED monitor.
Check whether the product of the output frequency and the display
coefficient (E50) exceeds 99,999.
 Correct the E50 data.