Fuji Electric FRENIC-Multi - If no Alarm Code Appears on the LED Monitor; Motor Is Running Abnormally

6-2
6.2 If No Alarm Code Appears on the LED Monitor
6.2.1 Motor is running abnormally
[ 1 ] The motor does not rotate.
Possible Causes What to Check and Suggested Measures
(1) No power supplied to
the inverter.
Check the input voltage, output voltage and interphase voltage
unbalance.
Î Turn ON a molded case circuit breaker (MCCB), a
residual-current-operated protective device (RCD)/a ground fault
circuit interrupter (GFCI) (with overcurrent protection) or a
magnetic contactor (MC).
Î Check for voltage drop, phase loss, poor connections, or poo
r
contacts, and fix them if necessary.
(2) No forward/reverse
operation command was
inputted, or both the
commands were
inputted simultaneously
(external signal
operation).
Check the input status of the forward
/
reverse command with Menu
#4 "I/O Checking" using the keypad.
Î Input a run command.
Î Set either the forward or reverse operation command to off i
f
both commands are being inputted.
Î Correct the assignment of commands FWD and REV to function
codes E98 and E99.
Î Connect the external circuit wires to control circuit terminals
[FWD] and [REV] correctly.
Î Make sure that the sink/source slide switch on the interface
printed circuit board (interface PCB) is properly configured.
(3) No indication of rotation
direction (keypad
operation).
Check the input status of the forward
/
reverse rotation direction
command with Menu #4 "I/O Checking" using the keypad.
Î Input the rotation direction (F02 = 0), or select the keypad
operation with which the rotation direction is fixed (F02 = 2 or 3).
(4) The inverter could not
accept any run
commands from the
keypad since it was in
Programming mode.
Check which operation mode the inverter is in, using the keypad.
Î Shift the operation mode to Running mode and enter a run
command.
(5) A run command with
higher priority than the
one attempted was
active, and the run
command was stopped.
While referring to the block diagram of the drive command block*
,
check the higher priority run command with Menu #2 "Data
Checking" and Menu #4 "I/O Checking" using the keypad.
*
Refer to the FRENIC-Multi User's Manual, Chapter 4.
Î Correct any incorrect function code data settings (in H30, y98,
etc.) or cancel the higher priority run command.
(6) The frequency
command was set below
the starting or stop
frequency.
Check that a frequency command has been entered, with Menu #4
"I/O Checking" using the keypad.
Î Set the value of the frequency command to the same or highe
r
than that of the starting or stop frequency (F23 or F25).
Î Reconsider the starting and stop frequencies (F23 and F25), and
if necessary, change them to lower values.
Î Inspect the frequency command, signal converters, switches, o
r
relay contacts. Replace any ones that are faulty.
Î Connect the external circuit wires correctly to terminals [13], [12],
[11], and [C1].