Fuji Electric FRENIC MEGA G2 Series - Page 646

6.5 Other Errors
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6.5 Other Errors
6.5.1 Abnormal motor operation
[ 1 ] The motor does not rotate
Possible cause
Check and measures
(1) The main power supply is not
being input correctly.
Check the input voltage and interphase voltage unbalance.
➔ Switch on the molded-case circuit breaker, an earth-leakage circuit
breaker (with overcurrent protective function) or a magnetic
contactor.
➔ Check for voltage drop, phase loss, poor connections, or poor
contacts, and fix them if necessary.
➔ If only the auxiliary control power input is supplied, also supply the
main power to the inverter.
(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 “I/O
Checking” using the keypad.
➔ Input a run command.
➔ Set either the forward or reverse operation command to OFF.
➔ Correct the run command source. Set F02 data to “1.”
➔ Correct the assignment error of terminals [FWD], [REV]. (E98, E99)
➔ Connect the external circuit wires to control circuit terminals [FWD]
and [REV] correctly.
➔ Make sure that the sink/source slide switch (SW1) on the control
printed circuit board (control PCB) is properly configured.
(3) No rotational direction is
instructed.
(Keypad operation)
Check the forward/reverse rotation direction command with Menu “I/O
Checking” using the keypad.
➔ 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.
➔ 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.
Based on the run command block diagram (See Chapter 8), check a
higher priority run command by function code data check and I/O
checking from Menu using the keypad.
➔ Correct any incorrect function code data settings such as link
function (Mode selection) (H30) and bus link function (Mode
selection) (y98) or cancel the higher priority run command.
(6) No analog frequency command
input.
Check that a reference frequency has been entered correctly, using
Menu “I/O Checking” on the keypad.
➔ Connect external circuit wirings of terminals [13], [12], [11], [C1],
and [V2] correctly.
➔ If using terminal [V2], check the terminal [V2] function select switch
(SW5) select switch, and the thermistor (operation selection) (H26)
setting.