6-3
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.
Turn on a molded case circuit breaker, an earth leakage
circuit breaker (with overcurrent protection) or a magnetic
contactor.
Check for voltage drop, phase loss, poor connections, o
poor 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.
Input a run command.
Set either the forward or reverse operation command to off i
both commands are being inputted.
Correct the assignment of commands (FWD) and (REV) to
function codes E98 and E99.
Connect the external circuit wires to control circuit terminals
[FWD] and [REV] correctly.
(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.
Input the rotation direction (F02=0), or select the keypad
operation with which the rotation direction is fixed (F02=2 o
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.
While referring to the block diagram of the drive command
generator
*,
check the higher priority run command with Menu
#2 "Data checking" and Menu #4 "I/O checking" using the
keypad.
*
Refer to the FRENIC-Mini User’s Manual (MEH446), Chapter 4.
Correct any incorrect function code data settings (e.g.,
cancel the higher priority run command).
(6) The set frequency was set
below the starting or
stopping frequency.
Check that a frequency command has been entered, with
Menu #4 "I/O checking" using the keypad.
Set the value of the set frequency to the same or higher than
that of the starting or stop frequency (F23 or F25).
Reconsider the starting and stop frequencies (F23 and
F25), and if necessary, change them to lower values.
Inspect the frequency command devices, signal converters,
switches, or relay contacts. Replace any ones that are
faulty.
Connect the external circuit wires correctly to terminals [13],
[12], [11] and [C1].
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