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7-5
7-2 Abnormal motor rotation
(1) If motor does not rotate
YES
NO
YES
YES
NO
NO
YES
NO
YES
Motor does not rotate.
Charge lamp (CRG)
lights and LCD monitor
lights up?
Are the circuit breaker and
magnetic contactor on the
power supply side switched on?
Turn on.
Is the LCD monitor
displaying an alarm
mode screen?
Is operation method
the keypad panel or
control terminal input?
Is a jumper or DC reactor
connected between
terminals P1 and P(+)?
Connect.
If no error is detected,
continue operation.
Keypad
panel
Control
terminals Inverter may be faulty.
Contact Fuji Electric.
Does the motor run
if FWD or REV is
pressed?
Was the forward or
reverse operation
command given?
Replace the faulty
switch or relay.
Has the frequency
been set?
Correct the wiring error.
Set the frequency
correctly.
Are the inverter output
terminals (U,V,W) provided
with the proper voltage?
Inverter may be faulty.
Contact Fuji Electric.
Faulty motor
Excessive load? Correct the wiring error.
Is the torque boost
set correctly?
The load is excessive,
resulting in motor lock.
Reduce the load and check
that the brake is released
(if a mechanical brake is used).
NO NO
Remove the cause of
alarm function activation
and reset the alarm,
then run the motor.
YES
YES
Are the voltages
on the power terminals
(R/L1, S/L2, T/L3) normal?
NO
YES
YES
NO
NO
YES
NO
YES
YES
NO
NO
YES
NO
NO
Replace the faulty
frequency setting POT (VR)
, signal converter, switch,
or relay contacts as required.
NO
Check for problems
(low voltage,
an open-phase,
a loose connection,
poor contact) and
remedy accordingly.
Are the frequency limiter
(High) and the frequency
setting lower than
the starting frequency?
YES
Are the cables to
the motor connected
correctly?
YES
NO
NO
YES
NO
YES
Raise the torque boost.
YES
Note: Monitor the operation
command or frequency setting
values, etc., on the LED or LCD
monitor after selecting
the respective functions.
Are external wiring between
control circuit terminals
FWD, REV -CM
connected correctly?
Is the external wiring
between control terminals
13, 12, 11, C1and V2 or
between X1-X9 and
CM for the multistep
frequency selection
connected correctly?
Press the !Up!
key and set
the frequency.
Does the motor start
when the !Up! key
is pressed?
The motor does not rotate if the following commands are issued.
An operation command is issued while the coast-to-stop or DC braking command is output
A reverse operation command is issued with the “H08 Rev. phase sequence lock” value set to 1.
∧
A
re external wiring between
control circuit terminals
FWD, REV-CM connected
correctly?
Replace the faulty
frequency setting POT (VR),
signal converter, switch,
or relay contacts as required.
∧