Fuji Electric FVR-E11S-7EN

7-6
(2) The motor rotates but the speed does not change.
The motor rotates
but the speed does
not change.
Change the
setting.
YES
Set a larger value.
Check if the
maximum frequency
setting is small.
NO
YES
Check if the upper/
lower frequency
limiter is activated.
NO
Check if the timer
time is too long.
YES
Set the frequency.
Keypad panel
operation
Check if the speed
changes when the up
or down key is
pressed.
Pattern
operation
Check if the frequency
setting method is
keypad panel
operation, analog
signal, multistep
frequency, or UP/
DOWN method. Check
if the operation method
is pattern operation.
Check if the
frequency setting
signal (0 to +/-10 V, 4
to 20 mA) changes.
Analog signal
Check if the end
of the pattern is
reached.
Check if the
acceleration time
and deceleration
time are identical.
Multistep frequency
or UP/DOWN
Check if the wiring or
the external circuits
across control
terminals X1 through
X5 and the CM
terminal are correct.
YES
YES
NO
Correct the wiring.
Check if the wiring of
the external circuits
with control
terminals 13, 12, 11
and C1 are correct.
NO
YES
YES
Check if the frequency
of each step for
multistep frequency is
different from each
other.
Correct the
frequency setting.
Replace the frequency
setting unit and signal
converter because
they are faulty.
NO
YES
NO
NO
NO
NO
YES
Failure of the inverter
or malfunction due to
electric noise or other
cause is probable.
Contact Fuji Electric.
Check if the
acceleration time and
deceleration time are
excessively long.
Change to the time
suitable for the
load.
YES
NO
YES
The change in the rotation speed of the motor is also small in the following cases.
— ”
””
”F01 "Frequency command 1" and C30 "Frequency command 2" are set at "3" and a signal is input from bot
h
of control terminals 12 and C1, and there is no change in the sum of them.
— The load is excessively large and the torque limit and current limit functions are activated.
P24