No Alarm Disply Appears, But Motor Rotates Slowly - Mitsubishi FREQROL-SFJ Maintenance Manual

Oriented spin-
stop signal 'nal (ORA) is on.
ration is impossible), or large sound arises in motor
. . ..-. ~______~_.
Cause
Input power
Speed reference Check if motor speed does
signal input
signal source
Trouble with
motor built-in
encoder/CON2
cable or motor
built-in en-
Pin 2 and 3 of
not'set proper-
; 1Y
Checkup
BSL setting.
Oriented spindle stop sig-
Checkup
Check wire connection to
output terminals U, V and
W of FR-SFJ (phase sequen-
ce).
Check the input power sup-
ply in all 3 phases.
I
not increase in accordance
with speed reference signal. nal circuit.
When motor shaft is turned
by hand with "ready;' signal
turned off, speed display
by the LED readout is not
in accordance with motor
shaft rotation.
Check Pin 2 and 3 settings
Remedy
interface.
spindle stop signal.
Remedy
Correct or remedy
the wiring.
Use the correct spe-
cified power supply.
Remedy the external
speed reference sig-
Check the motor
built-in encoder/
CON2 cable.
Replace the motor
buiit-in encoder.
nected to M30Q or not.
N o t
Connected
connected
_ _ _
Shows that pin
is set.
_ -.-