Overcurrent - Mitsubishi FREQROL-SFJ Maintenance Manual

Cause
Trouble with card
SFJ-CA1
Trouble with power
unit IX-PW
Trouble with con-
trol unit

Overcurrent

Cause
Overload
Motor wiring impro-
Motor coil layer-
short, or grounding
Checkup
(open circuit).
SFJ
SFJ
Replace the card SFJ-CA1 card
with a new one to check.
curs again even after the
remedy described above.
Checkup
Parameter ;MSLi (#2)
does not meet motor in use.
load.
Motor wiring is incorrect.
0 Loose terminal screw
o U, V or W lead grounded
o Short-circuit of motor leads
V or W).
Measure insulation resistance.! Replace the motor
Insulation resistance
be less than 1MR.
Remedy -
Replace the card
Replace the power
Replace the con-
Remedy
setting Set parameter
i
MSL
'Reduce the load.
Correct motor
wiring.
should
-