Mitsubishi FREQROL-SFJ, Руководство по обслуживанию

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Cause
Overload
Trouble with CON2
cable or motor
built-in encoder
Trouble with card
SFJ-CA1
Trouble with con-
Check that speed can be
Replace the con-
trol unit
creased to desired speed in
trol unit.
Checkup
Remedy
Load (read on load meter)
the load.
is larger than 120%.
the duty.
Rotate the motor shaft with
/Replace the
"READY" signal turned off
or motor
with hand and check speed
encoder.
indication by the LED read-
After making sure this alarm
Replace the card
is reproducible, replace the
card SFJ-CA1 in use with
a new card SFJ-CA1 to check.
open loop control mode.
Check speed indication by
the LED readout.
MAIN CIRCUIT FAULT
This alarm occurs if the main circuit is not in good con-
dition.
Cause
Checkup
Trouble with card
Remedy
Replace the card SFJ-CA1 with Replace the card
; a new card SFJ-DA1 to check.
with a new one.
Trouble with
If the same alarm occurs
Replace the con-
trol unit
again with a new card
unit.
CAL, the control unit is
likely to be defective.
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