Mitsubishi FREQROL-SFJ - Main Circuit Fault

c
Cause
Overload
Trouble with CON2
cable or motor
built-in encoder
Trouble with card
SFJ-CA1
Trouble with con-
Check that speed can be in-
Replace the con- 1
trol unit
creased to desired speed in
trol unit.
I
Checkup
Remedy
Load (read on load meter)
I
--/
iDecrease the load. 1
is larger than 120%.
I
ILighten the duty. ’
Rotate the motor shaft with
/Replace the CON2
I
"READY" signal turned off
jcable or motor
with hand and check speed
ibuilt-in encoder.
indication by the LED read- 1
/
out.
/
After making sure this alarm
Replace the card
is reproducible, replace the
SFJ-CAl.
card SFJ-CA1 in use with
a new card SFJ-CA1 to check.
open loop control mode.
Check speed indication by
the LED readout.
._I
(6) MAIN CIRCUIT FAULT
This alarm occurs if the main circuit is not in good con-
dition.
-__--.-. -
Cause
Checkup
j Trouble with card
Remedy
j Replace the card SFJ-CA1 with Replace the card
.i
1
t-
; a new card SFJ-DA1 to check.
with a new one.
1
PP.
--.- _--.. - . -. _.__._
Trouble with con-
j If the same alarm occurs
1
I
Replace the con- i
trol unit
again with a new card SFJ-
,trol unit.
CAL,
the control unit is
/
likely to be defective.
1
1
c
- 97 -