Mitsubishi FREQROL-SF Troubleshooting Manual page 30

(4) Alarm No.l7(BE) P.C.B error
[Whether a component (especially
A/D converter) on the printed cir-
cuit board is normal or abnormal
is checked. 1
Item Cause
A component (especially, D Replace the SF-CA card with
1
printed circuit board
SF-CA card is defective.
The power of the equip-
ment is turned on while
the NF in the unit is
turned off.
2
(5) Alarm No.20(NSl) IC MAC007 Error
[The internal codes of the IC MAC007
on the SF-CA card are checked.]
Cause
Item
The IC (MAC 007) on the
printed circuit board
1
SF-CA card does not
correctly work.
Check
the new one and check that
the equipment correctly
works.
off.
Check
new one and check that the
equipment correctly works.
Remedy
the new one.
(See Section 2.4.4.)
circuit without appearance
of alarm No.17, set the
parameter X58 CVHS to "1".
However, to return back to
the normal operation mode,
make sure to set the 158
CVHS to "0". Otherwise,
the LED1 (which lights dur-
ing regeneration) on the
SF-CA card continuously
lights.
Remedy
board SF-CA card with the
new one.
(See Section 2.4.4.)