1 Troubleshooting
8
9
10
11
Cause
Check
The diode stack is
defective.
The surge absorbers and
condensers are defec-
tive.
The current detection
circuit is defective.
The motor is overloaded.
The cable connections
between the amplifier
and motor are incorrect.
The wiring of the motor
is rare-shortcircuited
or earth-grounded.
o
Check the diode stack in the
0
Replace the main circuit
same manner as the Item 5
unit of the amplifier with
above.
a new one.
o
Check them in the same manner
as the Item 5 above.
0
Observe the waveforms at the
following check pins using an
oscilloscope and check that
the peak value exceeds 10 V.
Between CH39 and AGA:
Regenerative converter
side
Between CH42 and AGA:
Converter side
Between CH43 and AGA:
Inverter side
(See Appendix
9(l).)
0
Check that the motor is over-
loaded using a load meter or
the load display in the
status display
mode (see
Section
1.1.1).
3
Visually check the cable con-
nections.
0
Check that the screws of the
cable connection terminal are
loosen.
Disconnect the cables between
the amplifier and motor and
check the insulation resist-
ance between the following
leads.
Between
U
and W; between V
and W; between U and W;
between each of
U,
V, and
W and E
1.3 Checking method and
remedy of trouble
classification
B
Remedy
(Note)
See Section 2.6 and
2.7.
0
Replace the main circuit
unit of the amplifier with
a new one.
0
Replace the printed circuit
board SF-CA card with a new
one.
(See Section 2.4.4.)
(Note) Normally, the peak
voltage is in the range
from 6 to 7 V while the
motor accelerates or
decelerates.
D
Review the cutting condition
and tool being used.
3
Correctly connect the
cables.
s
Tighten the screws being
loosen.
)
Replace the motor with a
new one.
-
31
-
To Next Page
Loading...