Mitsubishi FREQROL-SF User Manual

1 Troubleshooting
1.2.2 The motor which has normally rotated stops abruptly.
Item Cause Check
Remedy
The fuse (Fl, F2, and/
0 Check the conductivity using
0 Replace the fuse (Fl, F2,
or F3) is blown.
a circuit tester (see
and/or F3) with a new one.
Alternatively, the NF Appendix 5).
(See Section 2.1).
1
(CBl) is tripped.
0 After replacing the fuse
with a new one or resetting
the NF,
if the same situa-
tion takes place, see Sec-
tion 1.2.3.
The power voltage is
0 Check the power voltage using 0 Adjust the related control
2
out of the range.
the circuit tester.
so that the input power
(See Table 1.3)
votlage is in the specified
range.
An input signal from 0 Check each bit of the
0 Check the input signal where
the sequencer is abnor- external signals 1 and 2 in
bits are abnormal so that
mal.
the diagnosis mode of the the signal is correctly
3
amplifier indicator. received.
For example, the bits of
ready ON,
forward rotation,
and reverse rotation signals.
(See Section 1.1.1(2).)
The input signal from
0 Check each bit of a control 0 Conduct the same counter-
the NC is abnormal. input by referencing Section measures as the Item 3 above,
1.1.2 which describes the
4
status display and diagnosis.
0 At the same time, check the
same items as the Item 3
above.
The signal from the 0 Set the parameter of the 0 Adjust the related control
encoder which contains amplifier as follows.
by referencing Section 2.9
a motor is abnormal.
(Note) _
which describes the adjust-
I 8 t-1
l-1 ,_I
I I I
:
ing procedure of motor
built-in encoder so that the
In an open loop state, input
output signal is in the
5
the speed reference and
specified level.
start command to rotate the 0 If the above adjustment can-
motor at a slow speed and
not be conducted, replace
check the signal from the the sensor section and
encoder. (See Section 2.9.) printed circuit board with
new ones.
(Note)
The parameter 00 is valid just after 1 is set. Since the parameter 00 is cleared
when the power is turned off or the equipment is reset, after setting 1, immediately
input the speed reference and start command.
-15-

Mitsubishi FREQROL-SF Specifications

General

Brand	Mitsubishi
Model	FREQROL-SF
Category	DC Drives
Language	English