Mitsubishi FREQROL-SF Troubleshooting Manual page 8

Table 1.3
Checking
AC power voltage
Checking DC power
supply voltage on
printed circuit
board
Table 1.4
cation
When the amplifier is powered on at the first
1
time, it does not normally work.
The equipment which has normally worked does
2
not abruptly work.
The equipment does not work in occasions.
The orientation stop position deviates from
3 the specific position.
lights, it is recovered by turning off and
then on the equipment or by resetting it.
When the power is turned on, the display of
the operation panel does not appear at all.
1
Alternatevely,
circuit board is not correct.
When the power is turned on, the display on
the operation panel does not indicate rota-
2 tions in the status display mode (as shown in
the following figure).
B
The display on the amplifier printed circuit
board (SF-CA card) indicates an alarm (as
shown in the following figure).
3
Checking power voltage
Amplifier input pins
Xl, X2, X3, and E
Checking DC output
voltage at check
pins on SF-PW card
Trouble classification
Situation
Although an alarm
the DC voltage of the printed
See Appendix l-l
See Appendixes 5,
Continued on the next page.
1.2.1
1.2.2
1.2.3
1.3.2
1.3.3