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MITSUBISHI CNC
Appendix 2 Explanation of Alarms
Fan stop
Alarm No.
45
A cooling fan built in the drive unit stopped, and overheat occurred in the power module.
Investigation details
Turn the unit power ON again, and
confirm the rotation of the fan.
Note) Assure more than 10 seconds
for the time from when the power is
turned OFF till when it is turned ON.
1
For the fan used for the drive unit,
assuring more than 10 seconds for the
time from when the power is turned
OFF till when it is turned ON is
required.
Check if the connector connected to a
2
fan is loosened or disconnected in the
unit.
Check if oil or cutting chips are
3
adhered to the fan.
624
Investigation results
The fan is rotating, and an alarm did
not occur again.
The fan did not rotate. Or, an alarm
occurred again.
[1]The connector is loosened.
[2]The connector is disconnected.
[1]The connector is not loosened.
[2]The connector is not disconnected.
Oil or cutting chips are adhered.
Oil or cutting chips are not adhered.
The cable may be broken.
Remedies
Continue to use.
The power may be turned ON without
assuring more than 10 seconds for the
time from when the power is turned
OFF till when it is turned ON.
Leave for more than 10 seconds, and
turn the power ON again.
Check the investigation item No. 2.
Correctly connect the connector.
Replace the fan.
Check the investigation item No. 3.
Improve the use environment and
replace the drive unit.
Replace the fan.
Replace the drive unit.
SV SP
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Troubleshooting
