
B-70254EN/01 5.TROUBLESHOOTING
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No. Cause of trouble Solution
2 Turbo blower rotor
locked
3 Failed bearing in turbo
blower
4 Invalid inverter setting
It is necessary to replace or adjust the part.
Call the FANUC service center.
ALM No.4101
Inverter frequency reached signal abnormal
This alarm is issued, if a frequency reached signal is not received
within 120 seconds after the turbo blower is started.
No. Cause of trouble Solution
1 Cable connection
abnormal
2 Faulty turbo blower
3 Inverter abnormal
4 Invalid inverter setting
It is necessary to replace or adjust the part.
Call the FANUC service center.
ALM No.4105
Turbo blower temperature abnormal
This alarm is issued, if the temperature of the turbo blower
motor winding becomes higher than the permissible level.
No. Cause of trouble Solution
1 Cooling water
temperature high
Reduce the temperature of the cooling water.
2 Insufficient cooling
water
The amount of cooling water supplied to the turbo
blower may be insufficient.
Check whether the cooling water tube between
the water branch unit and blower is twisted or
clogged. If the tube is twisted or clogged, replace
the tube.
If a tube in the turbo blower is clogged, clean the
tube.
3 Anomaly of temperature
sensor
4 Anomaly of temperature
sensor cable
connection
5 Anomaly of turbo blower
It is necessary to replace or adjust the part.
Call the FANUC service center.
ALM No.4106
Low turbo blower oil
This alarm is issued if the signal from the turbo blower oil sensor
indicates that the oil level has fallen below the setting.
No. Cause of trouble Solution
1 The oil level is lower
than specified.
Replenish the turbo blower with oil until the oil
level on the oil gauge is between H and L.
Replace the oil every 1000 hours of operation.
2 Insufficient turbo blower
cooling
When the temperature of the turbo blower motor
section is high, check whether the cooling water
path is clogged. If the cooling water path is
clogged, wash the turbo blower.