29
When abnormal conditions are encountered, take appropriate measures immediately referring to the following table. If they
are not repairable, consult agencies, sales office, or office of Sumitomo Drive Techonologies.
•
Identify and provide appropriate corrective action in a timely fashion for any abnormal operation characteristics
accroding as the maintenance manual. Do not operate the unit until corrective action has been taken.
CAUTION
Details of trouble
The motor will not operate under no load.
The switch is heated.
Fuse tripping
The motor runs in the reverse direction.
Fuse tripping
Excessive temperature rise
Oil leaks from the joint surface
of the housing.
Cause
Power failure
Defective electric circuit
Blown fuse
Protective device is engaged.
Load locking
Poor switch contact
Disconnection of motor stator coil
Bearing is broken.
3-phase is functioning as single-phase.
Insufficient capacity of switch
Overload
Insufficient capacity of fuse
Overload
Voltage drop
Overload
Short-circuited motor stator coil
The key is missing.
The bearing is burned.
Poor adjustment of protective device
Connection error
The outlet wire is short-circuited.
Poor contact between motor and starter
Overload
Voltage drop or rise
Scorched bearing
The ambient temperature is high.
Damage due to overloading of gears and
bearings
Damaged oil seal
Scratches or abrasion of the lip contact section
Loose tightening bolt
Correction
Contact the electric power company.
Check the circuit.
Replace the fuse.
Fix the problem and recover.
Check the load and safety device.
Adjust the contact area.
Confer with authorized service station.
Confer with authorized service station.
Check the power supply with a voltmeter.
Check the motor, coil in the transformer,
contactor, fuse, etc. and repair or replace
them.
Replace with specified switch.
Decrease the load to the specified value.
Replace with specified fuse.
Decrease the load to the specified value.
Contact the electric power company.
Decrease the load to the specified value.
Confer with authorized service station.
Install a key.
Confer with authorized service station.
Adjust the protective device.
Change the connection.
Confer with authorized service station.
Complete the connection.
Decrease the load to the specified value.
Contact the electric power company.
Confer with authorized service station.
Improve the ventilation method.
Confer with authorized service station.
Confer with authorized service station.
Confer with authorized service station.
Tighten the tightening bolts to their proper
torque.
Oil leaks from the input/output
shaft sections.
The output shaft turns without a load
When a load is applied
Oil leakage
Table 28 Troubleshooting
10. Troubleshooting
COMMON
The speed will not increase
and the motor is overheating.
!
The motor runs without a load, but the
output shaft does not rotate.
Damage due to overloading of the gears
and shafts.
Confer with authorized service station.
The motor stops.
Leakage of oil/grease into motor
Damaged oil seal
Confer with authorized service station.
Excessive oil/grease supply
Remove excess oil/grease.
To Next Page
Loading...
