16
9. Troubleshooting
17
9. Troubleshooting
If any abnormal condition occurs, refer to Table 9-1, 9-2 and promptly take appropriate measures. If
these actions do not solve the issue, immediately contact the nearest authorized maintenance shop.
Table 9-1 Troubleshooting
Problem
Cause
Correction
The motor will not operate under no load
Power failure
Confirm battery and other power supplies.
Defective electric circuit
Check the circuit.
Blown fuse
Replace the fuse.
Protective device operates
Fix the problem and re-operate.
Load locking
Check the load and safety device.
Poor switch contact
Adjust the contact unit.
Motor stator coil disconnect
Confer with authorized maintenance shop.
Bearing damage
Confer with authorized maintenance shop.
The motor rotates with no load, but the
output shaft and frame do not rotate
Damage to gear unit due to overloading
of gears, etc.
Confer with authorized maintenance shop.
The slo
w speed shaf
t r
ota
tes with no load
W
hen a load is applied
The switch overheats
Insufficient switch capacity
Replace with a specified switch.
Overload
Decrease the load to the specified value.
Fuse tripping
Insufficient fuse capacity
Replace with a specified switch.
Overload
Decrease the load to the specified value.
The speed will not increase
and the motor is overheating.
Voltage drop
Confirm battery and other power supplies.
Overload
Decrease the load to the specified value.
Short-circuited motor stator coil
Confer with authorized maintenance shop.
It stops.
Bearing burnout
Confer with authorized maintenance shop.
Poor adjustment of protection device
Adjust the protection device.
The motor runs in the reverse di-
rection.
Wiring error
Change the connection.
Fuse tripping
The lead wire is short-circuited
Confer with authorized maintenance shop.
Poor contact between motor and starter Make complete connection.
Excessive temperature rise
Overload
Decrease the load to the specified value.
Voltage drop or rise
Confirm battery and other power supplies.
The ambient temperature is high
Improve the ventilation method.
Damaged bearing
Confer with authorized maintenance shop.
Abnormal wear of reducer parts due to
overload. etc.
Confer with authorized maintenance shop.
Gr
ease leak
age
Oil and fat blot or drip from the oil
seal.
Grease applied to the oil seal seeps out
at first.
Wipe off around the oil seal, and observe.
Grease leaks from the oil seal.
Damaged oil seal or damaged output
shaft (or frame)
Confer with authorized maintenance shop.
Leakage of grease from the mating
faces of the frame, cover, etc.
Loose fastener bolts
Tighten fastener bolts correctly.
Grease leaks into motor.
Damaged oil seal
Confer with authorized maintenance shop.
Abnormal sound
Excessive vibration
Dust and foreign matter in bearings, or
damaged bearings
Confer with authorized maintenance shop.
Reducer parts grinding on foreign matter Confer with authorized maintenance shop.
Reducer parts are damaged
Confer with authorized maintenance shop.
Warping of casing because the installa-
tion surface is not flat
Make the installation base flat or make
adjustment by using liners, etc.
Resonance due to insufficient rigidity of
the installation base
Reinforce the installation base to in-
crease rigidity.
Nonalignment of the shaft center with
the AGV main unit
Align the center of axle.
Transmission of vibration from the AGV
main unit
Individually operate the product to
check the source of the sound.
