9 - 6
9. TROUBLESHOOTING
Display Name
Definition
Cause
Action
1. Servo amplifier faulty.
Change the servo amplifier.
2. The power supply was turned on
and off continuously by overloaded
status.
The drive method is reviewed.
3. Ambient temperature of servo
motor is over 55 .
Review environment so that ambient
temperature is 0 to 55 .
AL.45 Main
circuit
device
overheat
Main circuit device
overheat
4. Used beyond the specifications of
close mounting.
Use within the range of specifications.
1. Ambient temperature of servo
motor is over 40 .
Review environment so that ambient
temperature is 0 to 40 .
2. Servo motor is overloaded.
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
output.
AL.46 Servo
motor
overheat
Servo motor
temperature rise
actuated the thermal
sensor.
3. Thermal sensor in encoder is
faulty.
Change servo motor.
Cooling fan life expiration (Refer to
section 2.5.)
Change the cooling fan of the servo
amplifier.
Foreign matter caught in the fan
stopped rotation.
Remove the foreign matter.
AL.47 Cooling
fan
alarm
The cooling fan of
the servo amplifier
stopped, or its
speed decreased to
or below the alarm
level.
The power supply of the cooling fan
failed.
Change servo amplifier.
AL.50 Overload
1
Load
exceeded
overload protection
characteristic of
servo amplifier.
1. Servo amplifier is used in excess
of its continuous output current.
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
output.
2. Servo system is instable and
hunting.
1. Repeat acceleration/
deceleration to execute auto tuning.
2. Change auto tuning response setting.
3. Set auto tuning to OFF and make gain
adjustment manually.
3. Machine struck something.
1. Review operation pattern.
2. Install limit switches.
5. Encoder faulty.
Checking method
When the servo motor shaft is
rotated with the servo off, the
cumulative feedback pulses do not
vary in proportion to the rotary angle
of the shaft but the indication skips
or returns midway.
Change the servo motor.
6. After Overload 2 (AL.51) occurred,
turn OFF/ON the power supply to
clear the alarm. Then the overload
operation is repeated.
1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
output.
Summary of Contents for MELSERVO MR-J3 A Series
Page 15: ...A 14 MEMO ...
Page 225: ...7 12 7 GENERAL GAIN ADJUSTMENT MEMO ...
Page 241: ...8 16 8 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 251: ...9 10 9 TROUBLESHOOTING MEMO ...
Page 263: ...10 12 10 OUTLINE DRAWINGS MEMO ...