11 - 13
11. TROUBLESHOOTING
Display Name
Definition
Cause
Action
(Note 2)
Alarm
detailed
information
A46 Servo
motor
overheat
Servo motor
temperature rise
actuated the
thermal sensor.
1. Ambient temperature of servo motor
is over 40 (104 ).
Check environment so that
ambient temperature is 0 to
40 (32 to 104 ).
1, 2,
10, 20
2. Servo motor is overloaded.
1. Reduce the load.
2. Check operation pattern.
3. Use servo motor that
provides larger output.
3. Thermal sensor in encoder is faulty.
Change the servo motor.
1
A47 Cooling
fan
alarm
The cooling fan of
the servo amplifier
stopped, or its
speed decreased
to or below the
alarm level.
1. Cooling fan life expiration (Refer to
section 2.5.)
Change the cooling fan of
the servo amplifier.
2. Foreign matter caught in the cooling
fan stopped rotation.
Remove the foreign matter.
3. The servo amplifier failed.
Change the servo
amplifier.
A50 Overload
1 Load
exceeded
overload protection
characteristic of
servo amplifier.
1. Servo amplifier is used in excess of
its continuous output current.
1. Reduce the load.
2. Check operation pattern.
3. Check if the
electromagnetic brake is
released.
4. Check the friction of
machine.
5. Use a servo amplifier
and a servo motor that
provide larger output.
1
2. After Overload 2 (A51) occurred and
the alarm was cleared by the power
supply turned OFF and ON, the
overload operations have been
repeated.
1. Reduce the load.
2. Check operation pattern.
3. Use a servo motor that
provides larger output.
1
3. Servo system is instable, causing
hunting and vibration.
1. Repeat
acceleration/deceleratio
n to execute auto tuning.
2. Change auto tuning
response setting.
3. Set auto tuning to OFF
and make gain
adjustment manually.
4. Check the coupling with
servo motor shaft for
looseness.
1, 2
4. Encoder faulty.
<Check method>
When the servo motor shaft is rotated
with the servo-off, the cumulative
feedback pulses do not vary in
proportion to the rotation angle of the
shaft but the indication skips or
returns midway.
Change the servo motor.
Summary of Contents for Melservo-J3 Series MR-J3-B
Page 19: ...10 MEMO ...
Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
Page 793: ...App 38 APPENDIX MEMO ...
Page 799: ...MEMO ...