Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 234

8. TROUBLESHOOTING
Alarm No.: A.45 Name: Main circuit device overheat
Description
Detailed Detailed
display Name
45.1 Board 1) Ambient temperature is
temperature
error
2) Used beyond the
3) The power was turned on
4) Heat sink and opening are
5) Servo amplifier fault
Alarm No.: A.46 Name: Servo motor overheat
Description
Detailed Detailed
display Name
46.1 Servo motor 1) Ambient temperature of the
temperature
error
2) Servo motor is overheated. Check the effective
3) Thermal sensor fault in the
Overheat in servo amplifier.
Cause
over 55 .
specifications of close
mounting.
and off continuously in
overloaded status.
clogged.
Servo motor is overheated.
Cause
servo motor is over 40 .
encoder.
Checking method
Check if the ambient Ambient
temperature is 55 or temperature is over
less. 55 .
Ambient
temperature is 55
or less.
Check the Used beyond the
specifications of close specifications.
mounting.
Satisfying the
specifications.
Check if the overloaded Occurred
status occurred repeatedly.
repeatedly.
Not occurred.
Check if the alarm Alarm does not
occurs after cleaning occur.
the heat sink and the
Alarm occurs.
opening.
Check if the alarm Alarm does not
occurs after replacing occur.
the servo amplifier.
Checking method
Check the ambient Ambient temperature
temperature of the is over 40 .
servo motor.
Ambient temperature
is 40
The effective load
load ratio using the ratio is too high.
status display or MR
The effective load
Configurator.
ratio is small
Check the temperature The temperature of
of the servo motor. the servo motor is
low.
8 - 17
Result Action
Lower the ambient
temperature.
Check 2).
Use within the range of
specifications.
Check 3).
Check operation pattern.
Check 4).
Clean periodically.
Check 5).
Use the normal servo
amplifier.
Result Action
Lower the ambient
temperature of servo
motor.
Check 2).
or less.
Reduce the load or take
heat dissipation measures.
Check 3).
Replace the servo motor.