Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 160

8. TROUBLESHOOTING
Alarm No.45
Alarm description
Display Name
45.1 Main circuit
abnormal
temperature
45.5 Board
temperature error
Alarm No.46
Alarm description
Display Name
46.1 Encoder thermal
sensor error
Name: Main circuit device overheat
Inside of the servo amplifier overheats.
Cause
(1) Surrounding air
temperature is over 55 .
(2) Specification of close
mounting is not met.
(3) The power supply was
turned on and off
continuously by
overloaded status.
(4) Foreign matter caught in
cooling fan or heat sink.
(5) Servo amplifier is faulty.
(1) Surrounding air
temperature is over 55 .
(2) Specification of close
mounting is not met.
(3) The power supply was
turned on and off
continuously by
overloaded status.
(4) Foreign matter caught in
cooling fan or heat sink.
(5) Servo amplifier is faulty.
Name: Servo motor overheat
Servo motor overheats abnormally.
Cause
(1) Surrounding air
temperature of the servo
motor is over 40 .
(2) Servo motor is
overloaded.
(3) Thermal sensor in
encoder is faulty.
Stop method: All axes stop
Checkpoint
Check that surrounding Surrounding air
air temperature is 55 or temperature is over
less. 55 .
Surrounding air
temperature is 55
less.
Check the specification of Specification not met.
close mounting.
Specification met.
Check if overloaded Occurred many times.
status occurred many
times.
Did not occur.
Clean the cooling fan and Not reproduced.
heat sink, and check the
reproducibility of the error. Reproduced.
Replace the servo Not reproduced.
amplifier and check the
reproducibility of the error.
Examine checkpoints described in the alarm display "45.1".
Stop method: Corresponding axis stops
Checkpoint
Check the surrounding air Surrounding air
temperature of the servo temperature is over
motor. 40 .
Surrounding air
temperature is 40
less.
Check the effective load Effective load ratio is
ratio with MR large.
Configurator.
Effective load ratio is
small.
Check the motor Motor temperature is
temperature at alarm low.
occurrence.
8 - 21
Finding Action
Lower the surrounding
air temperature.
Check (2).
or
Use according to the
specification.
Check (3).
Review the operation
method.
Check (4).
Clean periodically.
Check (5).
Use a properly
operating servo
amplifier.
Finding Action
Lower the surrounding
air temperature of the
servo motor.
Check (2).
or
Reduce the load or
review the operation
method.
Check (3).
Replace the servo
motor.