Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 44

1. TROUBLESHOOTING
Alarm No.: 46 Name: Servo motor overheat
Alarm content
Detail
Detail name
No.
46.2 Abnormal (1)
temperature of
servo motor 2
(2)
46.3 Thermistor (1)
disconnected
error
(2)
(3)
46.5 Abnormal Check it with the check method for [AL. 46.1].
temperature of
servo motor 3
46.6 Abnormal (1) A current was applied to
temperature of
servo motor 4
Alarm No.: 47 Name: Cooling fan error
Alarm content
Detail
Detail name
No.
47.1 Cooling fan stop (1)
error
(2) Cooling fan life expired. Check if the cooling
47.2 Cooling fan (1)
speed reduction
error
(2) Cooling fan life expired. Check the cooling fan
The servo motor overheated.
Cause
Ambient temperature of Check the ambient
the linear servo motor or temperature of the
direct drive motor has linear servo motor or
exceeded 40 °C. direct drive motor.
The linear servo motor Check the effective
or direct drive motor has load ratio.
been under overload
status.
A thermistor wire is not Check the thermistor
connected. wire.
The encoder cable MR- Check the model of
ENECBL_M-H for HF- the encoder cable.
JP servo motors is used
for the HG-JR22K1M(4)
servo motor.
The thermistor wire is Check the thermistor
disconnected. wire.
Check the effective
the servo amplifier in load ratio.
excess of its continuous
output current.
The speed of the servo amplifier cooling fan decreased.
Or the fan speed decreased to the alarm occurrence level or less.
Cause
Foreign matter was Check if a foreign
caught in the cooling matter is caught in the
fan. cooling fan.
fan is stopping.
Foreign matter was Check if a foreign
caught in the cooling matter is caught in the
fan. cooling fan.
speed.
Check method Check result
It is over 40 °C.
It is less than 40 °C.
The effective load
ratio is large.
The effective load
ratio is small.
It is not connected.
It is connected.
MR-ENECBL_M-H is
used.
MR-ENECBL_M-H-
MTH is used.
It is disconnected.
It is not disconnected. Replace the servo
The effective load
ratio is high.
Check method Check result
Something has been
caught.
Nothing has been
caught.
It is stopping.
Something has been
caught.
Nothing has been
caught.
The fan speed is less
than the alarm
occurrence level.
1 - 37
Action Target
Lower the ambient [A]
temperature. [B]
[WB]
Check (2).
Reduce the load or
review the operation
pattern.
Replace the servo
motor.
Connect it correctly.
Check (2).
Change it to MR-
ENECBL_M-H-MTH.
Check (3).
Repair the lead wire.
motor.
[A]
[B]
[WB]
[RJ010]
Reduce the load or
review the operation
pattern. Or use a
larger capacity motor.
Action Target
Remove the foreign [A]
matter. [B]
[WB]
Check (2).
[RJ010]
Replace the servo
amplifier.
Remove the foreign
matter.
Check (2).
Replace the servo
amplifier.