Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

Page: 386 / 500

14. USING A DIRECT DRIVE MOTOR
14 - 53
Alarm No.: 46 Name: Direct drive motor overheat Stop system: Each axis
Alarm content The direct drive motor overheated.
Display Detail name Cause Check method Check result Action
46.1 Encoder
thermal sensor
error
Same as for the rotary servo motors.
Refer to section 8.3.
It is over 40 . Lower the ambient
temperature of the direct
drive motor. 1) Ambient temperature of the
direct drive motor has
exceeded 40 .
Check the ambient
temperature of the
direct drive motor.
It is 40 or less. Check 2).
The effective load
ratio is large. Reduce the load or review
the operation pattern. 2) The direct drive motor has
been under overload
status.
Check the effective load
ratio.
The effective load
ratio is small. Check 3).
46.2 Direct drive
motor thermal
sensor error
3) The thermal sensor in the
direct drive motor is
malfunctioning.
Check the direct drive
motor temperature
when the alarm occurs. The direct drive
motor temperature is
low. Replace the direct drive
motor.
It is not connected. Connect it. 1) A thermistor wire is not
connected.
Check if the thermistor
wire is connected.
It is connected. Check 2).
It is disconnected. Repair the lead wire.
46.3 Thermistor wire
disconnected
error
2) The thermistor wire is
disconnected.
Check the thermistor
wire.
It is not disconnected. Replace the direct drive
motor.
Alarm No.: 47 Name: Cooling fan error Stop system: All axes
Alarm content
The speed of the servo amplifier cooling fan decreased.
The speed decreased to the alarm level or less.
Display Detail name Cause Check method Check result Action
47.1 Cooling fan
stop error
47.2 Cooling fan
speed reduction
error
Same as for the rotary servo motors.
Refer to section 8.3.