Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 386

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