Mitsubishi Electric MDS-EX-CVP Series Technical Specification And Instruction Manual page 66

MDS-EX-CVP Series Specifications and Instruction Manual
10. Troubleshooting
Alarm No.
68
Investigation details
1 Check the repeatability.
Check if there is any abnormality in the unit's ambient
2 environment.
(Ex. Noise, grounding, etc.)
Alarm No.
69
Investigation details
Measure the insulation across the power cables
1 (U,V,W) for all motors and the ground. (Carry out a
megger test.)
2 Has oil adhered on the motor or power cable?
3 Measure the insulation again.
Measure the resistance across the U, V, W phase
terminals of the servo/spindle drive unit and the ground.
4
(Note) Do not measure the insulation as the unit is
damaged.
Check whether there is any axis in which alarm 24 has
5
occurred.
Alarm No.
6A
Investigation details
Check whether any alarm has occurred on the drive unit
1
side.
2 Check whether the contactor's contact has melted.
Check that the contactor excitation wiring is correctly
3
connected from the power supply unit's MC1 terminal.
Alarm No.
6B
Investigation details
Check whether any alarm has occurred on the drive unit
1
side.
2 Check the repeatability.
3 Check if there is any ground fault in the motor.
Check if there is any abnormality in the unit's ambient
4 environment.
(Ex. Noise, grounding, etc.)
Power supply: Watchdog
The system does not operate correctly. LED display is fixed as "8".
The alarm occurs each time READY is turned
ON.
The alarm occurs occasionally.
Take remedies according to the causes of the abnormality in the ambient environment.
Power supply: Grounding
The motor power cable is in contact with FG (Frame Ground).
Less than 1 MΩ. (Grounding)
1 MΩ or more. (Normal)
Oil has adhered.
Oil has not adhered.
Less than 1 MΩ. (Grounding)
1 MΩ or more. (Normal)
Less than 100 kΩ.
100 kΩ or more.
There is an axis in which alarm has occurred.
There is no axis in which alarm has occurred.
Power supply: External contactor welding
A contact of the external contactor is welding.
An alarm has occurred.
An alarm has not occurred.
The contactor has melted.
The contactor has not melted.
The connection is correct.
The connection is incorrect.
Power supply: Rush circuit error
A thyristor for rush short circuit is ON when rushing.
An alarm has occurred.
An alarm has not occurred.
The alarm occurs each time READY is turned
ON.
The alarm occurs occasionally.
Check the investigation item of Alarm No. 69.
No ground fault.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
Investigation results
Investigation results
Investigation results
41
Remedies
Replace the unit.
Check the investigation item No. 2.
Remedies
The motor or power cable may be
ground faulted.
Check the investigation item No. 2.
Take measures so that oil does not
come in contact. Check the motor's
cannon connector and the inside of the
terminal box, and clean as necessary.
Check the investigation item No. 3.
Replace the motor or cable.
Check the investigation item No. 2.
Replace the drive unit.
Replace the power supply unit.
Check the alarm No. "24" items.
Check the investigation item No. 2.
Remedies
Remove the cause of the alarm on the
drive side, and check the investigation
item No. 2.
Check the investigation item No. 2.
Replace the contactor.
Check the investigation item No. 3.
Correctly connect.
Replace the power supply unit.
Remedies
Remove the cause of the alarm on the
drive side, and then carry out the
investigation details 2.
Check the investigation item No. 2.
Replace the unit.
Check the investigation item No. 3.
Take remedies of Alarm No. 69.
Check the investigation item No. 4.
IB-1501587-A