MITSUBISHI ELECTRIC Merservo MR-J2S- B - Manual (Page 138)

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9. TROUBLESHOOTING
Display Name Definition Cause Action
1. Regenerative option is not used. Use the regenerative option.
2. Though the regenerative option is
used, the parameter No. 2 setting
is " 00 (not used)".
Make correct setting.
3. Lead of built-in regenerative
resistor or regenerative option is
open or disconnected.
1. Change the lead.
2. Connect correctly.
4. Regenerative transistor faulty. Change the servo amplifier.
5. Wire breakage of built-in
regenerative resistor or
regenerative option
1. For wire breakage of built-in
regenerative resistor, change the servo
amplifier.
2. For wire breakage of regenerative
option, change the regenerative option.
6. Capacity of built-in regenerative
resistor or regenerative option is
insufficient.
Add regenerative option or increase
capacity.
7. Power supply voltage high. Review the power supply.
33 Overvoltage Converter bus
voltage exceeded
400VDC.
8. Ground fault occurred in servo
amplifier output phases U, V and W.
Correct the wiring.
9. The jumper across BUE-SD of the
FR-BU2 brake unit is removed.
Fit the jumper across BUE-SD.
1. Bus cable disconnected. Connect correctly.
2. Bus cable fault Change the cable.
3. Noise entere bus cable. Take measures against noise.
4. Termination connector
disconnected.
Connect termination connector.
34 CRC error Bus cable is faulty
5. The same No. exists in the servo
amplifier side axis setting.
Set correctly.
1. Command given is greater than
the maximum speed of the servo
motor.
Review operation program.
2. Noise entered bus cable. Take action against noise.
35 Command
frequency error Input frequency of
command pulse is
too high.
3. Servo system controller failure Change the servo system controller.
1. Bus cable is disconnected. Connect the connector of the bus cable.
2. Bus cable fault. Change the cable.
3. Printed board is faulty. Change the servo amplifier.
36 Transfer error Bus cable or printed
board is faulty
4. Terimination connector
disconnected
Connect termination connector.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
Change the servo amplifier.
2. There is a parameter whose value
was set to outside the setting
range by the controller.
Change the parameter value to within the
setting range.
37 Parameter
error Parameter setting is
wrong.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Change the servo amplifier.
1. Servo amplifier faulty. Change the servo amplifier.
2. The power supply was turned on
and off continuously by overloaded
status.
The drive method is reviewed.
45 Main circuit
device overheat Main circuit device
overheat
3. Air cooling fan of servo amplifier
stops.
1. Change the servo amplifier or cooling
fan.
2. Reduce ambient temperature.