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10. Troubleshooting
10 - 10
Alarm No.
2C
Motor side detector: EEPROM/LED error:
LED deterioration was detected with the motor side detector.
Cause of occurrence Investigation items Remedy
1
Carry out items for alarm No. 2B.
Alarm No.
2D
Motor side detector: Data error:
A data error was detected with the motor side detector.
Cause of occurrence Investigation items Remedy
1
Carry out items for alarm No. 2B.
Alarm No.
2F
Motor side detector: Communication error:
An error was detected in the communication with the motor side detector. Or, the communication was cut
off.
Cause of occurrence Investigation items Remedy
Is the detector cable shielded and
connected to FG?
Check the cable shield.
Is the detector cable wired in the same
conduit as the motor's power cable or
are the two cables laid in parallel near
each other?
Do not wire the detector cable and
motor's power cable in the same path.
1
Electromagnetic noise
Is the motor FB wire connected only to
the drive unit to be driven? (Is one-point
grounding used?)
Connect the motor FG wire to the drive
unit, and ground to one point with the
drive unit.
2
Carry out items for alarm No. 18.
Alarm No.
30
Over regeneration:
Over-regeneration detection level became over 100%. The regenerative resistor is overloaded.
Cause of occurrence Investigation items Remedy
1
Regenerative resistor selection is
incorrect.
Check the regeneration capacity again. Change the regeneration resistor.
2
Parameter setting is incorrect.
Check the SV036 setting. Correctly set the parameters.
3
Regenerative resistor connection is
incorrect.
Check the regenerative resistor
connection.
Is the 3-unit parallel connection
connected in serial?
Correctly wire.
4
Power voltage is high.
The regeneration constantly activates
when the power voltage is 260V or more.
Review the power supply.
(Note) PR resetting is not possible when the regeneration level is 50% or more. Do not forcibly reset (AR) by turning the unit
power OFF. If AR resetting is used at 50% or higher, the level is set to 80% when the power is turned ON next.