7 Troubleshooting
7-1 In case of tripping
In the event the drive tripping, diagnose by the help of the alarm display as shown below.
(1) Overcurrent (OC)
Overcurrent dur- | Overcurrent during | Overcurrent while run- |
ing acceleration | deceleration OC2 | ning at constant speed |
OC1 |
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No
Can torque boost amount be re- duced?
yes
Reduce torque boost amount.
Prolong time set- ting.
yes
Are the motor connecting terminal (U,V,W)
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| yes |
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| Load excessive? |
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No |
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| Torque boost amount |
| Deceleration time |
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| correct? |
| setting too short |
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| compared with load? |
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| yes |
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| Has load changed | No |
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| Acceleration time |
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| setting too short | No | yes |
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| yes |
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| compared with load? |
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| yes |
| Can the deceleration |
| yes |
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yes |
| time setting be pro- |
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| Can the acceleration |
| longed? |
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| time setting be pro- |
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| longed? |
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| No |
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| No |
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Remove short-circuit or ground.
Reduce load or expand drive capacity.
Faulty drive or error because of noise. Con- tact GE Fuji.
Prolong time setting.
| Reduce load or ex- |
| Braking method |
| Suppress load fluctuation |
| pand drive capacity. |
| needs investigation. |
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| or expand drive capacity. | ||
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| Consult with GE Fuji. |
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