Troubleshooting
Troubleshooting Maintenanceand |
| Symptom/condition | Probable Cause | Solution | ||
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| speed). | • If using the analog input, is the | (reduces output as needed). | ||
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| • Check the wiring. | |
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| current or voltage at [O] or [OI]? | • Check the potentiometer or |
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| signal generating device. |
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| • Is the load too heavy? | • Reduce the load. |
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| The motor speed will not reach |
| • Heavy loads activate the | ||
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| the target frequency (desired |
| overload restriction feature | ||
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| • Is the inverter internally limiting | • Check max frequency |
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| the output frequency? | setting (A004) |
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| • Check frequency upper limit |
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| setting (A061) |
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| • Is the load fluctuation too great? | • Increase the motor capacity |
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| (both inverter and motor). |
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| The rotation is unstable. | • Is the supply voltage unstable? | • Fix power supply problem. | ||
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| • Is the problem occurring at a partic- | • Change the output frequency | |||
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| ular frequency? | slightly, or use the jump |
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| frequency setting to skip the |
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| problem frequency. |
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| The RPM of the motor does not | • Is the maximum frequency setting | • Verify the V/f settings match | ||
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| match the inverter output | A004 correct? | motor specifications. | ||
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| frequency setting. | • Does the monitor function D001 | • Make sure all scaling (such | ||
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| display the expected output | as A011 to A014) is |
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| frequency? | properly set. |
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| • Was power turned OFF after a | • Edit the data and press the |
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| parameter edit but before pressing | Store key once. |
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| No downloads | the Store key? |
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| • Edits to data are permanently | • Wait six seconds or more | |
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| Inverter data | have occurred. | |||
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| stored at power down. Was the time | before turning power OFF | ||
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| is not |
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| from power OFF to power ON less | after editing data. |
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| correct. |
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| than six seconds? |
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| A download to | • Was the power turned OFF within | • Copy the data to the inverter |
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| the inverter was | six seconds after the display | again, and keep power ON |
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| attempted. | changed from REMT to INV? | for six seconds or more after |
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| copying. |
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| A parameter | True for certain | • Is the inverter in Run Mode? Some | • Put inverter in Stop Mode | |
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| parameters | parameters cannot be edited during | (press the Stop/reset key). | ||
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| will not |
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| Run Mode. | Then edit the parameter. | |
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| change after |
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| an edit |
| True for all | • If you’re using the [SFT] intelligent | • Change the state of the SFT |
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| (reverts to |
| parameters | input (software lock | input, and check the B031 |
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| old setting). | ||||
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| the [SFT] input ON? | parameter (SFT mode). | ||
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