LSIS SV-IS7 User Manual (English)

Questions and Answers:

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Jorge SmithAug 20, 2025
What to do if my LSIS SV-IS7 shows Over Current1?
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  Alexis AdkinsAug 20, 2025
  If your LSIS Inverter displays an Over Current1 error, there are several potential causes. The acceleration or deceleration time might be too short for the load inertia; in this case, increase the acceleration or deceleration time. The inverter load could be greater than its rated capacity, requiring you to replace it with a higher capacity model. It's also possible the inverter supplied output while the motor was idling, so ensure the motor is stopped before operating the inverter, or utilize the speed search function (CON-60). Lastly, check the mechanical brake of the motor, as it might be operating too fast.
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Elizabeth ReynoldsAug 22, 2025
What causes Over Voltage in LSIS Inverter and how to fix it?
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  Stanley YoungAug 22, 2025
  An Over Voltage error in your LSIS Inverter can stem from several factors. The deceleration time might be too short for the load inertia, so try increasing it. A generative load at the inverter output could be the cause, suggesting the use of a braking unit. Also, verify that the input voltage isn't exceeding the specified value. Additionally, ensure the electronic thermal protection level is appropriately set and if the inverter has been operating at a low speed for a long period, consider replacing the motor with one that provides extra power to the cooling fan.
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Alison SparksAug 25, 2025
Why does my LSIS Inverter display Over Load?
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  Anna LoganAug 25, 2025
  Your LSIS Inverter might be showing an Over Load error because the load is exceeding the motor's rated capacity. Ensure that both the motor and inverter have appropriate capacity ratings. Alternatively, the set value for the overload trip level (PRT-21) might be too low; in that case, increase the set value.
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powellkaylaAug 26, 2025
What to do if LSIS SV-IS7 Inverter shows Low Voltage /Low Voltage2?
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  Dr. Michelle JenkinsAug 26, 2025
  If your LSIS Inverter is showing a Low Voltage /Low Voltage2 error, it could be due to a few reasons. First, check if the input voltage is below the specified value. Another cause might be a load connected to the system that exceeds the power capacity, such as a welder or direct motor connection; in this case, increase the power capacity. Finally, the magnetic contactor connected to the power source might have a faulty connection, requiring its replacement.
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cheryl53Aug 27, 2025
How to troubleshoot an E-Thermal error on an LSIS SV-IS7?
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  charlespageAug 27, 2025
  An E-Thermal error on your LSIS Inverter indicates that the motor has overheated. Try reducing the load or operation frequency. It could also mean that the inverter load is greater than its rated capacity, in which case you should replace the inverter with a model that has increased capacity.
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Kenneth HernandezAug 29, 2025
How to fix Over Heat error on LSIS Inverter?
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  Kimberly MillerAug 29, 2025
  If your LSIS Inverter is showing an Over Heat error, it could be due to a few reasons: * There may be a problem with the cooling system, so check for any obstructions blocking the air inlet, outlet, or vent. * The inverter cooling fan might have been operating for an extended period, requiring its replacement. * The ambient temperature could be too high; ensure it remains below 50?.
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davidosborneAug 31, 2025
What causes LSIS Inverter to Ground Trip?
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  John EscobarAug 31, 2025
  A Ground Trip error in your LSIS Inverter can be caused by a ground fault in the inverter output wiring, so check the output wiring. It could also indicate that the motor insulation is damaged, requiring you to replace the motor.
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Lisa KelleySep 2, 2025
What causes Inverter OLT on LSIS SV-IS7?
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  Christina HancockSep 2, 2025
  An Inverter OLT error on your LSIS Inverter can occur if the load is greater than the rated motor capacity, suggesting you replace the motor and inverter with models that have increased capacity. Alternatively, the torque boost level might be set too high, so try reducing it.
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Kevin DiazSep 4, 2025
What does Out Phase Open mean on my LSIS Inverter?
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  Teresa BeasleySep 4, 2025
  If your LSIS Inverter displays an Out Phase Open error, it suggests that the magnetic contactor on the output side has a connection fault. Check the magnetic contactor. It could also mean that the output wiring is faulty, so check the output wiring as well.
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Nancy BurtonSep 6, 2025
What does In Phase Open mean on my LSIS SV-IS7?
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  ojacobsSep 6, 2025
  If your LSIS Inverter displays an In Phase Open error, it indicates a connection fault with the magnetic contactor on the input side. Check the magnetic contactor. It could also mean the input wiring is faulty, so check the input wiring. Also, the DC link capacitor might need replacement. In this case, contact the retailer or LSIS Customer Support.