Sako V780 - User Manual

Questions and Answers

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Joshua GregoryAug 29, 2025
Why Sako V780 shows overvoltage during acceleration?
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  Jill WilliamsAug 30, 2025
  If your Sako Inverter experiences overvoltage during acceleration, check the following: * The input voltage might be too high: Adjust the voltage to the normal range. * An external force could be driving the motor during acceleration: Cancel the external force or install a braking resistor. * The acceleration time may be too short: Increase the acceleration time. * The braking unit and braking resistor might not be installed: Install the braking unit and braking resistor.
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Christopher RobertsAug 28, 2025
What to do for overvoltage during deceleration in Sako Inverter?
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  Rodney RamosAug 29, 2025
  If your Sako Inverter experiences overvoltage during deceleration, consider the following: * The input voltage may be too high: Adjust the voltage to the normal range. * An external force might be driving the motor during deceleration: Cancel the external force or install the braking resistor. * The deceleration time could be too short: Increase the deceleration time. * The braking unit and braking resistor might not be installed: Install the braking unit and braking resistor.
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Karen ThomasAug 27, 2025
What causes frequent Err14 IGBT overheat fault on Sako V780?
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  Daniel BradleyAug 27, 2025
  If your Sako Inverter displays Err14 (IGBT overheat) frequently, it could be due to: * The carrier frequency setting being too high: Reduce the carrier frequency (P0-15). * A damaged cooling fan or blocked air filter: Replace the fan and clean the air filter. If the issue persists, it may indicate damaged components inside the AC drive, such as the thermal coupler, in which case you should contact technical support.
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Savannah BarnesAug 27, 2025
Why Sako Inverter shows overcurrent during deceleration?
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  Leah RichmondAug 27, 2025
  If your Sako Inverter is experiencing overcurrent during deceleration, there are several potential causes: * The output circuit could be grounded or short-circuited: You should eliminate any external faults. * Motor auto-tuning may not have been performed: Perform the motor auto-tuning. * The deceleration time might be too short: Increase the deceleration time. * The voltage could be too low: Adjust the voltage to the normal range. * A sudden load might have been added during deceleration: Remove the added load. * The braking unit and braking resistor may not be installed: Install the braking unit and braking resistor.
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Kristin BensonAug 25, 2025
How to fix IGBT overheat on Sako V780 Inverter?
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  Ana RossAug 26, 2025
  If your Sako Inverter shows an IGBT overheat fault, it could be due to several reasons: * The ambient temperature is too high: Lower the ambient temperature. * The air filter is blocked: Clean the air filter. * The fan is damaged: Replace the damaged fan. * The thermally sensitive resistor of the IGBT is damaged: Replace the damaged thermally sensitive resistor. * The AC drive IGBT is damaged: Replace the AC drive IGBT.
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ywilsonAug 25, 2025
What to do if Sako V780 Inverter shows overcurrent during acceleration?
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  jonesjessicaAug 25, 2025
  If your Sako Inverter is experiencing overcurrent during acceleration, it might be due to: * A grounded or short-circuited output circuit: Address any external faults. * Improper motor auto-tuning: Perform motor auto-tuning. * A too-short acceleration time: Increase the acceleration time. * Inappropriate manual torque boost or V/F curve: Adjust these settings accordingly. * Low voltage: Adjust the voltage to the normal range. * Starting operation on a rotating motor: Select rotational speed tracking restart, or wait for the motor to stop before starting. * Sudden load added during acceleration: Remove the added load. * Insufficient AC drive power class: Select an AC drive with a higher power class.