Vaidnor VDF730 Series User Manual (English)

Questions and Answers:

C
Charles EstesSep 14, 2025
Why there is no display at power-on on Vaidnor VDF730 DC Drives?
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  Teresa AustinSep 15, 2025
  If your Vaidnor DC drive shows no display at power-on, it could be because there is no power supply to the AC drive or the power input to the AC drive is too low, so check the power supply. The cable connecting the control board and the drive board and the operation panel might be broken, so re-connect the 8-core and 16-core cables. If components inside the AC drive are damaged, contact the agent or vendor for technical support.
D
dennis56Aug 25, 2025
Why is my Vaidnor VDF730 DC Drives showing overvoltage during deceleration?
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  joneslauraAug 25, 2025
  If your Vaidnor DC drive displays overvoltage during deceleration, it could be due to several factors. The input voltage might be too high, so adjust it to the normal range. Also, an external force might be driving the motor during deceleration; cancel this force or install a braking resistor. The deceleration time could be too short, so increase it. Finally, the braking unit and braking resistor might not be installed, so install them.
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William LangAug 25, 2025
What to do if Vaidnor DC Drives has overcurrent during deceleration?
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  kyle48Aug 26, 2025
  If your Vaidnor DC drive is showing an overcurrent during deceleration, there are several potential causes. The output circuit could be grounded or short-circuited, so you should eliminate any external faults. The deceleration time might be too short, so increase it. The voltage might be too low, so adjust it to the normal range. A sudden load could be added during deceleration, so remove the added load. Finally, the braking unit and braking resistor might not be installed, so install them.
B
Brian SullivanAug 27, 2025
Why is my Vaidnor DC Drives showing undervoltage?
- E
  Elizabeth HallAug 27, 2025
  If your Vaidnor DC drive is experiencing an undervoltage issue, it could be due to several reasons. There might be an instantaneous power failure on the input power supply, in which case you should reset the fault. The AC drive's input voltage might not be within the allowable range, so adjust the voltage to the normal range. If the bus voltage is abnormal, contact the agent or vendor.
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Nicole WilcoxAug 27, 2025
What causes overvoltage during acceleration in Vaidnor VDF730 DC Drives?
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  James SmithAug 27, 2025
  If your Vaidnor DC drive is experiencing overvoltage during acceleration, it could be due to several reasons. The input voltage might be too high, so adjust the voltage to the normal range. An external force might be driving the motor during acceleration; cancel the external force or install a braking resistor. The acceleration time might be too short, so increase it. The braking unit and braking resistor might not be installed, so install them.
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Mary NolanSep 10, 2025
What causes motor switchover fault during running in Vaidnor DC Drives?
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  warnercourtneySep 10, 2025
  If your Vaidnor DC drive is reporting motor switchover fault during running, it is because motor switchover is performed via terminal during running of the AC drive. Perform motor switchover after the AC drive stops.
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fitzgeraldrichardSep 8, 2025
What causes current detection fault in Vaidnor VDF730?
- S
  Sean JohnsonSep 8, 2025
  If your Vaidnor DC drive is experiencing a current detection fault, it could be because the HALL device is faulty, so replace the faulty HALL device. The drive board might be faulty, so replace the faulty drive board.
S
scotthunterSep 9, 2025
How to resolve motor auto-tuning fault in Vaidnor DC Drives?
- K
  Kyle StewartSep 9, 2025
  If your Vaidnor DC drive is experiencing a motor auto-tuning fault, it could be because the motor parameters are not set according to the nameplate, so set the motor parameters according to the nameplate properly. The motor auto-tuning might time out, so check the cable connecting the AC drive and the motor.
P
Patty BrownSep 2, 2025
What causes power output phase loss in Vaidnor DC Drives?
- S
  sriceSep 2, 2025
  If your Vaidnor DC drive has a power output phase loss, it could be due to a faulty cable connecting the AC drive and the motor, so eliminate external faults. The AC drive's three-phase outputs might be unbalanced when the motor is running, so check whether the motor three-phase winding is normal. The drive board might be faulty, so contact the agent or vendor.
M
Mary ClarkAug 31, 2025
What causes module overheat in Vaidnor VDF730 DC Drives?
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  Tara NolanAug 31, 2025
  If your Vaidnor DC drive reports a module overheat, it could be due to several reasons. The ambient temperature might be too high, so lower the ambient temperature. The air filter might be blocked, so clean the air filter. The fan might be damaged, so replace the damaged fan. The thermally sensitive resistor of the module might be damaged, so replace the damaged thermally sensitive resistor. The inverter module might be damaged, so replace the inverter module.

Vaidnor VDF730 Series Specifications

General

Brand	Vaidnor
Model	VDF730 Series
Category	DC Drives
Language	English

Summary

Safety Information and Precautions

Safety Information

Covers safety grades and precautions for different stages of use: before installation, during installation, wiring, and after power-on.

Mechanical and Electrical Installation

Mechanical Installation

Covers installation environment requirements and clearance specifications for proper mechanical setup of the AC drive.

Electrical Installation

Details the selection of peripheral electrical devices, description of devices, wiring methods, terminal layouts, and main circuit terminal descriptions.