Existing reviews of 10 hp (7.5 kW) VFD, Single Phase Input & Output
60Hz source to supply 50Hz condenser unit motors
I intend to use this 10 hp (7.5 kW) VFD, Single Phase Input and output, to power our HVAC outdoor unit compressor and fan rated at 220V 50HZ. Here in Saudi Arabia line voltage is 220V at 60HZ. Is this feasible? Thanks.
From:
Ben
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Date:
27/07/2025
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It's recommended to consult your air conditioner compressor supplier about the inverter control used. In many cases, the compressor has a dedicated inverter, unless your compressor is driven by a general-purpose AC motor. Also, the compressor and fan should not be controlled by the same inverter.
60Hz source to supply 50Hz condenser unit of split-type Aircon
I intend to use this 10 hp (7.5 kW) VFD, Single Phase Input
From:
Ben
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Date:
27/07/2025
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Would it work better to bypass the start winding capacitor and centrifugal switch and just have the start and run winding in the circuit?
If I leave the start winding capacitor and centrifugal switch in the circuit does the drive function all right with the centrifugal switch?
How do I program the led display on the drive so I can toggle (using the double arrow button) between drive output parameters such as frequency, amps, voltage, speed? There is a P7.02 parameter setting but that appears to me that is for RS485 communication hexadecimal input.
With the CI input (4 to 20 ma) can I have an inverse function so that when the 4 to 20 ma input increases the VFD frequency output decreases?
From:
Lilma
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Date:
23/01/2025
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We recommend that you leave the starting winding capacitor and centrifugal switch in the circuit.
The drive unit and centrifugal switch can work normally together, but for single-phase motors we recommend operating at a frequency above 40HZ.
Because the starting winding capacitor and centrifugal switch are not suitable for continuous long-term operation.
The LED display on the drive can be switched between voltage, frequency, and ampere by pressing the >> key
For CI input (4 to 20 mA), if you want the VFD frequency output to decrease when the 4 to 20 mA input increases, you can use the reverse action of the PID parameters to achieve this, using the PID control function.
However, since your motor is a single-phase motor, the PID no-load function is Not suitable for single-phase motors.
How to read the Inverter Fault when OC1 is configured to output it?
I got the e-stop button wiring figured out. I tried to do both a terminal stop command and a VFD Run Prohibit, but the spindle would just coast to a stop. I then disconnected the VFD Run Prohibit and it did what I needed. As a bonus, since the estop button is latching, stop command is continuously being applied, thus preventing the spindle from being restarted until the estop is deactivated. The only thing I haven't figured out is how to read the inverter fault when OC1 is configured to output it. There does not seem like enough voltage across the terminals to be able to activate a LED nor to energize a relay. How do I read the inverter's faults?
From:
Colleen
|
Date:
05/04/2023
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The fault output of VFD is generally output through the TA/TB/TC terminal of the relay, and the corresponding parameter is P4.12=15 (VFD fault). TA-TB is a normally open contact, and TA-TC is a normally closed contact, similar to a switch.
I have a VFD, and I need to configure it to respond appropriately to an E-Stop activation. From reading the manual, I believe I need to set two input terminals, one to option 11 (External Stop Command) and another to option 13 (Inverter Running Prohibited). Are these the two correct settings I need to configure or do I not need one of them or do I need to configure additional/other settings? I have successfully activated the external stop command, but do not know how to activate the "Inverter Running Prohibited" option. How do I activate this setting? Do I close the connection from this input terminal to COM (or GND) or do I need to connect it to an external positive voltage source (5V, 12V, or 24V)? To activate this setting, is it a momentary connection (like it is to activate the external stop command) or does it require a continuous connection for the duration the VFD needs to be prohibited from running. To exit this state (to be able to run the VFD again), does the VFD need to be reset, power cycled, or will simply opening the connection be sufficient?
From:
Paulo
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Date:
04/04/2023
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For the start and stop signals of VFD, please refer to the following instructions:
1.VFD wiring:
Start switch: the start switch (Normally open contact NO)is connected to terminal FWD and terminal COM
Stop switch: The stop switch (Normally open contact NO) connect the stop switch to terminal COM and terminal X1.
2.Set as following:
P0.03=1 (run command from terminal)
P4.08=0 (2-wire control mode 1)
P4.00=13(Define terminal X1 as stop signal)
When you press Emergency stop, X1 and COM will be connected, and VFD will stop.
And you can also refer to the video for VFD terminal control: https://www.youtube.com/watch?v=nBUm4i9wnzY&list=PLlo8RulDRnthBFbP4ydheukDSKw2hAfDn&index=12
The VFD does not drive the motor.
I received this shipment last week in good condition. During installation yesterday, I can only get one of them to output a voltage and it works fine. The other one appears to work fine, but it does not output a voltage/current and there is no error or fault even though the display shows it ramping up and down - the current is always 0.00. All settings are exactly the same on both units. I thought it might be one of the filters that was bad, but even when the filter is bypassed, the VFD does not drive the motor.
From:
Vernon
|
Date:
27/07/2022
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To solve your problem,
1. Please provide us with the nameplate of the VFD for confirmation.
2. Please provide us a video showing the problem you describe. The video should show that the VFD is already running at 60HZ, but has no output voltage.
3. You can set the VFD parameter to P3.01=10 (restore the factory parameters), running the VFD with no load, and when the frequency runs to 50/60HZ, using a multimeter to measure whether the VFD output terminals U-V, V-W have output voltage.
Single phase motor with no chance to re wire it
Can i connect to a single phase motor of 7.5 HP that i can't remove the capacitors this model? Also what size of wire can the sockets support, cause i have a 4 AWG on the output for the motor.
From:
Santiago
|
Date:
25/01/2022
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1. It can be connected to a 7.5HP single-phase motor, but the rated current of your motor should be less than 49A.
2. It is generally not recommended to remove the capacitor.
3. Sorry, I don't quite understand which socket you mean by "socket", you can send your questions to this email support@ato.com, our technicians will answer your questions.
Do you offer external potentiometer for external speed controls for your 1 phase drive?
Do you offer external potentiometer for external speed controls for your 1 phase drive?
From:
Sonido
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Date:
06/01/2022
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Our VFD has a potentiometer beside its operation panel, and also you can install an external one if needed.
I have a question about VFD for you
Can this single phase VFD be applied to any type of 1 phase motor? I have a 240VAC supply fan for an indoor air handling unit and would like to control the speed to values other than the 3 speed settings that are available from the motor taps.
From:
Laurilee
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Date:
25/08/2021
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As long as your motor is 1-phase, induction motor with running or/and starting capacitors, 220/230/240V, then you can use our 1-phase drives. You can send us your motor name plate "tag label" picture or inform us about its rated voltage, and current.
Can a single phase VFD work with a shaded pole AC motor?
From:
Kamryn
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Date:
07/05/2021
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Yes, It works for single phase motor and split phase as well.
Benefits of removing the motor capacitor
What is the advantage of removing motor capacitors when installing your 1 phase variable frequency drive?
From:
Sharon
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Date:
29/03/2021
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It is okay to remove the capcitors or not, the drive will work effectively. Just removing capacitor may provide little bit stability.
Single phase output VFD operation
I am interested in single phase output VFD. Can I run multiple fan motors on one drive?
From:
Mcclellan
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Date:
25/03/2021
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Yes, you can. But run all at the same instant from the drive.
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