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FAQs Library
Q
Does GD300-01A support closed-loop control of motor encoder?
2022-08-16
A

75kW (inclusive) and above support closed-loop vector control, and can receive motor encoder signals. Usually air compressor adopts speed open loop control, no encoder closed loop is needed.

Q
For GD300-21,"Pressure signal failure" or "temperature signal failure" is displayed
2022-08-16
A

on the HMI and it cannot be started.

How to solve it?
Please check whether the signal of the pressure transmitter is wired incorrectly or damaged, and whether the temperature sensor PT100 is wired incorrectly or damaged. After the fault is removed, GD300-21 will automatically reset, display the standby state, and then ready to run.

Q
What should I do if the HMI is connected to GD300-21 and the display communication fails?
2022-08-16
A

First of all, ensure that the wiring is correct. HMI and GD300-21 are connected through RS485 interface, please refer to the wiring diagram for correct wiring;
Secondly, check whether the Modbus communication parameters (P14.00~P14.02) of GD300-21 have been modified, usually use the default value.
Finally, you can also enter the HMI setting interface to confirm whether the COM port settings are correct.

Q
For GD300-21, how to use the IOT function of the air compressor?
2022-08-16
A

You need to select the INVT IoT module. When placing an order, you need to inform the APN address of the mobile phone SIM card operator you are using, and INVT will set it up for you.
IoT connects to HMI.
INVT technical support will open an IoT account for you. You can download visit computer webpage https://iot.invt.com or mobile APP market to download INVT Compressor, log in to your account and bind the IoT module, then you could remotely monitor and set up the air compressor through the network.

Q
For GD300-21, can the HMI interface be changed according to customer requirements?
2022-08-16
A

For example, use customer pictures, logos, etc.
According to specific project requirements, we can meet customer customization requirements.

Q
The pressure unit of the air compressor is bar, but the pressure unit of GD300-21 is Mpa. How to set the parameters?
2022-08-16
A

The conversion of pressure units is:
1Mpa=10bar
For example, if you want to set a pressure of 8bar, then in GD300-21, it can be set to 0.8Mpa.

Q
For GD300-21, what parameters need to be set when the air compressor is powered on for the first time?
2022-08-16
A

After logging in on the touch screen,
1. "Menu"-"Main Inverter Parameters"-"Fan Inverter Parameters" to set the parameters of the main motor and fan;
2. "System Configuration"-"Motor Parameter Setting"-"System Parameter Setting"-"Debug Mode" to complete the system configuration;
3. Set "User Parameters" and "Protection Parameters".
After ensuring that the air compressor is installed and connected correctly, you can start a trial run.

Q
What type of temperature sensor does GD300-21 support? How many temperature inputs are there?
2022-08-16
A

GD300-21 supports PT100 temperature sensor with two inputs.

Q
What is the input power factor of GD300-21?
2022-08-16
A

All GD300-21 series are equipped with built-in DC reactor as standard, and the power factor can reach above 0.9.

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