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According to customer needs, models with 500V and 660V voltage levels can be provided.

Usually a HMI with special air compressor program is needed. The HMI operation is intuitive and simple, and the air compressor can be debugged without instructions. In addition, in order to meet the operating habits of different customers, an LCD keyboard can also be selected to realize all parameter settings and debugging of the integrated machine.

Hibernation is a function for saving energy, when the pressure/flow requirement is very little for a long time, VFD enter to hibernation status. There are 2 kinds of hibernation, according to the running frequency or deviation, the hibernation internal logic is as attachment.

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Possible causes of failure:
1. The short-circuit connection jumper between terminal 24 V and PW is lost;
2. The voltage of terminal 24 V is abnormal;
3. The terminal is damaged;
4. The terminal polarity is set incorrectly;
5. Some parameter setting is improper, please reset to factory parameters, then test.

Inspection running can be used to check whether the lift is running properly.

During inspection running, check whether the actual lift running direction is the same as the direction in the command. If not, exchange any two cables of U, V, and W or set P00.06=1.

Note: For the synchronous motor, changing the motor cables requires autotuning the motor parameter (pole angle) again. It is recommended to set P00.06 to change the lift running direction.

GD350 needs to be equipped with a Bluetooth card, scan the QR code on the inverter, download and install INVT Workshop, and open the mobile phone Bluetooth to connect to the inverter. See the video link below for more steps.

https://www.youtube.com/watch?v=zkC-eGiBJ8I

GD300-01A is a dedicated inverter mainly developed for screw air compressors. For other types of air compressors, it is recommended that you consult our technicians to determine the specific control plan.

There are 3 parameters P22.24~P22.26 are used for setting the conditions of reduce motor:
1. P22.24 pressure allowance 100% is corresponding with P09.02.
2. If variable frequency motor runs frequency reach P22.20, and (PID feedback [P17.24] - PID given[17.23]) > Pressure allowance [P22.24]), this status keep time reach P22.26, meet condition of reduce motor.
3. P22.25 a limit frequency to reduce motor. When the system still have power freq. motor, and VFD output reach this P22.25, keep time reach P22.26, start to reduce the power freq. motor.
4. Also when added a power freq. motor, VFD also output this setting frequency P22.25, then adjust by PID, avoid pipe pressure fluctuation.
5. When reduce motor, VFD operate the relay to switch-off power freq. motor, at the same time, increase output frequency to P22.20 with P22.28 ACC time(if P22.27=1), then adjust output frequency by PID. In order to avoid pipe pressure fluctuation.

GD300-01A is single-VFD, only one variable frequency output, use to control the main motor of air compressor;
GD300-01A-RT is single-VFD integrated machine, one variable frequency output for main motor, and integrated one power frequency for cooling fan;
GD300-21 is dual-VFD integrated machine, two variable frequency outputs for main motor and cooling fan.