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Inverter test run steps
After turning on the power, confirm that the operator panel displays F60.0Hz. In standby mode, the STOP and FWD indicators will light up.
Press the key to change the frequency to 5HZ. On the panel, when the RUN key is pressed, both the RUN and FWD indicators will light up, indicating that the operation command is forward rotation. To decelerate and stop, just press the STOP key.
Check whether the motor rotation direction is correct and meets the user's needs; whether the motor rotation is stable (no abnormal noise and vibration); whether the acceleration/deceleration is smooth. If there is no abnormality, increase the operating frequency and continue the test run. After the above test run, there is no abnormality, and then it can be officially put into operation.
A Few Simple Steps for Inverter Commissioning

Four basic steps need to be paid attention to when debugging the frequency converter:

1. No-load power-on inspection of the inverter
1. Ground the ground terminal of the inverter.
2. Connect the power input terminal of the inverter to the power supply through the leakage protection switch.
3. Check whether the ex-factory display of the display window of the inverter is normal. If it is not correct, you should try the reset operation. If it is still not correct, you should ask for a replacement.
4. Familiar with the operation keys of the inverter.

General frequency converters have 6 keys such as run (RUN), stop (STOP), programming (PROG), data/confirmation (DATA/ENTER), increase (UP, ▲), decrease (DOWN, ▼), and different frequency converters The definitions of the operation keys of the controller are basically the same. In addition, some inverters also have function keys such as monitor (MONTTOR/DISPLAY), reset (RESET), jog (JOG), and shift (SHIFT).

Inverter running with motor without load
1. To set the power and number of poles of the motor, the operating current of the inverter must be considered comprehensively.
2. Set the maximum output frequency, base frequency and torque characteristics of the inverter. The selection of V/f type includes items such as maximum frequency, basic frequency and torque type. The highest frequency is the highest frequency that the inverter-motor system can run. Since the highest frequency of the inverter itself may be higher, when the maximum frequency allowed by the motor is lower than the highest frequency of the inverter, it should be set according to the requirements of the motor and its load. Certainly. The basic frequency is the dividing line between the constant power control and constant torque control of the motor by the frequency converter, and should be set according to the rated voltage of the motor. The torque type refers to whether the load is a constant torque load or a variable torque load. The user selects one of the types according to the V/f type diagram and load characteristics in the instruction manual of the inverter. There are multiple V/f curves for the user to choose from for general-purpose inverters, and the user should choose the appropriate V/f curve according to the nature of the load when using it.
If it is a fan and pump load, set the torque running code of the frequency converter to the running characteristics of variable torque and reduced torque. In order to improve the low-speed performance of the inverter when it starts, so that the torque output by the motor can meet the requirements of starting the production load, the starting torque should be adjusted. In the frequency conversion speed regulation system of the asynchronous motor, the control of the torque is more complicated. In the low frequency band, since the influence of resistance and leakage reactance cannot be ignored, if V/f is still kept constant, the magnetic flux will decrease, thereby reducing the output torque of the motor. For this reason, the voltage should be properly compensated in the low frequency band to increase the torque. Generally, the inverter is manually set and compensated by the user.
3. Set the frequency converter to its own keyboard operation mode, press the run key and stop key, and observe whether the motor can start and stop normally.
4. Familiarize yourself with the protection code when the inverter fails, observe the factory value of the thermal protection relay, observe the set value of the overload protection, and modify it if necessary. The user of the frequency converter can set the electronic thermal relay function of the frequency converter according to the instruction manual of the frequency converter. The threshold value of the electronic thermal relay is defined as the ratio of the rated current of the motor and the frequency converter, usually expressed as a percentage. When the output current of the inverter exceeds its allowable current, the overcurrent protection of the inverter will cut off the output of the inverter. Therefore, the maximum value of the threshold of the electronic thermal relay of the inverter shall not exceed the maximum allowable output current of the inverter.