QThe converter suddenly had the wrong code and I couldn't work again.What should I do now?2018/3/28 9:28:04A
Hello, the machine has broken down, please contact our company service hotline 400 0411 755, the service engineer will instruct you how to judge the machine failure or solve the fault.
QAfter the PI7800 conversion machine is used, the parameters cannot be modified.For what reason?2018/3/28 9:26:29A
Please check whether the password is set by Y18. After setting the password, the parameter is locked and the keyboard displays CODE.Please contact the customer service number 4000411755.
QWhat is the cause of the secondary failure of the inverter?2018/3/28 9:24:16A
Please confirm what is wrong with the machine?You can call our customer service hotline 400-0411-755
QHow does the converter PI7000 7.5KW add external rheostat adjustment frequency?2018/3/28 9:24:05A
The external potentiometer needs to set the parameter F04 to 1. Please connect the wiring diagram of the wiring diagram according to the instructions, that is, connect V1, V2 and V3 respectively.
QWhy does the motor housing have a static voltage when using the inverter?2018/3/28 9:23:39A
Because the inverter output voltage of PWM waveform, high frequency pulse sequence standard sine wave, the spectrum envelope containing harmonic component, its transient voltage amplitude and the frequency is very high, so that the motor winding capacitance in high voltage field between shell and effect, induced a higher voltage (there was a certain amplitude of converter shell static voltage).Therefore, there is a warning in the use of the frequency converter to ensure a reliable grounding, which is the reason.In addition, in the industrial field, usually without a separate grounding line, and zero line in alternative, a lot of ground equipment shell share the same system with frequency converter, this will make the whole system to produce high voltage static electricity, the high pressure will produce strong electric fields, interfere with the normal work of the frequency converter.If such a situation occurs, the fault can be excluded as long as a single frequency converter control system is embedded in the system.