Appendix C Faq - V&T E5-H Series User Manual

E5−H High Performance Universal Inverter User Manual

Appendix C FAQ

I. In the case of V/F control, why did the inverter have abnormal operation?
A: (1) Check if parameter auto−tuning has been performed under V/F control, For details, refer to the setting
process for parameter auto−tuning in Appendix B.
A: (2) Check if the control lines for the E5−H−4T18.5G, and for inverter above 18.5kw, please check if the
current sensor line is loosen or dislocated.
II. Why was the operating frequency of the inverter kept at 0Hz upon reverse running?
A: (1) Check if the frequency is set to 0;
A: (2) Check if the inverter function code parameter P3.09 is set to 0. If not, change it to 0.
III. The inverter had been connected with braking resistor featuring dynamic braking, why didn't it
work?
A: (1) Check if the braking resistor is connected between the main circuit terminals B1 and B2;
A: (2) Check if the inverter function code parameter PA.09 is set to 1. If not, change it to 1.
IV. Why was there large deviation on the correspondence relation between the analog input and the
set frequency?
A: (1) Check if the jumpers of analog input type and control board are properly set. For the analog voltage
input, toggle the corresponding channel to the "V" end of the jumper; for the analog current input, toggle the
corresponding channel to the "I" end of the jumper.
A: (2) Calibrate the analog input curve according to function codes P6.00 to P6.2. For details, refer to the
description of P6 group in Chapter 6 Parameter Description.
V. Why was there large deviation on the correspondence relation between the analog output and the
output frequency, output current, etc.?
A: (1) Check if the jumpers of analog output type and control board are properly set. For the analog voltage
output, toggle the corresponding channel to the "V" end of the jumper; for the analog current output, toggle
the corresponding channel to the "I" end of the jumper.
A: (2) Calibrate the analog output curve according to function codes P7.05 to P7.09. For details, refer to the
description of P7 group in Chapter 6 Parameter Description.
VI. Why did the inverter report E.AIF analog input abnormal error?
A: (1) Check if the jumpers of analog input type and control board are properly set. For the analog voltage
input, toggle the corresponding channel to the "V" end of the jumper; for the analog current input, toggle the
corresponding channel to the "I" end of the jumper.
A: (2) Check if the analog input exceeds 11V;
A: (3) When using the +10V power supply of the inverter control board, check if the voltage of +10V is lower
than 9V or higher than 11V. If yes, check if the resistance value between the +10V and the GND is less than
Appendix C FAQ 129