V&T Technologies Co., Ltd.
http://www.ecodrivecn.com
Appendix C FAQ
148
modification disabled;
A: (3) When the modification could not be performed upon running, check if the function code could not
modification upon running;
A: (4) When display is not available, check if the inverter function code has been encrypted;
A: (5) When display is not available, check if the inverter operation panel has been locked;
XIII. How to change the direction that the inverter drives the motor to rotate?
A: (1) In the case of operation panel control, the direction is determined by P0.07. However, the FWD/REV
key on the operation panel can real time change the direction.
A: (2) In the case of operation panel control, the direction is determined by P0.07. However, the UP/DN key
on the operation panel (or the FWD/REV knob of the shuttle operation panel) can real time change the
direction.
A: (3) In the case of operation panel control, the positive/negative frequency value resulting from the final
frequency calculation for composite control can also change the direction in real time.
A: (4) In the case of terminal control, check if the forward/reverse terminal is in one to one correspondence
with that of the control equipment (e.g. PLC).
XIV. Why did the fans of inverters of certain power classes will rotate upon power up, while others
could not?
A: The fans of the 15KW inverters and inverters of lower power class are under no control, and they will run
when powered up. The operation of the fans of 18.5KW inverters and inverters of higher power class is
controlled by the heatsink temperature. When the inverter is powered up under low temperature condition,
the fans will not run.
XV. What will happen if the CN1 busbar of the control board is loose or damaged?
A: If the CN1 busbar of the control board is loose or damaged, the inverter cannot run or will report several
errors. For instance, the inverter may display “-LU- ” or “relay/contactor could not pull on “, or report such
errors as E.oc1, E.FAL, E.oH1, E.oH2, E.Cur and E.dL3 ect
