What does LDcHl mean? Displayed on the frequency converter.

If you find that the frequency converter can't adjust the speed, you must first confirm which speed regulation mode the frequency converter adopts. The inspection method is to consult the setting of internal parameters. In general, the panel is used for temporary debugging. The latter four are often used in the normal operation of frequency converters.

After knowing which frequency setting mode the inverter uses, you can change the frequency setting mode to panel setting, so that you can know whether the inverter can run normally. If the inverter switch is normal, you can almost judge that there is something wrong with the external input. It is unlikely that the multi-speed terminal will break down.

If the potentiometer is used, replace it directly, and the small frequency converter may need to be replaced with the panel.