To Next PageTo Next PageWhy does my YASKAWA DC Drives inverter trip at overvoltage?
If your YASKAWA DC Drives inverter trips at overvoltage (OV), this could be due to insufficient braking resistor unit capacity. In this case, examine the braking conditions again. It could also be caused by improper wiring, so check and repair the wiring. Another cause could be a fault in the braking unit, so replace the unit.
What to do if YASKAWA DC Drives braking unit trips by heat sink overheat?
If the braking resistor unit overload relay (or thermal protector) of your YASKAWA DC Drives trips due to heat sink overheat, this could be due to several reasons. It may be caused by an excessive start/stop switching frequency, so examine the operating conditions. The issue could also stem from excessive load inertia. Improper combination of braking unit and braking resistor unit can cause this problem, so reset it. High ambient temperature could be the reason, so reduce it. Finally, the braking unit itself might be faulty, so replace the unit.
Why does YASKAWA CDBR braking resistor unit overload relay trip when not decelerating?
If the braking resistor unit overload relay (or thermal over-load protector) of your YASKAWA DC Drives trips when not decelerating, and you don't have a braking unit, the inverter's built-in main circuit discharging transistor may be short-circuited; replace the inverter. If you do have a braking unit, the braking unit's main circuit discharging transistor may be short-circuited; replace the unit. Another cause could be an improper braking unit power supply voltage selection connector setting. If the power supply voltage is greater than the power supply voltage selection position, set it again.
General