What causes dc motor controller light did not turn

More extensive, dc motor controller in use may encounter the light did not turn, once appear this kind of situation will affect its use effect, so we need to take corresponding solutions to deal with. Below small make up to introduce the cause of the light did not turn. 1. Due to the armature circuit disconnection. 2. Due to the armature coil motor controller there caused by short circuit. 3. Due to the commutator caused by vertical plate or and head a desoldering. 4. Due to motor controller excitation circuit appear offline. 5. Due to poor contact of the brush. About dc motor controller is not empty turn reason is introduced here, we want more, remember to pay attention to our website dynamic oh.