Generally there are two reasons that may cause the water-proof power to stop operation, firstly the instantaneous overload triggers the overload protection; in such case it is proposed to increase the power’s output power or modify the load design; secondly the overhigh temperature rise triggers the overtemperature protection. In both cases above, the water-proof power shall be protected; however after the condition is released and it is switched on again, the normal operation can then be recovered.