update

components/water_cooling_temperature_control_module/pwm_ctrl_module.cpp

@@ -49,7 +49,7 @@ void PWMSpeedCtrlModule::onfbgpioirq(int32_t fanindex) {
 int32_t PWMSpeedCtrlModule::startModule(int32_t duty) {
   // ZLOGI("startModule duty:%d", duty);
   zlock_guard lck(m_mutex);
-  if (duty < 20) duty = 20;
+  if (duty < 0) duty = 0;
   fanisworking = true;
 
   clearError();