**Alarm Code:**

3. Emergency stop pressed or no pulse

**Context where the error occurs:**

This alarm can appear when an engine is running and no pulses are detected from the computer. The reason can be a broken pulse indicator. It also appears when the emergency stop is pressed down.

**Solution:**

   * Make sure the emergency stop is not applied. Test by pushing it down, release it by pulling it up
  * If the emergency stop is not applied, you must troubleshoot the motors.