No, your unit is fine. Here are some things you can check: first, make sure your helicopter is as level as possible BEFORE you power it on. Ensure that you do not move it until the initialization servo pumps. If you still get the error, you may have a stuck sensor. MEMS sensors are microscopic mechanical devices so a hard landing, crash, or other shock can affect them. Often, powering off the unit and giving it a firm slap is enough to unjam the sensor.