Fault Indicator
The fault indicator is lit any time the controller is operating in a non-standard mode. During normal operation the fault indicator is off.
| 
                                                         State  | 
                                                    
                                                         Description  | 
                                                
|---|---|
| 
                                                         Off  | 
                                                    
                                                         Controller is operating normally  | 
                                                
| 
                                                         On (red)  | 
                                                    
                                                         Controller is operating in a non-standard mode  |