TUBE 7W3131 - Caterpillar

Table 1
OPERATION    
Warning Level     Action Alarm     Action Indicator     Messenger Display Pop Up Message    
Level 1     OFF     OFF     ON    
Level 2     OFF     Flash ON and OFF     ON    
Level 3     Pulse ON and OFF     Flash ON and OFF     ON    Recommended actions to be taken by the machine operator in response to the different warning levels.Level 1 - This warning level will cause the involved alert indicator to illuminate. A level 1 warning will indicate that the operator should be aware of a condition of one or more of the machine systems.Level 2 - This warning level will indicate that the operation of the machine should be changed or maintenance should be performed to the machine. Possible damage to components on the machine may occur.Level 3 - This warning level will indicate that the machine needs to have an immediate, safe emergency engine shutdown. Possible injury to the operator or severe damage to components may occur.If an action alarm, alert indicator, or a warning occurs, a pop-up message will override any screen that was displayed on the Messenger display module.
Table 2
Event Codes for the Messenger    
EID    Warning
Level    Description    Messenger Action    
875     2     Low System Voltage     Shut down Safely    
876     1     High System Voltage     Active when input voltage is 29.5 V or higher AND Actual Engine Speed is greater than 750 RPM    
876     3     High System Voltage     Shut down Safely