COUNTERWEIGHT AS 3744980 - Caterpillar

When a shutdown fault code is reset, the digital voltage regulator will begin operation again. If the generator is being driven, it will begin to regulate according to engine /generator speed and the regulation mode selected.
Parameter Exceptions For Earlier Digital Voltage Regulators
The chart lists the serial number break between the earlier and the current fault parameters. All digital voltage regulator part numbers starting with 116 (116-xxxx) and some of the regulator part numbers starting with 130 (130-xxxx) use the earlier fault parameters. The current fault parameters will be implemented on all versions of the digital voltage regulator built after March 1996. Another method to determine if a digital voltage regulator uses the current fault parameters is to check the PROM ID (parameter :91). A value of 1.03 or greater indicates use of the current alarm/fault parameters.Note: Alarm and fault troubleshooting is discussed in Testing And Adjusting, "Fault Handling For Earlier Digital Voltage Regulators".
Table 3
Earlier Fault Parameter
Serial Number Break    
Digital Voltage Regulator
Part Number    Earlier Fault Parameter
Serial Number    
130-3471     LBNBA1-0123    
130-3472     LBNBB1-0301    
130-3473     LBNBC1-0176    
130-3474     LBNBD1-0190    
130-3475     LBNBE1-0392    
130-3476     LBNBF1-0238    Parameter :92 - Latest Fault. This parameter contains the fault code of the shutdown fault that first occurred since this parameter was reset. If any additional shutdown faults occur, they are not recorded until the existing fault is reset. The fault code is retained during power-down and power-up of the digital voltage regulator. When a shutdown fault occurs, the corresponding fault code is automatically flashed on the display. Any information shown on the display flashes until the shutdown fault reset parameter :96 is activated. When no fault is present and parameter :92 is cleared, the value of parameter :92 is zero.Parameter :93 - Previous Fault. This parameter contains the fault code for the last shutdown fault that was reset and cleared. When an active shutdown fault (parameter :92) is reset and cleared, the fault code is moved to this location (parameter :93). The fault code is retained during power-down and power-up of the digital voltage regulator. An active shutdown fault is reset using the fault reset switch or the parameter :96. It is cleared and moved into parameter :93 using the fault clear parameter :94. Parameter :94 - Fault Clear. This parameter acts like a switch to clear fault codes from the latest fault parameter :92 and the alarm fault parameter :95. Each time the fault clear function is used, the alarm fault parameter :95 is cleared to zero and the value in the latest fault parameter :92 is moved to the previous fault parameter :93. If there is a fault code in the previous fault parameter :93, it will be lost since the value from the latest fault will now occupy that location. Clearing a fault code also stops the display from flashing. Clearing DOES NOT RESET shutdown faults. Before clearing an alarm/fault, check parameters :92 and :95 to see if an active fault