ROD AS 3797041 - Caterpillar

Table 1
Event Code    
Description    Conditions which Activate the Code    System Response    
E229 (1) Fuel Energy Content Set Too Low     The fuel correction factor is less than the trip point for 20 seconds.     The alarm output is activated. The code is logged.    
E230 (1) Fuel Energy Content Set Too High     The fuel correction factor is greater than the trip point for 20 seconds.    
E231 (3) Fuel Quality Out of Range     The actual BTU of the fuel has exceeded the acceptable range.     The shutdown output is activated. The code is logged. The engine is shut down.    Note: Within the configuration screen for the ECM, there are four parameters that relate to the fuel quality:
"Fuel Quality Input Type Configuration"
"Fuel Quality Sensor LHV Lower Limit"
"Fuel Quality Sensor LHV Upper Limit"
"Fuel Quality"Be sure that the configuration parameter for "Fuel Quality Input Type Configuration" is set for the proper system.When the "Fuel Quality Input Type Configuration" parameter is set to "Configuration" a fixed value must be set for the "Fuel Quality" parameter. Engines that run on a consistent fuel supply typically use this type of system.When the "Fuel Quality Input Type Configuration" parameter is set to "4-20mA" a variable value is used by the software. The "4-20mA" signal is provided by the customer via a sensor that measures fuel quality. For this system, set the "Fuel Quality Sensor LHV Lower Limit" to the value that corresponds to the "4mA" signal and set the "Fuel Quality Sensor LHV Upper Limit" to the value that corresponds to the "20mA" signal. Engines that run on a inconsistent fuel supply typically use this type of system. Engines that run on gas from a coal seam or landfill are examples of an inconsistent fuel supply.Probable Causes
The Low Heat Value (LHV) of the gas or the specific gravity of the gas is significantly different from the value that is programmed into the electronic control module.
Condensation is forming in the gas.Recommended Repairs
Obtain a Fuel Analysis and Program the "Fuel Quality" Parameter
Obtain an analysis of the gas in order to determine the LHV. Program the "Fuel Quality" parameter to the actual value of the LHV.If the quality of the gas is not consistent, obtain several analyses over a period of time. Program the "Fuel Quality" parameter to the average value of the LHV.Check the Dryer for the Gas
Check the dryer for the gas for proper operation. Repair the dryer, if necessary.