Failure code 0487- indicates that the EGR sensor is faulty, or the EGR sensor connector is loose and poor contact. Rub it and then try it. If it doesn't work, you have to replace it. The common fault code used by Sumitomo excavator and the code meanings are as follows: : Fault code applicable to Sumitomo excavator models include: Sumitomo SH460HD-5, Sumitomo SH200LC-3, Sumitomo SH80-3B, Sumitomo SH700LHD-5, Sumitomo SH240-3, Sumitomo SH75XU-3, Sumitomo SH75U, Sumitomo SH330LC-3, and other common Sumitomo excavator models. 7000--P1 pressure sensor 7001--P2 pressure sensor 7002--N1 Pressure sensor 7003N2-- Pressure sensor 7004-- overload pressure sensor 7005-- Bottom pressure sensor 7006-- pressure link sensor 7020-- Upper pressure penetrator 7021-- Rotary pressure penetrator 7022-- Walking pressure penetrator 7023-- Arm pressure penetrator 7040-- fuel level sensor 7041-- oil temperature sensor 7045-- monitor thermistor 7060-- large arm Angle sensor 7061-- Small arm Angle sensor 7062-- Deviation Angle sensor 7063-- oil filter plug pressure switch 7200-- rotary brake solenoid valve 7201-- traveling high speed solenoid valve 7202-- boost solenoid valve 7203-- BZ walking alarm 7204-- Energy saving solenoid valve 7205--REL fill oil pump stop 7206-- Standby circuit return valve 7207-- rotary brake release solenoid valve 7208 fan reverse solenoid valve 7209-- air conditioning water temperature signal output 7210-- Crane 7211-- Turning signal and bucket stop 7212-- Safety lock solenoid valve 7240-- Pump output power proportional valve 7241-- pump flow proportional valve 7242---- fan proportional valve 7243-- large arm proportional valve 7244-- small arm proportional valve 7245-- deviation proportional valve 7400.7402.7403-- Water temperature 7404-- oil temperature 7405.7406-- after pressure temperature 7420-- generator voltage 7421-- water level 7422-- oil pressure 7423-- Air filter 7424-- Return oil filter 7600-- CAN 7601-- Monitor communication 7602-- ECM communication 7603-- Controller B communication 7604-- Controller S communication 7605-- ECM 7606-- EEPROM 0087-- No pumping pressure 0088-- Abnormal common rail pressure 0089 -- High pumping pressure 0090-- SCV drive system 0107 Atmospheric pressure sensor (voltage bottom) 0108 Atmospheric pressure sensor (high voltage) 0112 Supercharging front intake air temperature abnormal (voltage bottom)0113-- supercharging front intake air temperature abnormal (high voltage) 0117.0118 Water temperature too low or too high 0182.0183-- Fuel temperature 0192-- common rail pressure (low voltage) 0193-- common rail pressure (high voltage) 0201-- 0206 Nozzle drive circuit break (corresponding to each cylinder) 0219-- limit operation 0237.0238-- Pressure sensor after pressurizing low or high voltage 0335.0336-- crankshaft position sensor 0340.0341-- CAM position sensor 0380-- Preheating sensor 0487-- EGR sensor
In this case, you should first check whether the pressure interface is leaky or blocked, if it is confirmed that it is not, check whether the wiring method is wrong and check the power supply, if the power supply is normal, it is necessary to perform simple pressure to see whether the output has changed, or see whether the sensor zero has output, if there is no change, the sensor has been damaged. On the contrary, it is the problem of instrument damage or other links of the whole system.
Second, the pressure sensor sealing ring problem
When the first pressure is applied, the transmitter output does not change, and when the transmitter output is pressurized again, the transmitter zero position does not return after pressure relief, which is likely to be the problem of the pressure sensor seal ring. The common situation is that due to the sealing ring specification, after the sensor is tightened, the sealing ring is compressed into the sensor suction port, thus blocking the sensor. When pressurized, the pressure medium can not go in, but when the pressure is large, the sealing ring is suddenly opened, and the pressure sensor is changed by pressure. The best way to eliminate this fault is to remove the sensor, directly see whether the zero position is normal, if the zero position is normal, replace the seal ring and try again.
Third, the output signal of the transmitter is unstable
This failure can certainly be attributed to a stressor. The pressure source itself is an unstable pressure, and it is likely that the anti-interference ability of the instrument or pressure sensor is not strong, the vibration of the sensor itself is very strong, or the sensor has been damaged.
4. The deviation between the transmitter and the pointer pressure gauge is large
The occurrence of such deviation is a normal phenomenon, and the normal deviation range can be confirmed; A final type of failure that is prone to occur is the effect of the mounting position of the differential pressure transmitter on the zero output. Differential pressure transmitter Because of its small measuring range, the sensor element in the transmitter will affect the output of the differential pressure transmitter. When installing, the pressure sensitive part of the transmitter should be axial 90 degrees perpendicular to the direction of gravity, and remember to adjust the zero position of the transmitter to the standard value after installation.