Shop manual máy đào HuynDai R250: An toan, cấu trúc, sơ đồ điện, thủy lực,
5-3GROUP 2 MODE SELECTION SYSTEMAccel dial AccelactuatorMain control valveEngine speedsensorMain pumpPilot pumpEPPR valveDrive signalP MEngineFuel injectionpumpCPU controllerWork mode switch signalMotor drive signalPotentiometer signalEngine speed sensor signalMax flowCO valveAccel dial signalPower mode switch signalUser mode switch signalProlixResistorNormalEmergency(optional)CN-47Mode selection system(Micro computer based electro-hydraulic pump and engine mutual controlsystem) optimizes the engine and pump performance.The combination of 2 power modes(H, S) and accel dial position(10 set) makes it possible to use theengine and pump power more effectively corresponding to the work conditions from a heavy andgreat power requesting work to a light and precise work.Mode ApplicationPower shift by EPPR valveEngine rpmDefaultDefault Other case Other caseUnload Load Unload LoadCurrent(mA)Current(mA)Pressure(kgf/cm2)Pressure(kgf/cm2)230±30280±30600±30700±30700±30245260600±30700±30700±302250±502150±501200±1001050±1001050±10020001900---215020501200±1001050±1001050±10019001800---473135355631353510085---HSAUTO DECELOne touch decelKEY STARTHigh powerStandard powerEngine decelerationEngine quick decelerationKey switch start positionPowerset(%)1. POWER MODE SELECTION SYSTEM25075MS02 5-4ProlixResistorNormalEmergency(optional)CN-47HEAVY DUTY WORK MODEThe boom priority solenoid is activated to make the boom operation speed faster.GENERAL WORK MODEWhen key switch is turned ON, this mode is selected and swing operation speed is faster thanheavy duty work mode.BREAKER OPERATION MODEIt sets the pump flow to the optimal operation of breaker by activating the max flow cut-off solenoid.Work mode Boom priority solenoid Max flow cut-off solenoidHeavy dutyGeneralBreakerONOFFOFFOFFOFFON1)2)3)2. WORK MODE SELECTION SYSTEM3 work modes can be selected for the optional work speed of the machine operation.25075MS03 5-53. USER MODE SELECTION SYSTEMThrough 2 memory sets of MI and MII, an operator can change the engine and pump power andmemorize it for his preference.Mode OperationMI (Memory mode 1)MII (Memory mode 2)High idle rpm, auto decel rpmEPPR pressure can be modulated and memorized separatelyHOW TO MODULATE THE MEMORY SETEach memory mode has a initial set which aremid-range of max engine speed, auto decel rpm,and EPPR valve input current. When you selectMI or MII, cluster LCD displays.To change the engine high idle speed, press theUSER mode switch and SELECT switch at thesame time and then ACCEL blinks at 0.5 secondsinterval.- By pressing or switch, will increase ordecrease.To change DECEL rpm, press the USER modeswitch and SELECT switch once more and thenDECEL blinks at 0.5 seconds interval.- By pressing or switch, will increase ordecrease.To change EPPR current, press the USER modeswitch and SELECT switch one more and thenEPPR blinks at 0.5 seconds interval.- By pressing or switch, will increase ordecrease.・・LCD segment vs parameter setting1)2)3)4)To memorize the final setting, press the USERmode switch and SELECT switch one more time.5)12345678910Segment( )High idle-900High idle-800High idle-700High idle-600High idle-500High idle-400High idle-300High idle-200High idle-100High idleACCEL(rpm)Low idleDecel rpm1050105011001150120012501300135014001500DECEL(rpm)150200250300350400450500550600EPPR(mA)21074OP03H21074OP03G . LoadCurrent(mA)Current(mA)Pressure(kgf/cm2)Pressure(kgf/cm2 )23 0±3 028 0±30600±30700±30700±3 024 526 0600±30700±30700±3 022 50±5 021 50±50 120 0±1001050±1001050±10 020 00190 0-- -2 1 5 020 50 120 0±1001050±1001050±1001900180 0-- -4 7313535563135351008 5-- -HSAUTO. time.5) 123 45678910Segment( )High idle-900High idle-800High idle-700High idle-600High idle-500High idle-400High idle-300High idle -2 0 0High idle-100High