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Volvo EC330B Excavator Engine Start and Stop Circuit Old Overview

Volvo EC330B Excavator Engine Start and Stop Circuit Old Overview 

Volvo PTT


Procedures:
Engine Start and Stop Circuit(Old)
Power from battery => electric greasing system,start key,start motor,battery relay
Power from battery relay =>safety start relayVocom 88890300
1) Key ON
 BR=> Battery relay,alternator(15,pre-magnetization)
 ACC=>VECU,Air conditioner,EMS power relay
2) Key Start
 R2=> VECU
 C=> safety start relay
3) Engine running
 Alternator(L)=>hour meter,safety start relay,VECU(charge lamp off)
 * Resistor between alternator and BR termainal for quick charge lamp off
 Alternator(B+)=>alternator(BS,voltage sensing for regulation)
 Alternator(15)=>battery relay
4) Key Off
 VECU(JA61)=>battery relay

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