LOPX 309 HFO

Monitor and document differential pressure of automatic back-flushing filter; Check switchover to manual bypass filter; Control wear condition of disk elements; Replace filter if visual wear or insufficient cleaning; Inspection interval every 2,000 operating hours or at differential pressure alarm

Check EVT20 viscosity sensor for functionality; Compare EPC50V/EPC70 controller display setpoint/actual value; Test heater thermostat function (for oil FCMs); Viscochief 3 calibration and sensor cleanliness check; Viscosity range ±5% from setpoint (engine-dependent, typical 10-40 cSt @ 50°C); Document fuel changeover ramp tracking

Check pressure in high-pressure stage: 6-16 bar (engine-dependent); Inspect low-pressure pumps (reserve/service pump) for vibration, noise and leakage; Test pump switchover logic (redundancy check); Check flow sensor at outlet (flow transmitter signal stability); Monitor pump current consumption (VFD versions)

Check thermostat setpoint (typical 55-95°C for HFO, engine-dependent) on EPC display; Compare heater outlet temperature with infrared pyrometer or built-in sensor; Check heating element current consumption; Inspect heater block for lime deposits and wear; Test bypass valve for function; Inspection interval: annually or if temperature deviation >5°C

Compare FlowSync pump speed with engine load signal; Compare separator feed flow with setpoint (variable flow, not constant); Check feed return pressure valve for wear; Verify tank level sensor (safety limit value); Monitor VFD pump speed output signal; Inspection interval: every 500 operating hours or after fuel type change

EPC50V/EPC70 controller boot sequence test; alarm LEDs and display fault codes document; alarm acknowledge button test for function; safety circuits (emergency shutdown, cooling/heating enable, leak test, purge) check; cable connections and connectors inspect for corrosion; emergency switchover to manual operation training; inspection interval: every 6 months or per service recommendation