Troubleshooting (Engine Controller) - MQ Power DCA-400SSV Operation And Parts Manual

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown,
use Table 18 (Engine Controller Troubleshooting) as a basic guideline for troubleshooting the Microprocessor Engine
Controller unit (MPEC). If the problem cannot be remedied, consult our company's business office or service plant.
TABLE 18. ENGINE CONTROLLER TROUBLESHOOTING (MPEC)
SYMPTOM
Low oil pressure light is
on.
Low coolant level light is
on. (Optionally Installed)
High coolant temperture
light is on.
Overcrank light is on.
Overspeed light is on.
Loss of MPU light(s) or
on.
PAGE 68 — DCA-180SSJU — OPERATION AND PARTS MANUAL — REV. #3 (02/01/10)

TROUBLESHOOTING (ENGINE CONTROLLER)

POSSIBLE PROBLEM
Low oil level?
Oil pressure sending unit failure?
Time delay malfuntion in Controller?
Wire shorted?
Low coolant level?
Sending unit failure?
Low battery voltage?
Fan belt tension incorrect?
Air flow is not circulation through radiator?
Doors open?
Exhaust leaking?
Generator being overloaded?
Thermostat failure?
Air intake blocked?
Temperature switch failure?
No or low Fuel?
Controller needs to be calibrated?
RPM engine speed too high?
Governor actuator needs to be adjusted?
Governor controller needs to be adjusted?
Engine Controller needs to be calibrated?
Magnetic pick up out of adjustment?
Magnetic pick up dirty?
SOLUTION
Fill oil level.
Replace oil pressure sending unit.
Refer to dealer.
Inspect/repair wire.
Fill coolant level.
Replace sending unit.
Replace/charge battery.
Tighten/replace fan belt.
Clean/repair radiator grill.
Close doors.
Replace/repair gaskets or faulty part.
Check/reduce load.
Replace thermostat.
Clear all air intakes.
Replace temperature switch.
Fill fuel level.
Refer to dealer.
Adjust RPM.
Adjust governor actuator.
Adjust governor controller.
Refer to dealer.
Adjust magnetic pick up.
Clean magnetic pick up.