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DCA125SSIU 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #3 (01/13/11) — PAGE 51
TROUBLESHOOTING (ENGINE CONTROLLER)
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown,
use Table 20 (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 offi ce or service plant.
Table 20. Engine Controller Troubleshooting (MPEC)
Symptom Possible Problem Solution
Low oil pressure light is on.
Low oil level? Fill oil level.
Oil pressure sending unit failure? Replace oil pressure sending unit.
Time delay malfunction in controller? Refer to dealer.
Wire shorted? Inspect/repair wire.
High coolant temperature
light is on.
Fan belt tension incorrect? Tighten/replace fan belt.
Air fl ow is not circulating through radiator? Clean/repair radiator grill.
Doors open? Close doors.
Exhaust leaking? Replace/repair gaskets or faulty part.
Generator being overloaded? Check/reduce load.
Thermostat failure? Replace thermostat.
Air intake blocked? Clean all air intakes.
Temperature switch failure Replace temperature switch.
Overcrank light is on.
No or low fuel? Fill fuel level.
Controller needs to be calibrated? Refer to dealer.
Overspeed light is on.
RPM engine speed too high? Adjust RPM.
Governor actuator needs to be adjusted? Adjust governor actuator.
Governor controller needs to be adjusted? Adjust governor controller.
Engine controller needs to be calibrated? Refer to dealer.
Overspeed and engine start
lights are on at same time.
Magnetic pickup out of adjustment? Adjust magnetic pickup.
Magnetic pickup dirty? Clean magnetic pickup.
Is magnetic pickup cable connected?
Inspect magnetic pickup cable and
connect cable securely.