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DCA85USJ2 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #1 (03/22/11) — PAGE 65
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.
Low coolant level light is on.
(Optionally installed)
Low coolant level? Fill coolant level.
Sending unit failure? Replace sending unit.
Low battery voltage? Replace/charge battery.
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.
Loss of MPU light(s) or on.
Magnetic pick up out of adjustment? Adjust magnetic pick up.
Magnetic pick up dirty? Clean magnetic pick up.