Onan MDKBH Series, Service Manual

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TABLE 11-1. TROUBLESHOOTING GENSET FAULTS (CONT.)
@@@@ Some genset service procedures present hazards that can result in severe personal
injury or death. Only trained and experienced service personnel with knowledge of fuels, electricity,
and machinery hazards should perform genset service. See Safety Precautions.
Accidental or remote starting can cause severe personal injury or death. Before removing a panel or
access door, disconnect the negative (–) cable from the battery to prevent the engine from starting.
WARNING
UNKNOWN SHUTDOWN—CODE NO. 36
Control Logic: The genset Controller declared this fault because engine speed fell below 1000 RPM for 0.5
seconds, though not by genset or engine control action
Corrective Action:
1. Check for mechanical damage and service as necessary.
2. Reduce the number of appliances running at the same time, especially those with high motor starting
loads such as air conditioners.
3. Check fuel level and refill as necessary. (Note: The genset fuel pickups are probably higher than the
propulsion engine fuel pickups.)
4. Remove combustion air or exhaust system blockages.
5. Prime the engine fuel system for at least 30 seconds (p. 3-3).
6. Check all fuel filters and fittings for fuel and air leaks, tighten as necessary and reprime.
7. Replace the fuel filters and reprime (p. 4-5).
8. Conduct a fuel pump test and replace if necessary (p. 6-4).
9. Check for proper operation of the governor actuator and service as necessary (p. 6-7).
10. Service the brushes and slip rings as necessary (p. 8-4) and test the rotor and quadrature windings for
opens and shorts (p. 8-5). Replace a stator or rotor with faulty windings.
11. Service the fuel injectors in accordance with the engine Workshop Manual (p. 6-1).
12. Check for proper operation of the internal governor mechanism in accordance with the engine Work-
shop Manual (p. 6-1).
13. Service a worn engine in accordance with the engine Workshop Manual (p. 6-1).
14. Replace the genset controller (p. 9-1).
INVALID GENSET CONFIGURATION—CODE NO. 37
Control Logic: The genset Controller is not configured properly for the genset
Corrective Action: Refer to Pages A-1 through A-3 as appropriate.
1. Make sure the ends of the two leads marked CONFIG 1 and CONFIG2 in the wiring harness are not
connected and that they are terminated with insulated connectors.
2. Reconfigure the genset controller (p. 2-7).
3. Replace the genset controller (p. 9-1).
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