9-8
TABLE 9-1. 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
GOVERNOR OVERLOAD—CODE NO. 22
(Maximum allowable time at full-duty cycle was exceeded)
Corrective Action:
1. Reduce the number of appliances running at the same time, especially those with high motor starting
loads such as air conditioners.
2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply
tank probably is such that the genset will run out of fuel before the propulsion engines.)
3. Remove combustion air or exhaust system blockages.
4. Check all fuel fittings for fuel and air leaks and tighten as necessary.
5. Replace fuel filters (p. 4-6).
6. Check for contaminated fuel by connecting to a source of known fuel quality.
7. Conduct a fuel pump test and replace if necessary (p. 6-4).
8. Check for proper operation of the governor actuator and replace if necessary (Page 5-9).
9. Check compression and cylinder leak down and service a worn engine. See Table 6-1 for the ap-
propriate engine workshop manual.
10. Service the fuel injectors. See Table 6-1 for the appropriate engine workshop manual.
11. Check fuel injection timing. See Table 6-1 for the appropriate engine workshop manual.
12. Check for proper operation of the internal governor mechanism. See Table 6-1 for the appropriate
engine workshop manual.
13. Replace the genset controller (p. 5-1).
FAULTY OIL PRESSURE SENDER—CODE NO. 23
(Controller sensed grounded sender)
Corrective Action: Refer to Pages A-1 through A-5, as appropriate.
1. If loose, tighten the ring terminal on oil pressure sender E1 (Page 5-6). (This fault will occur if a
loose ring terminal touches grounded metal.)
A. Repair wiring as necessary to eliminate the ground path.
B. Check electrical resistance through sender E1. Replace the sender if resistance is not between
227 and 257 ohms (0 psi) when the engine is stopped.
2. Replace the genset controller (p. 5-1).
Redistribution or publication of this document,
by any means, is strictly prohibited.
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