Product Manual

4-3
TABLE 4-1. TROUBLESHOOTING
Some genset service procedures present hazards that can result in severe per-
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
WARNING
ENGINE OVER TEMPERATURE—CODE NO. 1
(During normal operation engine coolant temperature exceeded 239° F [115° C] for 10 seconds)
Corrective Action:
1. Check engine coolant level, add coolant as necessary and repair any leaks.
2. Check for and remove any objects blocking the air inlet or outlet openings in the bottom of the genset
and clean out dirt fouling the radiator passages.
3. Run fewer appliances at the same time to keep down engine temperature. (Note that high altitude
and high ambient temperature decrease engine cooling capacity.)
LOW OIL PRESSURE—CODE NO. 2
(During normal operation engine oil pressure dropped to less than
14 psi [97 kPa] for 3 seconds—switch closed)
Corrective Action:
1. Check engine oil level, add oil as necessary and repair any leaks.
2. Drain the excess oil if the level is above Full on the dipstick. If the level is too high the crankshaft can
whip the oil into foam, which the pump can’t pump.)
SERVICE CHECK—CODE NO. 3
(A second-level fault occurred)
Corrective Action: Check the second-level fault code by momentarily pressing Stop. The second-lev-
el fault will be one of the following in this table.
OVER CRANK—CODE NO. 4
(First-level fault code—Cranking time exceeded 35 seconds)
Corrective Action:
1. Check fuel level and refill as necessary. (Note: The genset fuel pickup is probably higher than the
vehicle engine fuel pickup.)
2. Prime the engine fuel system for one minute (p. 2-4).
3. Check the engine air filter and remove any blockage (p. 3-4).
4. Change the engine oil to oil of the proper viscosity for the ambient temperature. High oil viscosity
can slow down cranking speed.
5. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime.
6. Replace the fuel filter (p. 3-6).
OVER VOLTAGE—CODE NO. 12
(After voltage regulation was enabled Output Voltage jumped to more than 125% of rated for 75 millisec-
onds or to more than 115% of rated for 3 seconds)
Corrective Action: See an authorized Onan dealer.