Specifications

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TABLE 4. TROUBLESHOOTING (CONT.)
Some genset service procedures present hazards that can result in severe per-
sonal injury or death. Only qualified service personnel with knowledge of fuels, electricity, and
machinery hazards should perform genset service. See Safety Precautions.
WARNING
LOW OIL PRESSURE CUTOFF SWITCH FAULT—CODE NO. 23
(Controller sensed switch still open during start—not a running fault)
Corrective Action: See an authorized Onan dealer.
COOLANT TEMPERATURE SENDER FAULT—CODE NO. 24
(Controller did not sense temperature change during first 5 minutes of operation)
Corrective Action: See an authorized Onan dealer.
ENGINE ABOVE SPEED TARGET FAULT—CODE NO. 25
(Governor unable to regulate to target speed)
Corrective Action: See an authorized Onan dealer.
ENGINE BELOW SPEED TARGET FAULT—CODE NO. 26
(Governor unable to regulate to target speed)
Corrective Action:
1. Reduce the number of connected appliances, especially when air conditioners and battery chargers
are running.
2. Prime the engine fuel system by holding the control switch down in its Stop position for at least 1 min-
ute.
PMA SENSE LOST FAULT—CODE NO. 27
(Controller unable to sense PMA frequency)
Corrective Action: See an authorized Onan dealer.
DC SENSE LOST FAULT—CODE NO. 28
(Controller unable to sense DC bus voltage)
Corrective Action: Open the circuit breaker. If the fault does not persist, check for and disconnect ex-
cessive loads from the genset before starting.