RV generator fault codes

RV generators shut down and store a fault code for conditions like low oil, overspeed, high temperature or failure to start.

Onan

Fault 2 (Low Oil)
Low oil pressure fault (a first-level fault shown as two blinks, code 2). The lo… Fault 3
First-level 'service check' fault. Three blinks tell you the controller has logg… Fault 12
Overvoltage fault. The controller could not keep the output voltage at the rated… Fault 13
Undervoltage fault. The controller could not hold the generator's AC output at r… Fault 14
Overfrequency fault. The engine governor could not hold the rated output frequen… Fault 15
Underfrequency fault. The engine governor could not keep the engine spinning fas… Fault 19
Governor actuator fault. The controller detected an open or shorted circuit in t… Fault 27
Voltage sense fault. The controller was unable to sense the generator's output v… Fault 29
High battery voltage fault. The voltage across the genset's starting battery sys… Fault 31
Overspeed fault. The engine speed exceeded 3400 rpm, so the controller shut the … Fault 32
Low cranking speed fault. During start the engine cranked slower than about 180 … Fault 36
Engine Stopped fault. The engine stopped on its own without the controller comma… Fault 38
Overcurrent (field overload) fault. The generator saw excessive current from low…