Product Manual

TABLE 5. TROUBLESHOOTING (CONT.)

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

OVERCRANK FAULT—CODE NO. 4

(First-level fault code—Cranking exceeded 30 seconds without engine starting)

Corrective Action:

1. Gasoline Models − Check and fill the fuel tank, as necessary. (Note: The genset fuel pickup tube

is probably higher up in the fuel tank than the vehicle engine pickup.)

2. Prime the engine fuel system by holding the control switch at Stop/Prime for 30 seconds.

3. Low Pressure LPG Models − Check and fill the LPG container, as necessary. On cold days the LPG

container may have to be kept at least half full to provide the rate of vaporization necessary to keep

up with the genset fuel demand.

4. High Pressure LPG Models − Check and fill the LPG container, as necessary, and drain the genset

LPG system of oil that may have migrated from the supply system (Item 5, Page 13). Make sure to

re-close the drain valve.

5. Open any closed fuel valves.

6. Secure the spark plug leads on the spark plugs (Page 20).

7. Replace the spark plugs (Page 20).

8. Service the air cleaner (Page 19).

OVERVOLTAGE FAULT—CODE NO. 12

(Controller unable to maintain rated voltage)

Corrective Action: See an authorized Onan dealer.

UNDERVOLTAGE FAULT—CODE NO. 13

(Controller unable to maintain rated voltage)

Corrective Action: Reduce the number of connected appliances, especially when air conditioners and

battery chargers are running.

OVERFREQUENCY FAULT—CODE NO. 14

(Engine governor unable to maintain rated frequency)

Corrective Action: See an authorized Onan dealer.

UNDERFREQUENCY FAULT—CODE NO. 15

(Engine governor unable to maintain rated frequency)

Corrective Action:

1. Reduce the number of connected appliances, especially when air conditioners and battery chargers

are running.

2. High Pressure LPG Models − Drain the genset LPG system of oil that may have migrated from the

supply system (Item 5, Page 13). Make sure to re-close the drain valve.