The APM403 is a generator-set controller. It is used on generator sets from John Deere, Kohler and SDMO, including the J 110 K, 2000REOZM, D700 and J40U.
Used across brands: John Deere, Kohler, SDMO
| Code | Meaning | Remedy |
|---|---|---|
| 32 | High Coolant Temperature | |
| 32A | Emergency Stop | Reset the emergency stop switch. |
| 40 | Pre High Coolant Temp. | |
| 41 | Pre Low Oil Pressure | Check and adjust oil level or replace oil pump. |
| 48 | Emergency Stop | |
| 62 | Low Battery Volts | |
| 63 | Low Fuel | Refuel the generator set. |
| Symptom | Cause | Remedy |
|---|---|---|
| Black smoke | Clogged air filter | |
| Blue smoke | High oil sump level | Replace the engine oil; if the problem persists, contact KOHLER authorised workshops |
| Engine does not start | Clogged fuel pipes | |
| Engine jerking | Clogged fuel pipes | Contact KOHLER authorised workshops |
| Engine lost its initial performance | Clogged air filter, Clogged fuel pipes | Replace with a new filter, Contact KOHLER authorised workshops |
| Engine overheats | Insufficient refrigerant fluid | |
| Engine starts but stops | Inefficient electrical connections, Sulphated battery terminals, Clogged fuel filter, Clogged fuel pipes | Clean the electrical contacts; if the problem persists, contact KOHLER authorised workshops, Clean the battery terminals, Replace with a new filter and clean the tank, Contact KOHLER authorised workshops |
| Excessive fuel consumption | High oil sump level | Replace the engine oil; if the problem persists, contact KOHLER authorised workshops |
| High noise level | Excessive valve clearances | |
| Inadequate performance | Clogged air filter | |
| Low idle speed | Clogged fuel pipes | Contact KOHLER authorised workshops |
| No acceleration | Clogged air filter | |
| Non-uniform speed | Air or water in the fuel circuit | |
| Oil and fuel dripping from the exhaust | Faulty spray nozzles (Turbo engines only) | |
| Oil level increase | High oil level | |
| Oil preassure too low | High oil level | |
| Poor quality fuel | Clean the tank and refuel with quality fuel | |
| RPM instability at idle speed | Clogged fuel pipes | Contact KOHLER authorised workshops |
| Slow acceleration | Clogged fuel filter | Replace the fuel filter |
| The engine does not start | Sulphated battery terminals corroded, Battery voltage too low, Low fuel level, Frozen fuel, Clogged fuel filter, Air suction in fuel system, Clogged air filter, Clogged pipes, Open fuse, Intake or exhaust system clogged | Clean the battery terminals, Recharge the battery or replace it, Refuel, Contact KOHLER authorised workshops, Replace with a new filter, Contact KOHLER authorised workshops, Replace with a new filter, Contact KOHLER authorised workshops, Clean the tank and refuel with quality fuel, Replace the engine oil; if the problem persists, contact KOHLER authorised workshops, Replace with a new fuse; if the problem persists, contact KOHLER authorised workshops |
| White smoke | Faulty spray nozzles (Turbo engines only) |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.