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 |
|---|---|---|
| A sudden and unusual noise is heard | THE ENGINE MUST BE STOPPED IMMEDIATELY | |
| Blue smoke | High oil sump level | Replace the engine oil; if the problem persists, contact KOHLER authorised workshops |
| 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 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 |
| Low idle speed | Clogged fuel pipes | Contact KOHLER authorised workshops |
| 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 colour of the exhaust fumes suddenly darkens | THE ENGINE MUST BE STOPPED IMMEDIATELY | |
| 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 |
| The engine rpms suddenly increase and decrease | THE ENGINE MUST BE STOPPED IMMEDIATELY |
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.