The Inverter is a generator-set controller. It is used on generator sets from BOX, Cummins/Onan and Fast, including the R1250IS, R2000IS, R3000IS and P4500IDF.
Used across brands: BOX, Cummins/Onan, Fast
| Symptom | Cause | Remedy |
|---|---|---|
| *High engine temperature shutdown. | Check— a. Coolant level. Replenish if necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. d. Radiator model, check fan belts, radiator for obstructions, etc. | |
| *Low oil pressure shutdown. | Check— a. Oil level. Replenish if necessary. b. Sensor. Faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system. | |
| Engine lacks power | Air filter restricted. | Clean or replace air filter. |
| Engine runs rough or bogs when load applied | Dirty air filter. | Clean the air filter. |
| Engine runs, shuts down and cranks for 75-seconds. Cranking cycle stops; fault lamp lights. | Check fuel supply. | |
| Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON. | Check fuel supply. | |
| Engine starts, then shuts down | Out of fuel. | Refuel. |
| Engine stops cranking-and fault lamp lights, after cranking approximately 75 seconds. | See engine service manual for troubleshooting fuel system. After correcting problem, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset, then back to the required running position. | |
| Engine will not start | Battery switch in the OFF position. | Turn battery switch to the ON position. |
| Fault lamp lights and engine shuts down after running for a period. | Check the following: a. Oil level. Engine will shut down if sensor is closed. b. Check engine manual for troubleshooting oil system. c. High engine temperature. Check coolant level; check water flow (city water cooled systems); check radiator for free air flow, and fan belts for tightness. See engine manual for troubleshooting cooling system. d. Check for faulty oil pressure sensor or faulty high engine temperature sensor. | |
| Fault lamp lights immediately after engine starts. | Check for: Overspeed condition as engine starts. | |
| Fault lamp lights, no fault exists. | To check a no-fault condition, disconnect leads from TB11 terminals 29, 30 and 31. If fault lamp lights with leads disconnected, replace engine monitor board. Reconnect leads. | |
| No power at AC receptacles | OUTPUT READY LED is OFF and OVERLOAD LED is ON. | Check AC load. Stop and restart engine. |
| Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds. | See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. | |
| Overspeed light on, no shutdown. | Disconnect wire at TB11-29. Light on after reset; replace engine monitor board. | |
| Overspeed shutdown. | Check governor and throttle linkages for freedom of movement. Check overspeed switch. |
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.