The PCC1301 is a generator-set controller. It is used on generator sets from Cummins/Onan, including the C 50, C100, C13 and C150.
| Code | Meaning | Cause |
|---|---|---|
| 251 | Unknown J1939 Fault | Can be caused by battery disconnection/isolation without a run data save operation. |
| Symptom | Remedy |
|---|---|
| Engine has overheated (engine temperature has risen above 230°F/110°C) or coolant level is low | A. Check coolant level and replenish if low. b. Check for possible coolant leakage points and repair if necessary. c. Check for obstructions to cooling airflow and correct as necessary. d. Check for a slipping fan belt and tighten if loose. e. Reset control and restart after locating and correcting problem. Contact an authorized service center if none of the above. |
| Engine oil pressure has dropped to 20 psi (138 kPa) | If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow step 4 procedure. |
| Engine runs and then shuts down, OVERSPEED lamp lights | Contact an authorized service center for service. |
| Engine starts from generator control panel but will not start automatically or from a remote panel (Note: The Run/Stop/Remote switch must be in the Remote position for automatic or remote starting) | Contact an authorized service center for service. |
| Engine will not crank | A. Fault lamp on. Correct fault and reset control. b. Poor battery cable connections. Clean the battery cable terminals and tighten all connections. c. Discharged or defective battery. Recharge or replace the battery. d. Emergency stop button is pushed in. To reset, pull switch out and move Run/Stop/Remote switch to Stop position. Then push test switch to Reset/Lamp position. e. Contact an authorized service center if none of the above. |
| Fault lamp lights but no fault exists. Engine gauges show oil pressure, engine temperature, and frequency (speed) are within normal limits | The monitor board or a sensor may be at fault. Contact an authorized service center. |
| Flash-out of Fault Codes | 1. The diagnostic mode key switch must be in the On (I) position to flash out the fault codes. 2. In the diagnostic mode: a) With no active faults, the Warning and Stop lamps will be illuminated without flashing OR b) With active faults, the ECM will begin to flash out codes by first turning on the Warning lamp. 3. The Warning lamp will then turn off and the ECM will begin flashing the Stop lamp in sequence to represent the active fault code number. 4. As the fault code is flashed, short pauses will occur to indicate completion of each digit. The Warning lamp will illuminate to indicate the beginning of a fault code. 5. The ECM will continue to flash a fault until the operator uses the Fault increment (↑) or decrement (↓) rocker switch to change to a new fault. |
| Green RUN lamp does not light following engine startup | Indicates possible Start/Disconnect relay failure. Contact an authorized service center for assistance. |
| HI ENG TEMP lamp lights. Engine shuts down. | Indicates engine temperature has risen to approximately 220°F (104°C) or coolant level is low. If generator is powering non-critical and critical loads and cannot be shut down, use the following: a. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. If engine can be stopped, follow procedure in step 3. |
| LO FUEL lamp lights. Engine continues to run | Indicates diesel fuel supply is running low. Check fuel supply and replenish as required. |
| LO FUEL lamp lights. Engine shuts down and LO OIL PRES lamp lights | Indicates engine has run out of fuel. Check fuel level and replenish as required. |
| LO OIL PRES lamp lights. Engine shuts down | A. Check oil level, lines and filters. b. If oil system is OK but oil level is low, replenish. c. Reset control and restart. Contact an authorized service center if oil pressure is not in the range of 29 to 65 psi (200 to 447 kPa). d. If engine can be stopped, follow procedure in Step 4. |
| No AC output voltage | Field breaker is tripped. Reset breaker. Contact an authorized service center if voltage buildup causes breaker to trip. |
| OVERCRANK lamp lights and engine stops cranking | A. Check for fuel prime, empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. b. Check for dirty fuel filter and replace if necessary (see Maintenance section). c. Check for dirty or plugged air filter and replace if necessary (see Maintenance section). d. Reset the control and restart after correcting the problem. Contact an authorized service center for service if none of the above. |
| SWITCH OFF lamp flashes | Indicates Run/Stop/Remote switch is in the Stop position which will prevent automatic starting if an automatic transfer switch is used. Move the Run/Stop/Remote switch to the Remote position for automatic starting. |
| The O/U VOLTAGE lamp lights | Contact an authorized service center for service. |
| The OVERLOAD lamp lights. Engine shuts down | The line circuit breaker is located in the output box or ATS. If load exceeds generator current rating, the breaker will trip preventing the generator from being overloaded and the genset will shut down. Locate the source of overload and correct as necessary. Manually reset breaker to reconnect the load to the generator. |
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.