EMCP 3.2 Controller

The EMCP 3.2 is a generator-set controller. It is used on generator sets from Caterpillar, including the DM9073, DM9628, SR4B and SR4B Generator.

Generator sets

Caterpillar

Brand

484–800 kW

Power range

Specifications

Display	LCD Display with adjustable contrast and backlight with auto power off, English, French or Spanish
Communications	Modbus RTU over RS485, CAN
Protections	Fail to start shutdown, Low oil pressure shutdown, High engine temperature, Approaching high coolant temperature alarm, Approaching low oil pressure alarm, Not in auto mode alarm, Underspeed / Overspeed, Loss of Engine Speed Detection, Low / High battery voltage, Battery charger failure (if fitted), Under volts, Over volts, Under frequency, Over frequency, Overcurrent

Troubleshooting

Symptoms & remedies

Symptom
Fail to start shutdown
Low oil pressure shutdown
High engine temperature
Approaching high coolant temperature alarm
Approaching low oil pressure alarm
Not in auto mode alarm
Underspeed / Overspeed
Loss of Engine Speed Detection
Low / High battery voltage
Battery charger failure (if fitted)
Under volts, Over volts
Under frequency, Over frequency
Overcurrent

Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Extracted directly from this controller's manual.

Generator sets using this controller

Caterpillar DM9073Caterpillar DM9628 Caterpillar SR4BCaterpillar SR4B Generator

Engines paired with this controller

Caterpillar C18 ATAAC Caterpillar C27 TA

Troubleshooting

Fault codes

Code	Meaning
21	Fault shutdown
22	Fault alarm
2301A Control	When the engine oil pressure is increased beyond the low oil pressure setpoint, the GSC will inform the governor that the engine speed should be increased from IDLE to RATED rpm.
g00604607	The fault alarm indicator (3) flashes when the GSC detects an alarm fault.

Symptoms & remedies

Symptom	Cause	Remedy
Emergency stop condition	Operator presses the Emergency Stop Push Button (ESPB) on the front panel.	The emergency stop indicator FLASHES and the engine is shut down. The engine is not allowed to start until the condition is corrected.
Emergency stop indicator flashes, and the engine is shut down.	The operator presses the emergency stop push button (ESPB) on the front panel.
Engine overcrank indicator flashes, and the engine is shut down.	The engine has been cranked for an extended period without starting.	Correct the condition by ensuring proper start-up procedures are followed.
Engine overspeed	Engine speed exceeds the setpoint for engine overspeed that is programmed into the GSC+.	The engine is shutdown and the engine is not allowed to start until the fault is corrected.
Engine overspeed indicator flashes, and the engine is shut down.	The engine speed exceeds a certain threshold set in the GSC+.	Correct the condition by addressing any issues that caused the engine to overspeed.
Generator parameters are not matched to the bus		If the generator and bus voltages, frequencies and phases are in sync, the lamps will light continuously. If not, the associated lamp will flash.
High water temperature	Engine coolant temperature rises above the setpoint for high water temperature shutdown that is programmed into the GSC+.	The engine is shutdown and the engine is not allowed to start until the fault is corrected.
High water temperature indicator flashes, and the engine is shut down.	The engine coolant temperature rises above the setpoint for high water temperature shutdown that is programmed into the GSC.
Low oil pressure	Engine oil pressure drops below the setpoints for low oil pressure shutdown that are programmed into the GSC+.	The tow oil pressure indicator FLASHES, and the engine is shut down. The engine is not allowed to start until the fault is corrected.
Low oil pressure indicator flashes, and the engine is shut down.	The engine oil pressure drops below the setpoints for low oil pressure shutdown that are programmed into the GSC. There are two low oil pressure setpoints. One setpoint is used when the engine is at idle speed. The other setpoint is used when the engine is at rated speed.
Overcrank	Engine does not start within the setpoint for overcrank.
The GSC+ detects a shutdown fault		The engine will shut down if the engine is running. The engine will not be allowed to start.
The GSC+ detects an alarm fault		Fault alarm indicator (26) is accompanied by an alarm fault code that is shown on the upper display (29) when the alarm codes key (30) is pressed.

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.