28 Doosan generator fault/alarm codes with symptom, cause and remedy — compiled from Doosan service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 00-1 | Generator set emergency stop | ||
| 01-1 | External emergency stop | ||
| 02-1 | Engine oil pressure | ||
| 03-1 | Engine water temperature | ||
| 04-1 | Daily fuel tank level low | ||
| 05-1 | Radiator water level low | ||
| 06-1 | Alternator overload or short-circuit | ||
| 07-1 | Engine overspeed | ||
| 08-1 | Max. battery voltage | ||
| 09-1 | Max. alternator voltage | ||
| 12-1 | Max. alternator frequency | ||
| 25-0 | Normal contactor open (system side) | ||
| 26-0 | Emergency contactor open (generating set side) | ||
| 27-1 | Oil temperature | ||
| 28-1 | Oil level low | ||
| 34-1 | Battery charger fault | ||
| 46-1 | Main circuit breaker open | ||
| 47-0 | Overload | ||
| CAN DATA FAIL | CAN DATA FAIL | Indicates failure of the CAN data link to the engine ECU | Check all wiring and termination resistors (if required) |
| CAN ECU SHUTDOWN | CAN ECU SHUTDOWN | This indicates a fault condition detected by the engine ECU and transmitted to the DSE controller | |
| CAN ECU WARNING | CAN ECU WARNING | This indicates a fault condition detected by the engine ECU and transmitted to the DSE controller | |
| FAULT | Engine stalled at 0rpm with 15.0mA and 10.0 o Btdc readings. | A diagnostic fault exists, which will inhibit the ignition from firing. | The ignition system will stop operating under a fault condition and will alert the operator to the problem in several ways: by changing the state of the Fire Confirm Out switch (switch opens), by turning on the alarm LED inside the Ignition Module, by changing the state of the Alarm Out switch (switch opens), by changing the state of the Fault Out switch (switch opens), and by displaying the Fault message. |
| Five (5) blinks | Oil pressure switch or Engine speed sensor (magnetic pick-up) malfunction — Status lamps will flash five times continuously on the Clarke instrument panel and a "Low Engine Coolant Temperature" alarm will be sent to the fire pump controller via circuit #312 | Oil pressure switch failure or magnetic pick-up failure | Oil Pressure switch check. Verify wiring and connector at engine oil pressure switch are secure. Pressure switch is located on right side of engine next to the flywheel housing on DP6H & DQ6H engine models and near the oil filters on DR8H, DS0H, and DT2H engine models. With engine off, check continuity between the two terminals on the oil pressure switch. Note, do not disconnect wires when performing this task. If circuit is open, replace oil pressure switch. After new switch is replaced: On the Clarke instrument panel, operate the "OVERSPEED RESET" switch for two (2) seconds and release. The "INITIALIZATION PATTERN" will flash. This is normal. The continuous five (5) blink flash sequence should turn off at this point. If circuit is closed, the oil pressure switch is not damaged and is working normally as expected. Proceed to engine speed sensor check, below. Engine speed sensor (magnetic pick-up) check: Verify wiring and connector at engine speed sensor are secure. Magnetic pick-up is located on the right side of the engine on the flywheel housing. With engine running, verify that the tachometer is functioning normally. Refer to section 3.5.4 of Engine Operator's Manual to properly reposition the magnetic pick-up if tachometer is not functioning. Once magnetic pick-up is repositioned: On the Clarke instrument panel, operate the "OVERSPEED RESET" switch for two (2) seconds and release. The "INITIALIZATION PATTERN" will flash. This is normal. The continuous five (5) blink flash sequence should turn off at this point. If problem still exists, replace engine speed sensor (magnetic pick-up). |
| Oil pressure fault/shutdown | Red LED on | ||
| S9 | S9 | ||
| Three (3) blinks | Engine Coolant Temperature Sensor malfunction — Status lamps will flash three times continuously on the Clarke instrument panel and a "Low Engine Coolant Temperature" alarm will be sent to the fire pump controller via circuit #312 | Engine coolant temperature sensor circuit is open or shorted | Verify wiring and connector plug at engine coolant temperature sensor are secure. Sensor is located on top of engine on DP6H and DQ6H engine models, at the front of the engine near the cylinder head on DR8H and DS0H models, and behind engine heat exchanger as shown on DT2H engine models. On the Clarke instrument panel, operate the "OVERSPEED RESET" switch for four (4) seconds and release. The "INITIALIZATION PATTERN" will flash. This is normal. The continuous three (3) blink flash sequence should turn off at this point. If problem still exists, replace engine coolant temperature thermistor. |
| Two (2) blinks | Electrical Current Exceeds 10 Amps on Alarm Circuits — Status lamps will flash two times continuously on the Clarke instrument panel and a "Low Engine Coolant Temperature" alarm will be sent to the fire pump controller via circuit #312 | Electrical current exceeds 10 amps on one or more engine / fire pump controller inter-connect circuits: Engine run alarm (#2), Engine overspeed alarm (#3), Engine low oil pressure alarm (#4), Engine high coolant temperature alarm (#5), Engine low coolant temperature alarm (#312) | Check each of the above circuits to determine which contains the current overload. Once circuit(s) overload are corrected: On the Clarke instrument panel, operate the "OVERSPEED RESET" switch for two (2) seconds and release. The "INITIALIZATION PATTERN" will flash. This is normal. The continuous two (2) blink flash sequence should turn off at this point. |
| WARNING | Engine running at 1000rpm with 15.0mA and 10.0 o Btdc readings, display shows WARNING. | A diagnostic warning exists, which will alert the operator of a potential problem in several ways: by turning on the Alarm LED in the Ignition Module and by changing the state of the Alarm Out switch (switch opens). | The ignition system will continue to operate under a warning condition while alerting the operator of a potential problem. |
Compiled from Doosan service manuals and controller documentation. Cause/remedy shown where extracted; always verify against the manual for your exact model.
CAN DATA FAIL. Cause: Indicates failure of the CAN data link to the engine ECU. Remedy: Check all wiring and termination resistors (if required).
CAN ECU SHUTDOWN. Cause: This indicates a fault condition detected by the engine ECU and transmitted to the DSE controller.